CN119491182A - Environmentally friendly high corrosion resistant coated steel plate and its application - Google Patents
Environmentally friendly high corrosion resistant coated steel plate and its application Download PDFInfo
- Publication number
- CN119491182A CN119491182A CN202411466348.XA CN202411466348A CN119491182A CN 119491182 A CN119491182 A CN 119491182A CN 202411466348 A CN202411466348 A CN 202411466348A CN 119491182 A CN119491182 A CN 119491182A
- Authority
- CN
- China
- Prior art keywords
- coating
- equal
- steel plate
- high corrosion
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000005260 corrosion Methods 0.000 title claims abstract description 45
- 230000007797 corrosion Effects 0.000 title claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 88
- 239000011248 coating agent Substances 0.000 claims abstract description 85
- 239000011247 coating layer Substances 0.000 claims abstract description 28
- 239000010936 titanium Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims abstract description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 150000007524 organic acids Chemical class 0.000 claims abstract description 13
- 150000003608 titanium Chemical class 0.000 claims abstract description 11
- 238000007747 plating Methods 0.000 claims abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 7
- 239000000049 pigment Substances 0.000 claims abstract description 7
- 239000000080 wetting agent Substances 0.000 claims abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000008367 deionised water Substances 0.000 claims abstract description 3
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract 2
- 238000007602 hot air drying Methods 0.000 claims description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 239000011701 zinc Substances 0.000 claims description 13
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 8
- 230000005674 electromagnetic induction Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 2
- DQSBZDLZCZUJCJ-UHFFFAOYSA-N 2h-triazole-4,5-diamine Chemical compound NC=1N=NNC=1N DQSBZDLZCZUJCJ-UHFFFAOYSA-N 0.000 claims 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 239000011651 chromium Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000036541 health Effects 0.000 abstract description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 238000002161 passivation Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 7
- 229910021645 metal ion Inorganic materials 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229910000861 Mg alloy Inorganic materials 0.000 description 3
- -1 Mg2+ ions Chemical class 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-XIXRPRMCSA-N Mesotartaric acid Chemical compound OC(=O)[C@@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-XIXRPRMCSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 229940048879 dl tartaric acid Drugs 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses an environment-friendly high corrosion-resistant coated steel plate and application thereof, wherein the steel plate comprises a substrate and a coating layer, the coating layer comprises a plating layer and a coating layer from inside to outside, the chemical components of the plating layer comprise, by weight, 5-11% of Al, 1-3% of Mg, 0.01-0.2% of Ti and the balance of Zn, and the raw materials of a coating liquid required by the coating layer comprise, by weight, 10-20% of diaminotricyclopentadiene, 2-6% of titanium salt, 5-10% of hydrogen peroxide, 1-3% of organic acid, 1-2% of phosphoric acid, 1-2% of pigment, 0.5-1% of wetting agent and the balance of deionized water. The coating layer does not contain heavy metal chromium, is harmless to the health of human bodies, has good environmental protection, and realizes high corrosion resistance by adopting the high corrosion resistance plating layer and the high corrosion resistance coating.
Description
Technical Field
The invention belongs to the technical field of coating products and applications, and particularly relates to an environment-friendly high-corrosion-resistance coated steel plate and an application thereof.
Background
In the dual-carbon background, the national requirements for low-carbon emission reduction of enterprises are more and more strict, downstream customers of steel products put new demands on materials, the materials are coated with colored paint before being made by using hot galvanized plates, the materials are now required to have high corrosion resistance ①, ② presents a certain color to avoid a coating process so as to reduce carbon emission, and ③ has good connection corrosion performance. For iron and steel enterprises, the color-coated steel plate can meet the requirements of customers, but the cost of the color-coated steel plate is higher, the process flow is complex, and the carbon emission is increased.
The invention discloses a trivalent chromium multicolor passivating agent for a galvanized layer, a preparation method and a passivating treatment method thereof, and the trivalent chromium multicolor passivating agent for the galvanized layer comprises 65-75 g/L of chromic anhydride, 95-110 g/L of sulfuric acid, 10-20 g/L of sucrose, 10-200 g/L of chromium nitrate, 10-100 g/L of dispersing agent, 20-200 g/L of cobalt nitrate, 10-200 g/L of hydrofluoric acid, 5-150 g/L of citric acid, 5-150 g/L of DL-tartaric acid and the balance of water. The passivating agent can obtain two colors after passivation treatment, one is a bright blue film layer, and the other is a colorful film layer. However, the trivalent chromium coating can still be converted into toxic hexavalent chromium under the action of external environment, the environmental protection is poor, and the galvanized layer has the problem of insufficient corrosion resistance.
The Chinese patent application (CN 107775182A) discloses a preparation method of a screw hole structure for preventing galvanic corrosion and a structure thereof, and the preparation method comprises the following steps of prefabricating a connecting hole with a limiting function in a first metal part, processing a second metal part matched with the connecting hole and embedding the second metal part into the connecting hole, enabling the electrode potential of the second metal part to be higher than that of the first metal part, starting a friction stir welding machine, inserting a stirring head of the friction stir welding machine in rotation into the second metal part, staying for a set time, and ensuring the metallurgical bonding between the second metal part and the first metal part by utilizing heat generated by high-speed rotation of a stirring needle and a severe plastic deformation effect. The screw hole structure prepared by the invention can avoid the direct contact of the magnesium alloy material and the steel fastener, reduce the potential difference between the material and the fastener, and effectively prevent the galvanic corrosion of the magnesium alloy and the steel fastener during connection. The invention has the characteristics of convenient operation, stable quality and the like. The invention avoids the direct contact between the magnesium alloy and the steel, but the galvanic corrosion of the aluminum alloy and the steel still exists, and the control of the steel plate and the coating layer is not involved.
Aiming at the prior art, the method has the following problems that 1) trivalent chromium passivation solution is adopted to realize color, but chromium salt is toxic and has the problem of environmental protection, 2) no chromium passivation solution is adopted to realize color, but the problems of insufficient corrosion resistance and single color of passivation film are caused, 3) plating components are optimized, but the problems of complex process and insufficient corrosion resistance are caused, and 4) only materials or bolts are considered independently, so that an integral solution is not provided.
Disclosure of Invention
The invention aims at solving the technical problems and provides an environment-friendly high corrosion-resistant coated steel plate and application thereof.
The invention provides an environment-friendly high corrosion-resistant coated steel plate, which comprises a substrate and a coating layer, wherein the coating layer comprises a plating layer and a coating layer from inside to outside, and the chemical components of the plating layer comprise, by weight, 5-11% of Al, 1-3% of Mg, 0.01-0.2% of Ti and the balance of Zn;
The coating liquid required by the coating comprises, by weight, 10-20% of diaminotrialkene, 2-6% of titanium salt, 5-10% of hydrogen peroxide, 1-3% of organic acid, 1-2% of phosphoric acid, 1-2% of pigment, 0.5-1% of wetting agent and the balance of deionized water.
Further, the weight of the coating is 2-6 g/m 2.
Further, when the coating layer is light, the pressure between the coating roller and the strip steel is more than 0.9KN and less than or equal to 1KN, the pressure between the coating roller and the liquid taking roller is more than 0.3KN and less than or equal to 0.4KN, the rotating speed of the coating roller is more than or equal to 130m/min and less than or equal to 140m/min, the rotating speed of the liquid taking roller is more than or equal to 30m/min and less than or equal to 40m/min, and the ratio of the weight percentage m of Ti in the coating layer to the weight n of the coating layer per square meter is 1.6-100 m/n <3.0;
When the coating layer is of a medium color, the pressure between the coating roller and the strip steel is more than 0.8KN and less than or equal to 0.9KN, the pressure between the coating roller and the liquid taking roller is more than 0.2KN and less than or equal to 0.3KN, the rotating speed of the coating roller is more than 140m/min and less than or equal to 150m/min, the rotating speed of the liquid taking roller is more than 40m/min and less than or equal to 50m/min, and the weight ratio of the weight percent of Ti in the coating layer to the weight ratio of each square meter of the coating layer is 0.6<100m/n <1.6;
When the coating layer is dark, the pressure between the coating roller and the strip steel is more than or equal to 0.7KN and less than or equal to 0.8KN, the pressure between the coating roller and the liquid taking roller is more than or equal to 0.1KN and less than or equal to 0.2KN, the rotating speed of the coating roller is more than 150m/min and less than or equal to 160m/min, the rotating speed of the liquid taking roller is more than 50m/min and less than or equal to 60m/min, and the weight ratio of the Ti in the coating layer to the weight of the coating layer per square meter is 0.3<100m/n and less than or equal to 0.6.
Further, the matrix is any one of low carbon steel, ultra low carbon steel and low alloy high strength steel.
Further, the titanium salt is one or two of Ti (SO 4)2 and TiO (SO 4), and the organic acid is malonic acid or citric acid.
Further, the pigment is one or more of iron oxide red, iron blue, iron oxide yellow and zinc green.
Further, the wetting agent is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate.
Further, the pH value of the coating liquid is 2-5.
Further, the coating is cured in a mode of primary hot air drying, electromagnetic induction heating and secondary hot air drying after roller coating, the curing temperature is 110-150 ℃, the length of the primary hot air drying section is L1, the length of the electromagnetic induction heating section is L2, the length of the secondary hot air drying section is L3, and the L1, the L2 and the L3 meet the relational expression that the L1 is more than or equal to 6m and is more than or equal to 3m, the L2 is more than or equal to 6m and is more than or equal to 3m, and the L1+ L3 is more than or equal to 12m and is more than or equal to 6m.
The application of the environment-friendly high corrosion resistant coated steel plate is further provided, the steel plate is connected with other parts through bolts after being manufactured into parts, the bolts are subjected to coating treatment, and the chemical components of the coating comprise, by weight, 5-11% of Al, 1-3% of Mg, 1-3% of Ti and the balance of Zn.
According to the invention, the corrosion resistance is increased by adding Al and Mg into the coating, when the content of Al and Mg is too small, the corrosion resistance is limited, when the content of Al and Mg is relatively high, the surface quality problem such as zinc slag, zinc ash and the like is increased, and the bonding force between the coating and the coating is affected, so that the content of Al in the coating is controlled to be 5-11% and the content of Mg is controlled to be 1-3%, meanwhile, the invention is added with trace Ti, on one hand, the coating structure is thinned, the corrosion resistance is improved, on the other hand, the potential difference in connection with a bolt is reduced, the good connection corrosion performance is ensured, when the content of Ti in the coating is relatively small, the corresponding effect is not achieved, and when the content of Ti in the coating is relatively large, the surface quality control difficulty is increased, and therefore, the content of Ti in the coating is controlled to be 0.01-0.2%.
Secondly, the diaminotrialuminium is added into the coating to combine with Zn 2+、Al2+、Mg2+ ions in the coating to generate insoluble metal compounds, so that good shielding performance is formed for external Cl - ions and H 2 O molecules, corrosion resistance is improved, when the content of the diaminotrialuminium is small, the effect is not obvious, and when the content is large, the diaminotrialuminium is unfavorable for synergistic action with other components, therefore, the content of the diaminotrialuminium in the coating is controlled to be 10-20%. According to the invention, the titanium salt is added into the coating, the titanium salt is one or more of Ti (SO 4)2 or TiO (SO 4), the titanium salt has good passivation effect, and is subjected to coordination combination reaction with H 2O2 to form a complex formed between Ti 2+,Ti2+ and organic acid and metal ions to form a film, SO that compound pores formed by diaminotrialkene and metal ions can be filled, the shielding effect is further improved, when the titanium salt content is small, passivation and corrosion resistance cannot be realized, and when the titanium salt content is large, the stability of passivation solution is influenced, therefore, the titanium salt content is preferably controlled to be 2-6%. When the addition amount of H 2O2 is small, on one hand, metal ions of the matrix are not easy to precipitate and cannot form a compound film layer with diaminotrialkene, on the other hand, the concentration of OH - ions generated by the cathode is small, which is unfavorable for film forming reaction with the metal ions, but when the addition amount is too large, H 2O2 directly reacts with the metal ions to form a precipitate, and the uniformity of film forming is affected, so that the preferable addition amount of H 2O2 is controlled to be 5-10%. According to the invention, the organic acid is added, and compared with oxalic acid, the solubility of malonic acid and citric acid is good, and the precipitation phenomenon is not easy to occur, so that the organic acid is one of malonic acid and citric acid, the organic acid mainly plays a complexing role, is complexed with Ti ions to form a stable complex, fills a gap of a film layer, and when the organic acid content is low, the formed complex is insufficient, the film layer compactness is insufficient, but when the organic acid content is too high, the film is unfavorable to form a film with other components in a synergic manner, and therefore, the preferable addition amount of the organic acid is controlled to be 1-3%. In addition, phosphoric acid is added as a pH value regulator, when the content of phosphoric acid is too small, the time for forming a passivation film is longer, the corrosion resistance of the passivation film prepared in a shorter time is poor, when the content of phosphoric acid is too large, the corrosion is caused to a plating layer, and the corrosion resistance is influenced, therefore, the invention preferably controls the content of phosphoric acid to be 1-2%, and simultaneously controls the pH value of passivation solution, when the pH value is too small, the concentration of hydrogen ions in the solution is larger, so that the plating layer is dissolved, and when the pH value is too large, the uniformity of the passivation film is influenced, and therefore, the invention controls the pH value to be 2-5.
The coating provided by the invention is mainly composed of a compound formed by diaminotrialkene and Zn 2+、Al2+、Mg2+ ions and a complex of Ti through the component design, wherein the compound composed of the diaminotrialkene and Zn 2+ accounts for a large part. The inventors have found that the color of the coated steel sheet is determined by the interference of light, the compound chelated with the metal ion by the diaminotrialkane has no color under the interference of light, and the complex of Ti changes from dark to light according to the content from small to large, and at the same time, the relation between the color of the coating and the thickness of the coating is larger, the thicker the coating is, the longer the time the light rays are injected from the coating to refract from the interface between the coating and the coating is, and the darker the observed color is. Based on the principle, the inventor researches that when the pressure between the coating roller and the strip steel is more than 0.9KN and less than or equal to 1KN, the pressure between the coating roller and the liquid taking roller is more than 0.3KN and less than or equal to 0.4KN, the rotating speed of the coating roller is more than or equal to 130m/min and less than or equal to 140m/min, the rotating speed of the liquid taking roller is more than or equal to 30m/min and less than or equal to 40m/min, the ratio of the weight of Ti in the coating to the weight n of the coating per square meter is 1.6 and less than or equal to 100m/n <3.0, the coating layer is light color, when the pressure between the coating roller and the strip steel is more than or equal to 0.8KN and less than or equal to 0.9KN, the pressure between the coating roller and the liquid taking roller is more than or equal to 0.2KN and less than or equal to 0.3KN, the rotating speed of the coating roller is more than or equal to 140m/min and less than or equal to 150m/min, the rotating speed of the liquid taking roller is more than or equal to 40m/min and less than or equal to 40m/min, the ratio of the coating layer weight n is 1.6 and less than or equal to 100 m/min, the ratio of the weight n of Ti in the coating to 1.6 and less than or equal to 1.6 m < 3.0.6 m/m < 0.m/m <0, and less than or equal to 1.m < 0m/m < 0m, and less than or equal to 1m < 0m, and less than or equal to 0m <0 m. And in addition, 1-2% of pigment is added into the coating component to meet the requirements of different colors of clients, wherein the pigment is one or a combination of iron oxide red, iron blue, iron oxide yellow and zinc green. In addition, 0.5-1% of wetting agent is added, and the wetting agent is one of sodium dodecyl sulfate or sodium dodecyl benzene sulfonate so as to play a role in wetting and enhance the uniformity of the passivation film.
According to the invention, after the coating is rolled and solidified by a first hot air drying, electromagnetic induction heating and a second hot air drying mode, the hot air drying heating heats the coated steel plate from the surface to the substrate, and the electromagnetic induction heating heats the substrate from the surface to the surface, so that the inventor researches and discovers that the complex reaction of diaminotrialkene, metal ions and Ti ions and organic acid has a certain relaxation time through hot air drying, and then the electromagnetic induction heating and the hot air drying solidification are carried out, and meanwhile, the length of a hot air drying section 1 is controlled to be L1, the length of the electromagnetic induction heating section is controlled to be L2, and the length of the hot air drying section 2 is controlled to be L3, wherein the length of the hot air drying section 2 is controlled to be L3, the length of the hot air drying section 2 is more than or equal to 6m, the length of the hot air drying section is more than or equal to 3m, the length of the hot air drying section 2 is more than or equal to 3m, and the length of the hot air drying section 2 is more than or equal to 12m (L1+L3) >6m, and the best compactness of the coating quality can be obtained. In addition, when the curing temperature is low, the film forming reaction is slow, and when the curing temperature is high, the film layer is loose, so that the curing temperature is 110-150 ℃.
When the parts made of the coated steel plate are connected with the bolts, and are connected with common galvanized bolts and stainless steel bolts, galvanic corrosion occurs due to potential difference between the parts, and the parts fail at the connecting positions, so that the corrosion resistance of the coated steel plate is affected. According to the invention, the bolt is subjected to coating treatment, the components of the coating are controlled to be 5-11% of Al, 1-3% of Mg, 1-3% of Ti and the balance of Zn, and AlZnTi phases formed in the coating of the bolt are corroded firstly when the coated steel plate is connected with the bolt and placed in an external environment, and the coating of the coated steel plate is corroded at the moment, and after the coating of the steel plate is corroded, the potential difference between the coating and the coating of the bolt is basically consistent, so that the galvanic corrosion tendency is weakened, and long-time safe and reliable application is realized.
Compared with the prior art, the invention has the beneficial effects that the coating layer does not contain heavy metal chromium, is harmless to the health of human bodies and has good environmental protection, the manufacturing of coated steel plates with different colors is realized through coating components and coating processes, the color coating process is reduced in the steel process, the cost is reduced, the carbon emission is reduced, the coating process is avoided at a downstream client, the carbon emission is also reduced, the environment protection is obvious in the whole life cycle of the product, the high corrosion resistance is realized by adopting the high corrosion resistant coating and the high corrosion resistant coating, the good connection corrosion performance is realized when the steel plates are applied through the bolt coating, and the long-time safe and reliable application of parts can be ensured.
Detailed Description
The invention will be further illustrated with reference to specific examples.
The environment-friendly high corrosion resistant coated steel plate and the components and the application thereof are shown in table 1, the process is shown in table 2, and the implementation effect is shown in table 3. The base material is any one of low carbon steel, ultra low carbon steel and low alloy high strength steel.
TABLE 1
TABLE 2
The color of the coating layer was visually observed, and the corrosion resistance was tested according to GB 10125, and the time for 5% red rust to appear at the joints of the coated steel plates of examples and comparative examples and bolts was observed.
TABLE 3 Table 3
| Category(s) | Coating color | Time to 5% red rust (h) |
| Example 1 | Pale yellow | 1368 |
| Example 2 | Bluish color | 1920 |
| Example 3 | Medium yellow | 3384 |
| Example 4 | Medium green | 1896 |
| Example 5 | Deep yellow | 2928 |
| Example 6 | Deep purple color | 5016 |
| Comparative example 1 | Pale yellow | 1080 |
| Comparative example 2 | Dark grey | 1800 |
| Comparative example 3 | Deep yellow | 2718 |
| Comparative example 4 | Light green | 1560 |
| Comparative example 5 | Deep yellow | 2616 |
| Comparative example 6 | Deep purple color | 816 |
| Comparative example 7 | Deep purple color | 288 |
The foregoing description is only illustrative of the present invention, and it is to be understood that the specific implementation of the present invention is not limited by the foregoing manner, and it is within the scope of the present invention to apply the technical concept and technical solution of the present invention to other situations without any substantial improvement or any improvement.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411466348.XA CN119491182A (en) | 2024-10-21 | 2024-10-21 | Environmentally friendly high corrosion resistant coated steel plate and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411466348.XA CN119491182A (en) | 2024-10-21 | 2024-10-21 | Environmentally friendly high corrosion resistant coated steel plate and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119491182A true CN119491182A (en) | 2025-02-21 |
Family
ID=94622284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411466348.XA Pending CN119491182A (en) | 2024-10-21 | 2024-10-21 | Environmentally friendly high corrosion resistant coated steel plate and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119491182A (en) |
-
2024
- 2024-10-21 CN CN202411466348.XA patent/CN119491182A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108866529B (en) | Environment-friendly passivated aluminized silicon steel plate with excellent corrosion resistance and high temperature resistance and production method | |
| CN106148974A (en) | A kind of iron and steel derusting and phosphorating agent | |
| CN102220578A (en) | Chemical oxidation liquid for aluminum alloy | |
| CN1986883A (en) | Environment friendly no-chromium conversion treating solution | |
| CN101135050B (en) | Metasilicate cleaning inactivating process | |
| CN103266313B (en) | A kind of electrogalvanizing environmental protection passivating solution and using method thereof | |
| CN105839047A (en) | Zincizing infiltrated layer corrosion resistance process for metal | |
| CN102268664B (en) | Chromium-free passivating solution used for black passivation treatment of zinc plating and preparation method thereof | |
| CN101525747B (en) | A clean rare earth salt passivation solution | |
| CN102787313A (en) | Treatment solution and treatment method for preparing molybdenum-cerium composite conversion film on magnesium alloy surface | |
| CN106894012B (en) | Aluminium and aluminum alloy surface processing passivating solution and its application of a kind of manganate as main salt | |
| CN102089463B (en) | Tin-plated steel sheet and method for producing same | |
| CN101230457B (en) | Zinc-Nickel Composite Mechanical Plating Process | |
| CN105063596A (en) | Treating fluid for chromate-free passivation of aluminum profiles before coating and preparation method thereof | |
| CN101660156B (en) | Silicate color passivation solution used for zinc-plating material | |
| CN113699514B (en) | Zinc-aluminum-magnesium coating passivator, passivation film and passivation plate | |
| CN111155077B (en) | Chromium-free passivation solution for electrogalvanizing and passivation process thereof | |
| CN119491182A (en) | Environmentally friendly high corrosion resistant coated steel plate and its application | |
| CN104018153A (en) | Multi-step hot-dip galvanizing passivation method | |
| KR20100106031A (en) | Trivalent chromate solution for zn electrodeposition composition | |
| CN103397323B (en) | A kind of without phosphorus agent of normal temperature leather diaphragm without slag | |
| CN113445039B (en) | Zinc surface chromium-free passivation solution and passivation method | |
| CN105401140B (en) | A kind of zinc-plated color passivation solution and preparation method thereof | |
| CN116334610A (en) | A kind of environment-friendly chromium-free passivator with high corrosion resistance and preparation method thereof | |
| CN101200799A (en) | Medium-low temperature and high corrosion resistance black phosphating solution for steel surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |