CN112501599A - Multipurpose chromium-free metal surface conversion agent and preparation method thereof - Google Patents
Multipurpose chromium-free metal surface conversion agent and preparation method thereof Download PDFInfo
- Publication number
- CN112501599A CN112501599A CN202011611465.2A CN202011611465A CN112501599A CN 112501599 A CN112501599 A CN 112501599A CN 202011611465 A CN202011611465 A CN 202011611465A CN 112501599 A CN112501599 A CN 112501599A
- Authority
- CN
- China
- Prior art keywords
- acid
- conversion agent
- chromium
- multipurpose
- metal surface
- 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
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 53
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 239000002253 acid Substances 0.000 claims abstract description 39
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 22
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 16
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 16
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 11
- 238000007739 conversion coating Methods 0.000 claims abstract description 11
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 11
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000007598 dipping method Methods 0.000 claims abstract description 5
- 238000007761 roller coating Methods 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000010924 continuous production Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000011701 zinc Substances 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 abstract description 8
- 239000007921 spray Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000547 2024-T3 aluminium alloy Inorganic materials 0.000 description 1
- 229910000755 6061-T6 aluminium alloy Inorganic materials 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C23C22/34—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 fluorides or complex fluorides
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a multipurpose chromium-free metal surface conversion agent and a preparation method thereof, and is characterized in that the conversion agent comprises the following components in percentage by mass: 0.5-5% of hydrofluoric acid, 1.0-10% of ammonia water, 0.5-10% of fluozirconic acid, 1.0-10% of fluotitanic acid, 1.0-15% of nitric acid, 1.0-10% of phosphoric acid, 0.5-5% of sodium molybdate, 5.0-15% of film forming accelerant and the balance of deionized water. The conversion agent is a chromium-free green environment-friendly product; the surface treatment can be carried out on various materials such as steel, zinc, aluminum and alloy thereof; the conversion coating generated by the product meets the requirements of different methods and grades in the American air force specification MIL-C-5541B, and has strong binding force and excellent corrosion resistance; the product is suitable for various process requirements of continuous production, roller coating, dipping, spraying and the like of a coil machine set; the conversion time by using the conversion agent is short, the cost is low and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, and mainly relates to a chromium-free environment-friendly multipurpose conversion agent and a preparation method thereof.
Background
The metal surface is treated to generate the conversion coating which can play a role of corrosion prevention, so that the service life of the conversion coating can be effectively prolonged. However, the metal surface treatment technology that is currently widely used is still based on the conventional chromate oxidation process. Although the method has low cost and convenient operation, and the generated conversion coating has excellent corrosion resistance, the process involves hexavalent or trivalent chromium which is a highly toxic substance and has carcinogenicity and seriously harms human health. The enactment of ROHS, ELV and WEEE regulations in the european union has made it clear that hexavalent chromium-containing electronic and electrical equipment is prohibited from being released to the market. In recent years, the requirement of China on environmental protection is continuously improved, and zero tolerance is also provided for chromium ions in wastewater discharge. Therefore, the development of non-toxic, environment-friendly and efficient metal surface treatment technology is a common consensus in the academic and industrial fields.
Although there have been many studies on chromium-free conversion agents, most of the current conversion agents are only suitable for use in immersion or spray processes, for example, chromium-free passivation compositions, chromium-free passivators and methods of preparation thereof (CN 107653449B), and conversion agents thereof are only suitable for use in immersion treatment; a composite chromium-free slow-release passivator and preparation and application thereof (CN 111074253A), wherein a conversion agent is only used for dipping or spraying treatment. Further, most of the conventional conversion agents are only for a single metal species, and cannot simultaneously satisfy the surface treatment requirements of different metal species, for example, a chromium-free coating composition and a surface-treated steel sheet (CN 107109114B) excellent in blackening resistance and corrosion resistance are only suitable for the surface treatment of steel sheets; a galvanized sheet chromium-free environment-friendly passivator and a preparation and use method (CN 110616422A), which are only suitable for surface treatment of galvanized sheets. In addition, most of the conversion agents currently produce conversion coatings with poor corrosion resistance and poor bonding force with the substrate. So far, no corresponding conversion agent can meet the requirements of various production processes such as continuous production, roller coating, dipping, spraying and the like of a coil machine set, can be suitable for various different types of metal materials, and can generate a high-quality conversion coating meeting the requirements of different methods and grades in the American air force specification MIL-C-5541B.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a multipurpose chromium-free metal surface conversion agent and a preparation method thereof, and the specific technical scheme is as follows:
the multipurpose chromium-free metal surface conversion agent is characterized by comprising the following components in percentage by mass: 0.5-5% of hydrofluoric acid, 1.0-10% of ammonia water, 0.5-10% of fluozirconic acid, 1.0-10% of fluotitanic acid, 1.0-15% of nitric acid, 1.0-10% of phosphoric acid, 0.5-5% of sodium molybdate, 5.0-15% of film forming accelerant and the balance of deionized water.
The film forming promoter is one or a mixture of a plurality of fluoboric acid and fluosilicic acid.
The conversion agent is made of various materials such as steel, zinc, aluminum and alloy thereof.
The preparation method of the conversion agent comprises the following steps:
(1) according to the formula composition of raw materials, hydrofluoric acid, fluorozirconic acid, fluotitanic acid, nitric acid, phosphoric acid and deionized water are fully stirred to prepare a solution A;
(2) according to the formula composition of the raw materials, ammonia water, sodium molybdate, a film forming promoter and the like are dissolved in a proper amount of deionized water, and the solution B is prepared after the ammonia water, the sodium molybdate, the film forming promoter and the like are fully stirred and dissolved;
(3) and slowly adding the solution A into the solution B, and fully stirring to obtain the chromium-free conversion agent.
The invention has the beneficial effects that:
(1) the conversion agent is a chromium-free green environment-friendly product;
(2) the conversion agent can be used for carrying out surface treatment on various materials such as steel, zinc, aluminum and alloy thereof;
(3) the conversion coating generated by the conversion agent meets the requirements of different methods and grades in the American air force specification MIL-C-5541B, and has strong binding force and excellent corrosion resistance;
(4) the conversion agent is suitable for the requirements of various production processes such as continuous production of a coil machine set, roller coating, dipping, spraying and the like;
(5) the conversion agent of the invention has short conversion time, low cost and high efficiency.
Detailed Description
Example 1
A multipurpose chromium-free metal surface conversion agent and a preparation method thereof are disclosed, wherein the conversion agent comprises the following components in percentage by mass: 2% of hydrofluoric acid, 5% of ammonia water, 2.5% of fluozirconic acid, 2.5% of fluotitanic acid, 5% of nitric acid, 3% of phosphoric acid, 2% of sodium molybdate, 5% of film forming accelerant and the balance of deionized water.
The film forming accelerant is as follows: 5% of fluoboric acid;
the preparation method of the conversion agent comprises the following steps:
(1) according to the formula composition of raw materials, hydrofluoric acid, fluorozirconic acid, fluotitanic acid, nitric acid, phosphoric acid and deionized water are fully stirred to prepare a solution A;
(2) according to the formula composition of the raw materials, ammonia water, sodium molybdate, fluoroboric acid and the like are dissolved in a proper amount of deionized water, and the solution B is prepared after the ammonia water, the sodium molybdate, the fluoroboric acid and the like are fully stirred and dissolved;
(3) and slowly adding the solution A into the solution B, and fully stirring to obtain the chromium-free conversion agent.
The conversion agent prepared by the embodiment is used for respectively carrying out continuous coil machine set process treatment on the surfaces of 2024-T3 aluminum alloy and 6061-T6 aluminum alloy, the conversion film layer after treatment is flat and compact and has uniform color, and the conversion film layer is tested for performances such as corrosion resistance, binding force, contact resistance and the like (test method and requirements, remarks are provided below), and test results are qualified.
Example 2
A multipurpose chromium-free metal surface conversion agent and a preparation method thereof are disclosed, wherein the conversion agent comprises the following components in percentage by mass: 3% of hydrofluoric acid, 6% of ammonia water, 3% of fluozirconic acid, 3% of fluotitanic acid, 3.5% of nitric acid, 3.5% of phosphoric acid, 4% of sodium molybdate, 6% of film forming accelerant and the balance of deionized water.
The film forming accelerant is as follows: 3% of fluoboric acid and 3% of fluosilicic acid;
the preparation method of the conversion agent comprises the following steps:
(1) according to the formula composition of raw materials, hydrofluoric acid, fluorozirconic acid, fluotitanic acid, nitric acid, phosphoric acid and deionized water are fully stirred to prepare a solution A;
(2) according to the formula composition of the raw materials, ammonia water, sodium molybdate, fluoboric acid, fluosilicic acid and the like are dissolved in a proper amount of deionized water, and the solution B is prepared after the ammonia water, the sodium molybdate, the fluoboric acid, the fluosilicic acid and the like are fully stirred and dissolved;
(3) and slowly adding the solution A into the solution B, and fully stirring to obtain the chromium-free conversion agent.
The converter prepared in the embodiment is used for respectively carrying out roller coating process treatment on the surfaces of ZG10Cr13 steel, ASTMA526 galvanized plates and ASTMA642 galvanized plates for 8 m/min, the treated conversion film layer is flat and compact and has uniform color, and the performances of corrosion resistance, binding force, contact resistance and the like of the conversion film layer are tested (test method and requirements, remarks are made below), so that the test results are qualified.
Example 3
A multipurpose chromium-free metal surface conversion agent and a preparation method thereof are disclosed, wherein the conversion agent comprises the following components in percentage by mass: 4% of hydrofluoric acid, 7.5% of ammonia water, 4% of fluozirconic acid, 4% of fluotitanic acid, 5% of nitric acid, 5% of phosphoric acid, 2.5% of sodium molybdate, 10% of film forming accelerant and the balance of deionized water.
The film forming accelerant is as follows: 4% of fluoboric acid and 6% of fluosilicic acid;
the preparation method of the conversion agent comprises the following steps:
(1) according to the formula composition of raw materials, hydrofluoric acid, fluorozirconic acid, fluotitanic acid, nitric acid, phosphoric acid and deionized water are fully stirred to prepare a solution A;
(2) according to the formula composition of the raw materials, ammonia water, sodium molybdate, fluoboric acid, fluosilicic acid and the like are dissolved in a proper amount of deionized water, and the solution B is prepared after the ammonia water, the sodium molybdate, the fluoboric acid, the fluosilicic acid and the like are fully stirred and dissolved;
(3) and slowly adding the solution A into the solution B, and fully stirring to obtain the chromium-free conversion agent.
The conversion agent prepared in the embodiment is used for respectively carrying out spraying process treatment on the surfaces of HT100 steel and ASTMA642 galvanized plates for 10 min, the conversion film layer after treatment is flat and compact and has uniform color, and the conversion agent is tested for performances such as corrosion resistance, binding force, contact resistance and the like (test method and requirements, remarks are made below), and the test results are qualified.
Remarking:
corrosion resistance test (see US air force Specification MIL-C-5541B): the samples were tested in a 5% neutral salt spray for 168 hours with the surface tilted 6 + -2 degrees from vertical. After exposure, the samples were cleaned in tap water at no more than 38 ℃ and purged with clean, dry, unheated air. And visually inspecting the sample, wherein the sample does not exceed 5 isolated points or pits, and the diameter of each spot does not exceed 0.787mm, and the sample is qualified.
Wet tape adhesion test (see U.S. Federal Standard FED-STD-141 method 6301): and (4) no separation between the paint system and the conversion coating or between the conversion coating and the substrate occurs, namely the paint system is qualified.
Resistance test (refer to U.S. department of defense specification MIL-DTL-81706): the conversion coating had a resistance value of no greater than 5000 μ Ω per square inch and was found to have a resistance value of no greater than 10000 μ Ω per square inch after 168 hours of neutral salt spray exposure, which was acceptable.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (5)
1. The multipurpose chromium-free metal surface conversion agent is characterized by comprising the following components in percentage by mass: 0.5-5% of hydrofluoric acid, 1.0-10% of ammonia water, 0.5-10% of fluozirconic acid, 1.0-10% of fluotitanic acid, 1.0-15% of nitric acid, 1.0-10% of phosphoric acid, 0.5-5% of sodium molybdate, 5.0-15% of film forming accelerant and the balance of deionized water.
2. The multipurpose chromium-free metal surface conversion agent according to claim 1, wherein the film forming promoter is one or a mixture of fluoboric acid and fluosilicic acid.
3. The multipurpose chromium-free metal surface conversion agent according to claim 1, wherein the conversion agent is made of various materials such as steel, zinc, aluminum and alloy thereof.
4. The method of claim 1, wherein the method comprises the steps of:
(1) according to the formula composition of raw materials, hydrofluoric acid, fluorozirconic acid, fluotitanic acid, nitric acid, phosphoric acid and deionized water are fully stirred to prepare a solution A;
(2) according to the formula composition of the raw materials, ammonia water, sodium molybdate, a film forming promoter and the like are dissolved in a proper amount of deionized water, and the solution B is prepared after the ammonia water, the sodium molybdate, the film forming promoter and the like are fully stirred and dissolved;
(3) and slowly adding the solution A into the solution B, and fully stirring to obtain the chromium-free conversion agent.
5. The multipurpose chromium-free metal surface conversion agent and the preparation method thereof according to claim 1, wherein the conversion agent can be used for various process requirements of continuous production, roller coating, dipping, spraying and the like of a coil machine set, and the generated conversion coating can meet the requirements of different methods and grades in American air force specification MIL-C-5541B, and has strong binding force and excellent corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011611465.2A CN112501599A (en) | 2020-12-31 | 2020-12-31 | Multipurpose chromium-free metal surface conversion agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011611465.2A CN112501599A (en) | 2020-12-31 | 2020-12-31 | Multipurpose chromium-free metal surface conversion agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112501599A true CN112501599A (en) | 2021-03-16 |
Family
ID=74952116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011611465.2A Pending CN112501599A (en) | 2020-12-31 | 2020-12-31 | Multipurpose chromium-free metal surface conversion agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112501599A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108070852A (en) * | 2016-11-18 | 2018-05-25 | 中国科学院金属研究所 | One kind is applied to 2024 aluminum alloy surface titanium zirconium conversion fluids and its application method |
| CN112030151A (en) * | 2020-08-29 | 2020-12-04 | 合肥朗逸表面处理有限公司 | No-clean chromium-free conversion agent for continuous coil unit and preparation method thereof |
-
2020
- 2020-12-31 CN CN202011611465.2A patent/CN112501599A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108070852A (en) * | 2016-11-18 | 2018-05-25 | 中国科学院金属研究所 | One kind is applied to 2024 aluminum alloy surface titanium zirconium conversion fluids and its application method |
| CN112030151A (en) * | 2020-08-29 | 2020-12-04 | 合肥朗逸表面处理有限公司 | No-clean chromium-free conversion agent for continuous coil unit and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1404894B1 (en) | Corrosion resistant coatings for aluminum and aluminum alloys | |
| JP3883831B2 (en) | Surface-treated steel sheet with excellent white rust resistance and method for producing the same | |
| JP5230428B2 (en) | Water-based treatment liquid for Sn-based plated steel sheet having excellent corrosion resistance and paint adhesion and method for producing surface-treated steel sheet | |
| EP0123980A1 (en) | Composition and process for zinc phosphate coating a metal surface and a process for painting the coated surface | |
| WO2010050131A1 (en) | Treatment solution for chemical conversion of metal material and method for treatment | |
| CN102776501A (en) | A kind of chromium-free passivation method and chromium-free passivation solution for aluminum and aluminum alloy | |
| JPH07126859A (en) | Hexavalent chromium-free chemical conversion surface treatment agent for aluminum and aluminum alloys | |
| NO841005L (en) | COATED METAL SUBSTRATE AND PROCEDURE IN THE PREPARATION OF THIS | |
| WO2004065648A2 (en) | Corrosion resistant coating with self-healing characteristics | |
| CN112030151A (en) | No-clean chromium-free conversion agent for continuous coil unit and preparation method thereof | |
| CN106958024B (en) | A kind of environment-friendly derusting phosphating agent and its preparation and use method | |
| JPH055899B2 (en) | ||
| JP3737168B2 (en) | Manufacturing method of electrogalvanized steel sheet with high whiteness and excellent paintability | |
| CN112501599A (en) | Multipurpose chromium-free metal surface conversion agent and preparation method thereof | |
| US6200693B1 (en) | Water-based liquid treatment for aluminum and its alloys | |
| CN115074714B (en) | Treatment liquid for composite conversion film on surface of tin plate and process for preparing conversion film by using treatment liquid | |
| JPH07118872A (en) | Method for forming poorly soluble chromate film on zinc-containing metal plated steel sheet | |
| US5888315A (en) | Composition and process for forming an underpaint coating on metals | |
| JP3993729B2 (en) | Metal plate material excellent in corrosion resistance, paintability, fingerprint resistance and workability, and manufacturing method thereof | |
| WO2009138022A1 (en) | A composition for conversion coating a zinciferous metal substrate, a method for treating a zinciferous metal substrate, a treated zinciferous metal substrate and its use | |
| WO2001077411A1 (en) | Method for forming phosphate coatings on nonferrous metals and plated steel sheets | |
| CN112501547A (en) | Pollution-free composite zinc impregnation process for super corrosion-resistant metal component | |
| AU699822B2 (en) | Composition and process for forming an underpaint coating on metals | |
| CN1066893A (en) | Multi-funcitonal rust-proof agent | |
| CN114892154B (en) | High-corrosion-resistance phosphating solution for wind power main shaft bearing and phosphating method |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |