CN105349976A - Surface treatment technology of aluminum plate - Google Patents
Surface treatment technology of aluminum plate Download PDFInfo
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- CN105349976A CN105349976A CN201510747993.3A CN201510747993A CN105349976A CN 105349976 A CN105349976 A CN 105349976A CN 201510747993 A CN201510747993 A CN 201510747993A CN 105349976 A CN105349976 A CN 105349976A
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- aluminum plate
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 71
- 238000004381 surface treatment Methods 0.000 title claims abstract description 12
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000002161 passivation Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 229910001923 silver oxide Inorganic materials 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 8
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 8
- 239000013530 defoamer Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 claims description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- 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
-
- 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
- C23C22/24—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 hexavalent chromium compounds
-
- 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
- C23C22/78—Pretreatment of the material to be coated
-
- 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
- C23C22/82—After-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
本发明涉及一种铝板表面处理工艺，包括以下步骤：（1）、将铝板进行清洗；（2）、铝板钝化处理；（3）、喷涂底漆；（4）、喷涂面漆；本发明的方法在对铝板处理时，先在清洗后使用氧化银与煤油进行擦拭，可以除去铝板表面的异物，又能够提升后续钝化时的均匀性及钝化层的致密度，而且处理后，可以增大钝化层的厚度，大大提升铝板的防腐蚀性能及钝化后铝板表面的平整度；在钝化后再喷涂油漆，进一步提升铝材的防腐性，还可以提升其美观性，在钝化前使用氧化银及煤油进行处理，可以提升喷漆的均匀性及粘结的牢固性。The present invention relates to an aluminum plate surface treatment process, comprising the following steps: (1), cleaning the aluminum plate; (2), passivating the aluminum plate; (3), spraying a primer; (4), spraying a top coat; the present invention When treating the aluminum plate, first use silver oxide and kerosene to wipe after cleaning, which can remove foreign matter on the surface of the aluminum plate, and can improve the uniformity of the subsequent passivation and the density of the passivation layer. After treatment, it can be Increasing the thickness of the passivation layer can greatly improve the anti-corrosion performance of the aluminum plate and the flatness of the surface of the aluminum plate after passivation; spray paint after passivation to further improve the corrosion resistance of the aluminum material and improve its aesthetics. Treatment with silver oxide and kerosene before curing can improve the uniformity of the spray paint and the firmness of the bond.
Description
技术领域 technical field
本发明属于金属表面处理领域，具体涉及一种铝板表面处理工艺。 The invention belongs to the field of metal surface treatment, in particular to an aluminum plate surface treatment process.
背景技术 Background technique
铝及铝合金是当前用途十分广泛的、最经济适用的材料之一。世界铝产量从1956年开始超过铜产量一直居有色金属之首。当前铝的产量和用量（按吨计算）仅次于钢材，成为人类应用的第二大金属；而且铝的资源十分丰富，据初步计算，铝的矿藏储存量约占地壳构成物质的8%以上。铝用途广泛，现在使用时需要进行表面处理。 Aluminum and aluminum alloys are currently one of the most economically applicable materials that are widely used. Since 1956, the world's aluminum output has surpassed that of copper, and it has always ranked first in non-ferrous metals. The current output and consumption of aluminum (calculated by ton) is second only to steel, and has become the second largest metal used by human beings; moreover, aluminum resources are very abundant. According to preliminary calculations, the mineral reserves of aluminum account for more than 8% of the earth's crust. . Aluminum is so versatile that it now requires surface treatment when used.
发明内容 Contents of the invention
本发明的目的是提供一种铝板表面处理工艺，对铝板表面进行钝化等处理，提升了铝板的防腐性能。 The purpose of the present invention is to provide a surface treatment process for aluminum plates, which can passivate the surface of the aluminum plates and improve the anti-corrosion performance of the aluminum plates.
一种铝板表面处理工艺，包括以下步骤： A surface treatment process for an aluminum plate, comprising the following steps:
（1）、将铝板表面放入浸泡槽中使用40℃、质量分数为3-4%的碳酸氢钠溶液浸泡处理60-72s，然后使用软布擦拭铝板表面，并使用清水冲洗干净； (1) Put the surface of the aluminum plate into the soaking tank and soak it in a sodium bicarbonate solution with a mass fraction of 3-4% at 40°C for 60-72s, then wipe the surface of the aluminum plate with a soft cloth and rinse it with clean water;
（2）、将步骤（1）处理好的铝板表面在30-40℃温度下烘干，然后在铝板表面均匀喷洒氧化银粉末，喷洒量为55-62g/m2，然后使用蘸有煤油的软布对喷洒有氧化银粉末的铝板进行擦拭，擦拭时的压强为0.35-0.42Mpa，擦拭时间为5-8min； (2) Dry the surface of the aluminum plate treated in step (1) at a temperature of 30-40°C, then evenly spray silver oxide powder on the surface of the aluminum plate, the spraying amount is 55-62g/m 2 , and then use a Wipe the aluminum plate sprayed with silver oxide powder with a soft cloth, the pressure when wiping is 0.35-0.42Mpa, and the wiping time is 5-8min;
（3）、将步骤（2）处理好的铝板使用28℃、质量分数为3-4%的碳酸氢钠溶液浸泡处理3-5min，然后使用去离子水清洗，去离子水温度为22-28℃； (3) Soak the aluminum plate treated in step (2) in a sodium bicarbonate solution with a mass fraction of 3-4% at 28°C for 3-5 minutes, and then wash it with deionized water at a temperature of 22-28 ℃;
(4)、将上述步骤处理好的铝板使用钝化处理液在25-32℃钝化处理25-33min； (4) Passivate the aluminum plate processed in the above steps for 25-33min at 25-32°C with a passivation treatment solution;
（5）、将钝化处理完成的铝板使用去离子水冲洗干净，在35-40℃下烘干； (5) Rinse the passivated aluminum plate with deionized water and dry it at 35-40°C;
（6）、将铝板表面使用环氧锌黄底漆喷涂，喷涂时，底漆:底漆固化剂：稀释剂的重量比例为7：2：0.2；喷涂后在35℃下烘干； (6) Spray the surface of the aluminum plate with epoxy zinc yellow primer. When spraying, the weight ratio of primer: primer curing agent: thinner is 7:2:0.2; dry at 35°C after spraying;
(7)、将铝板在50-55℃下处理10-15min，然后喷涂面漆。 (7) Treat the aluminum plate at 50-55°C for 10-15 minutes, and then spray the topcoat.
优选地，所述钝化处理液包括处理液A与处理液B，处理液A中硅烷偶联剂质量浓度为1.2-1.5%、混合胺质量浓度4.3-5.8%、二甲基甲酰胺质量浓度1.5-3%余量为水；处理液B中重铬酸钠的质量浓度为8-15%，余量为水，调节PH为4.5-6；使用时，先使用处理液A处理10-15min，然后使用处理液B处理。 Preferably, the passivation treatment solution includes treatment solution A and treatment solution B, the mass concentration of silane coupling agent in treatment solution A is 1.2-1.5%, the mass concentration of mixed amine is 4.3-5.8%, and the mass concentration of dimethylformamide is The balance of 1.5-3% is water; the mass concentration of sodium dichromate in the treatment solution B is 8-15%, the balance is water, and the pH is adjusted to 4.5-6; when using, first use the treatment solution A for 10-15min , and then treated with treatment solution B.
优选的，所述面漆按重量计由以下成分制成：聚氨酯丙烯酸酯25-30份、羟基丙烯酸树脂15-22份、水性环氧树脂12-15份、乙二醇乙醚醋酸酯15-20份、稀释剂50-65份、流平剂1-2份、固化剂1-2份、消泡剂0.5-1份。该配方的油漆喷涂在与经过氧化银处理后钝化的铝板上粘结性更好，可以防止油漆气泡、脱落。 Preferably, the topcoat is made of the following components by weight: 25-30 parts of polyurethane acrylate, 15-22 parts of hydroxyl acrylic resin, 12-15 parts of water-based epoxy resin, 15-20 parts of ethylene glycol ether acetate 50-65 parts of thinner, 1-2 parts of leveling agent, 1-2 parts of curing agent, 0.5-1 part of defoamer. The paint sprayed with this formula has better adhesion to the passivated aluminum plate after silver oxide treatment, which can prevent paint bubbles and peeling off.
所述稀释剂、流平剂、固化剂及消泡剂可以使用本领域常用试剂。 The diluent, leveling agent, curing agent and defoamer can use commonly used reagents in the art.
本发明中试剂制备时可使用少量常规助溶剂，助溶剂使用量小于5%。 A small amount of conventional co-solvents can be used during the preparation of reagents in the present invention, and the amount of co-solvents used is less than 5%.
本发明的有益效果：本发明的方法在对铝板处理时，先在清洗后使用氧化银与与煤油进行擦拭，可以除去铝板表面的异物，又能够提升后续钝化时的均匀性及钝化层的致密度，而且处理后，可以增大钝化层的厚度，大大提升铝板的防腐蚀性能及钝化后铝板表面的平整度；在钝化后再喷涂油漆，进一步提升铝材的防腐性，还可以提升其美观性，在钝化前使用氧化银及煤油进行处理，可以提升喷漆的均匀性及粘结的牢固性。 Beneficial effects of the present invention: when the method of the present invention is processing the aluminum plate, first use silver oxide and kerosene to wipe after cleaning, which can remove foreign matter on the surface of the aluminum plate, and can improve the uniformity and passivation layer of the subsequent passivation Density, and after treatment, the thickness of the passivation layer can be increased, greatly improving the anti-corrosion performance of the aluminum plate and the flatness of the surface of the aluminum plate after passivation; spray paint after passivation to further improve the corrosion resistance of the aluminum material, It can also improve its aesthetics. Before passivation, it can be treated with silver oxide and kerosene, which can improve the uniformity of painting and the firmness of bonding.
本发明中在钝化处理步骤中的温度及时间控制，对铝板的钝化处理效果有很大的影响，本发明也验证了不同温度及时间控制，在改变温度及时间的情况下，进行盐雾试验，结果显示条件改变后，盐雾试验时间缩短在100-263h范围内，说明本发明的条件控制产生极好的效果。 The temperature and time control in the passivation treatment step in the present invention have a great influence on the passivation treatment effect of the aluminum plate. The present invention has also verified different temperature and time controls. Under the situation of changing the temperature and time, the salt After the fog test, the result shows that after the condition is changed, the salt spray test time is shortened in the range of 100-263h, which shows that the condition control of the present invention produces an excellent effect.
具体实施方式 detailed description
实施例1 Example 1
一种铝板表面处理工艺，包括以下步骤： A surface treatment process for an aluminum plate, comprising the following steps:
（1）、将铝板表面放入浸泡槽中使用40℃、质量分数为3.5%的碳酸氢钠溶液浸泡处理65s，然后使用软布擦拭铝板表面，并使用清水冲洗干净； (1) Put the surface of the aluminum plate into a soaking tank and soak it in a sodium bicarbonate solution with a mass fraction of 3.5% at 40°C for 65 seconds, then wipe the surface of the aluminum plate with a soft cloth, and rinse it with clean water;
（2）、将步骤（1）处理好的铝板表面在32℃温度下烘干，然后在铝板表面均匀喷洒氧化银粉末，喷洒量为58g/m2，然后使用蘸有煤油的软布对喷洒有氧化银粉末的铝板进行擦拭，擦拭时的压强为0.4Mpa，擦拭时间为6min； (2) Dry the surface of the aluminum plate treated in step (1) at 32°C, then evenly spray silver oxide powder on the surface of the aluminum plate, the spraying amount is 58g/m 2 , and then use a soft cloth dipped in kerosene to spray Wipe the aluminum plate with silver oxide powder, the pressure when wiping is 0.4Mpa, and the wiping time is 6min;
（3）、将步骤（2）处理好的铝板使用28℃、质量分数为3-4%的碳酸氢钠溶液浸泡处理3min，然后使用去离子水清洗，去离子水温度为25℃； (3) Soak the aluminum plate treated in step (2) in a sodium bicarbonate solution with a mass fraction of 3-4% at 28°C for 3 minutes, and then wash it with deionized water at a temperature of 25°C;
(4)、将上述步骤处理好的铝板使用钝化处理液在28℃钝化处理28min； (4) Use the passivation treatment solution to passivate the aluminum plate processed in the above steps for 28 minutes at 28°C;
（5）、将钝化处理完成的铝板使用去离子水冲洗干净，在36℃下烘干； (5) Rinse the passivated aluminum plate with deionized water and dry it at 36°C;
（6）、将铝板表面使用环氧锌黄底漆喷涂，喷涂时，底漆:底漆固化剂：稀释剂的重量比例为7：2：0.2；喷涂后在35℃下烘干； (6) Spray the surface of the aluminum plate with epoxy zinc yellow primer. When spraying, the weight ratio of primer: primer curing agent: thinner is 7:2:0.2; dry at 35°C after spraying;
(7)、将铝板在50-55℃下处理10-15min，然后喷涂面漆。 (7) Treat the aluminum plate at 50-55°C for 10-15 minutes, and then spray the topcoat.
所述钝化处理液包括处理液A与处理液B，处理液A中硅烷偶联剂质量浓度为1.5%、混合胺质量浓度4.8%、二甲基甲酰胺质量浓度2%余量为水；处理液B中重铬酸钠的质量浓度为12%，余量为水，调节PH为6；使用时，先使用处理液A处理15min，然后使用处理液B处理。 The passivation treatment solution includes treatment solution A and treatment solution B, the mass concentration of silane coupling agent in treatment solution A is 1.5%, the mass concentration of mixed amine is 4.8%, the mass concentration of dimethylformamide is 2%, and the balance is water; The mass concentration of sodium dichromate in the treatment solution B is 12%, the balance is water, and the pH is adjusted to 6; when in use, first use the treatment solution A for 15 minutes, and then use the treatment solution B for treatment.
所述面漆按重量计由以下成分制成：聚氨酯丙烯酸酯28份、羟基丙烯酸树脂20份、水性环氧树脂12份、乙二醇乙醚醋酸酯16份、稀释剂55份、流平剂1.2份、固化剂1.5份、消泡剂0.75份。 The topcoat is made of the following components by weight: 28 parts of polyurethane acrylate, 20 parts of hydroxyl acrylic resin, 12 parts of water-based epoxy resin, 16 parts of ethylene glycol ethyl ether acetate, 55 parts of thinner, and 1.2 parts of leveling agent parts, curing agent 1.5 parts, defoamer 0.75 parts.
实施例2 Example 2
一种铝板表面处理工艺，包括以下步骤： A surface treatment process for an aluminum plate, comprising the following steps:
（1）、将铝板表面放入浸泡槽中使用40℃、质量分数为3.5%的碳酸氢钠溶液浸泡处理64s，然后使用软布擦拭铝板表面，并使用清水冲洗干净； (1) Put the surface of the aluminum plate into a soaking tank and soak it in a sodium bicarbonate solution with a mass fraction of 3.5% at 40°C for 64 seconds, then wipe the surface of the aluminum plate with a soft cloth and rinse it with clean water;
（2）、将步骤（1）处理好的铝板表面在32℃温度下烘干，然后在铝板表面均匀喷洒氧化银粉末，喷洒量为59g/m2，然后使用蘸有煤油的软布对喷洒有氧化银粉末的铝板进行擦拭，擦拭时的压强为0.4Mpa，擦拭时间为7min； (2) Dry the surface of the aluminum plate treated in step (1) at 32°C, then evenly spray silver oxide powder on the surface of the aluminum plate, the spraying amount is 59g/m 2 , and then use a soft cloth dipped in kerosene to spray Wipe the aluminum plate with silver oxide powder, the pressure when wiping is 0.4Mpa, and the wiping time is 7min;
（3）、将步骤（2）处理好的铝板使用28℃、质量分数为4%的碳酸氢钠溶液浸泡处理3min，然后使用去离子水清洗，去离子水温度为26℃； (3) Soak the aluminum plate treated in step (2) in a sodium bicarbonate solution with a mass fraction of 4% at 28°C for 3 minutes, and then wash it with deionized water at a temperature of 26°C;
(4)、将上述步骤处理好的铝板使用钝化处理液在28℃钝化处理30min； (4) Use the passivation treatment solution to passivate the aluminum plate processed in the above steps for 30 minutes at 28°C;
（5）、将钝化处理完成的铝板使用去离子水冲洗干净，在36℃下烘干； (5) Rinse the passivated aluminum plate with deionized water and dry it at 36°C;
（6）、将铝板表面使用环氧锌黄底漆喷涂，喷涂时，底漆:底漆固化剂：稀释剂的重量比例为7：2：0.2；喷涂后在35℃下烘干； (6) Spray the surface of the aluminum plate with epoxy zinc yellow primer. When spraying, the weight ratio of primer: primer curing agent: thinner is 7:2:0.2; dry at 35°C after spraying;
(7)、将铝板在50-55℃下处理10-15min，然后喷涂面漆。 (7) Treat the aluminum plate at 50-55°C for 10-15 minutes, and then spray the topcoat.
优选地，所述钝化处理液包括处理液A与处理液B，处理液A中硅烷偶联剂质量浓度为1.5%、混合胺质量浓度5%、二甲基甲酰胺质量浓度1.8%余量为水；处理液B中重铬酸钠的质量浓度为12%，余量为水，调节PH为5.5；使用时，先使用处理液A处理13min，然后使用处理液B处理。 Preferably, the passivation treatment liquid includes treatment liquid A and treatment liquid B, and the mass concentration of silane coupling agent in treatment liquid A is 1.5%, the mass concentration of mixed amine is 5%, and the mass concentration of dimethylformamide is 1.8%. It is water; the mass concentration of sodium dichromate in the treatment solution B is 12%, the balance is water, and the pH is adjusted to 5.5; when in use, first use the treatment solution A for 13 minutes, and then use the treatment solution B for treatment.
所述面漆按重量计由以下成分制成：聚氨酯丙烯酸酯30份、羟基丙烯酸树脂20份、水性环氧树脂14份、乙二醇乙醚醋酸酯18份、稀释剂60份、流平剂1.5份、固化剂1.6份、消泡剂0.8份。 The topcoat is made of the following components by weight: 30 parts of polyurethane acrylate, 20 parts of hydroxyl acrylic resin, 14 parts of water-based epoxy resin, 18 parts of ethylene glycol ether acetate, 60 parts of diluent, 1.5 parts of leveling agent parts, 1.6 parts of curing agent, and 0.8 parts of defoamer.
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