CN105316666A - Contamination-resistant aluminum alloy chromium-free passivating agent and preparation method thereof - Google Patents
Contamination-resistant aluminum alloy chromium-free passivating agent and preparation method thereof Download PDFInfo
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- CN105316666A CN105316666A CN201510735890.5A CN201510735890A CN105316666A CN 105316666 A CN105316666 A CN 105316666A CN 201510735890 A CN201510735890 A CN 201510735890A CN 105316666 A CN105316666 A CN 105316666A
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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
- 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
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Abstract
The invention discloses a contamination-resistant aluminum alloy chromium-free passivating agent and a preparation method thereof. The contamination-resistant aluminum alloy chromium-free passivating agent is prepared from, by weight, 5-10 parts of 30-40% hexafluorotitanic acid, 5-10 parts of 40-45% hexafluorozirconic acid, 1-2 parts of sodium fluoride, 1-2 parts of 65-70% nitric acid, 1-2 parts of nonylphenol polyoxyethylene ether, 0.1-0.2 part of polypropylene oxide ethylene oxide glyceryl ether, 30-50 parts of 50-60% polytetrafluoroethylene emulsion, 1-2 parts of polyvinylpyrrolidone, 2-4 parts of polyaspartic acid, 50-100 parts of coalescing agents and 800-1000 parts of water. According to the aluminum alloy passivating agent, a compact film of a net structure can be formed on the surface of aluminum alloy, excellent strength, tenacity and adhesive capacity are achieved, and the corrosion resistance is good; meanwhile, the contamination resistance is good, stains such as handprint and oil stains are avoided, cleaning is easy, the protection effect is good, environment pollution can be reduced, and good economic benefits and social benefits are achieved.
Description
Technical field
The present invention relates to aluminium alloy passivating technique field, particularly relate to a kind of stain resistant aluminium alloy non-chromium passivator and preparation method thereof.
Background technology
Aluminium alloy has many excellent performances, is widely used in multiple fields such as communications and transportation, packaging vessel, aerospace, household electrical appliance, machinofacture, architectural shape, telecommunications.But the poor-performings such as the erosion resistance of aluminium alloy, wear resistance, hardness, be in use easily corroded, therefore aluminium section bar has to pass through effective surface treatment before application, to avoid or to reduce corrosion.
Chromating process is as the most frequently used aluminum alloy surface treatment technology, have easy to use, cheap, corrosion resistance nature and the good advantage of decorate properties, but the sexavalent chrome toxicity in treatment soln is large, environmental pollution serious, is limited by multinational appearance policies and regulations or prohibit the use.Therefore, chromium-free deactivation system is sought very necessary.Wherein titanium zirconium base passivating technique has that technique is simple, good stability, low cost and other advantages, but its erosion resistance and sticking power are not as chromating process, limit its application.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of stain resistant aluminium alloy non-chromium passivator, has excellent adhesive ability and corrosion resistance nature, and contaminated resistance is good simultaneously, and the spots such as tack-free print, greasy dirt, easy to clean, protected effect is good.
The present invention is achieved by the following technical solutions:
A kind of stain resistant aluminium alloy non-chromium passivator, it is obtained by the raw material of following weight parts:
30-40% hydrofluotitanic acid 5-10,40-45% fluorine zirconic acid 5-10, Sodium Fluoride 1-2,65-70% nitric acid 1-2, polyoxyethylene nonylphenol ether 1-2, polyoxypropylene ethylene oxide glyceryl ether 0.1-0.2,50-60% ptfe emulsion 30-50, polyvinylpyrrolidone 1-2, poly aspartic acid 2-4, film coalescence aid 50-100, water 800-1000;
Wherein film coalescence aid is made up of the raw material of following weight part: polyvinyl alcohol 1-2, bisphenol A type epoxy resin 10-15, glyceryl monostearate 0.5-1, vinylformic acid 4-6, carbon nanotube 1-2, butyl glycol ether 10-15, diethanolamine 5-10, dibenzoyl peroxide 0.2-0.4, water 60-80; Polyvinyl alcohol, bisphenol A type epoxy resin and glyceryl monostearate are added 85-90 DEG C of stirring 4-6h in reaction vessel by the preparation method of film coalescence aid, first add butyl glycol ether 120-140 DEG C to stir until melting, add dibenzoyl peroxide, vinylformic acid and carbon nanotube 70-80 DEG C of reaction 2-4h again, finally add all the other raw materials and stir 40-50 DEG C of reaction 0.5-1h, pH is adjusted to 6-7, obtains final product.
A preparation method for stain resistant aluminium alloy non-chromium passivator, comprises the following steps:
(1) raw material is taken by weight, first hydrofluotitanic acid, fluorine zirconic acid, poly aspartic acid, Sodium Fluoride and nitric acid are added to the water and stir, then polyoxyethylene nonylphenol ether and polyoxypropylene ethylene oxide glyceryl ether 600-1000r/min stirring 10-15min is added, finally add polyvinylpyrrolidone 60-80 DEG C and stir 0.5-1h, after cooling, pH is adjusted to 4-4.5, obtains mixed solution;
(2) after being mixed with all the other raw materials by the mixed solution in (1), 50-60 DEG C is stirred 0.5-1h, and cooled and filtered removing impurity, obtains stain resistant aluminium alloy non-chromium passivator.
Advantage of the present invention is:
The present invention introduces polyvinyl alcohol in the epoxy, vinylformic acid and carbon nano-tube modification agent obtain film coalescence aid, bonding titanium zirconium base passivator, and with all the other raw materials carry out composite after obtain composite type aluminum alloy passivator, the film with cancellated densification can be formed in aluminum alloy surface, compared with the film formed with conventional titanium zirconium base passivator, there is excellent intensity, toughness and adhesive ability, corrosion resistance nature is good, contaminated resistance is good simultaneously, tack-free print, the spots such as greasy dirt, easy to clean, protected effect is good, there is good economic benefit and social benefit.
Embodiment
A kind of stain resistant aluminium alloy non-chromium passivator, it is obtained by the raw material of following weight parts:
40% hydrofluotitanic acid 5,40% fluorine zirconic acid 5, Sodium Fluoride 1,65% nitric acid 1, polyoxyethylene nonylphenol ether 1, polyoxypropylene ethylene oxide glyceryl ether 0.1,50% ptfe emulsion 30, polyvinylpyrrolidone 1, poly aspartic acid 2, film coalescence aid 50, water 800;
Wherein film coalescence aid is made up of the raw material of following weight part: polyvinyl alcohol 1, bisphenol A type epoxy resin 10, glyceryl monostearate 0.5, vinylformic acid 4, carbon nanotube 1, butyl glycol ether 10, diethanolamine 5, dibenzoyl peroxide 0.2, water 60; Polyvinyl alcohol, bisphenol A type epoxy resin and glyceryl monostearate are added 85 DEG C of stirring 4h in reaction vessel by the preparation method of film coalescence aid, first add butyl glycol ether 120 DEG C to stir until melting, add dibenzoyl peroxide, vinylformic acid and carbon nanotube 70 DEG C reaction 2h again, finally add all the other raw materials and stir 40 DEG C of reaction 0.5h, pH is adjusted to 7, obtains final product.
A preparation method for stain resistant aluminium alloy non-chromium passivator, comprises the following steps:
(1) raw material is taken by weight, first hydrofluotitanic acid, fluorine zirconic acid, poly aspartic acid, Sodium Fluoride and nitric acid are added to the water and stir, then polyoxyethylene nonylphenol ether and polyoxypropylene ethylene oxide glyceryl ether 600r/min stirring 10min is added, finally add polyvinylpyrrolidone 60 DEG C and stir 0.5h, after cooling, pH is adjusted to 4, obtains mixed solution;
(2) mixed solution in (1) is mixed latter 50 DEG C with all the other raw materials and stir 0.5h, cooled and filtered removing impurity, obtains stain resistant aluminium alloy non-chromium passivator.
Carry out Passivation Treatment with above-mentioned obtained chrome-free tanning agent to aluminium alloy, passivating conditions is 50 DEG C, 3min, then dries 15min in 90 DEG C, and it is as follows to carry out the performance test results:
| Performance project | Chromium-free passivating film |
| Sticking power | 0 grade |
| Shock test | Zero defect |
| Humid test (1000h) | Zero defect |
| Neutral salt spray test (168h) | Zero defect |
| Outdoor exposure 1 year | Zero defect |
Claims (2)
1. a stain resistant aluminium alloy non-chromium passivator, is characterized in that, it is obtained by the raw material of following weight parts:
30-40% hydrofluotitanic acid 5-10,40-45% fluorine zirconic acid 5-10, Sodium Fluoride 1-2,65-70% nitric acid 1-2, polyoxyethylene nonylphenol ether 1-2, polyoxypropylene ethylene oxide glyceryl ether 0.1-0.2,50-60% ptfe emulsion 30-50, polyvinylpyrrolidone 1-2, poly aspartic acid 2-4, film coalescence aid 50-100, water 800-1000;
Described film coalescence aid is made up of the raw material of following weight part: polyvinyl alcohol 1-2, bisphenol A type epoxy resin 10-15, glyceryl monostearate 0.5-1, vinylformic acid 4-6, carbon nanotube 1-2, butyl glycol ether 10-15, diethanolamine 5-10, dibenzoyl peroxide 0.2-0.4, water 60-80; Polyvinyl alcohol, bisphenol A type epoxy resin and glyceryl monostearate are added 85-90 DEG C of stirring 4-6h in reaction vessel by the preparation method of film coalescence aid, first add butyl glycol ether 120-140 DEG C to stir until melting, add dibenzoyl peroxide, vinylformic acid and carbon nanotube 70-80 DEG C of reaction 2-4h again, finally add all the other raw materials and stir 40-50 DEG C of reaction 0.5-1h, pH is adjusted to 6-7, obtains final product.
2. the preparation method of a kind of stain resistant aluminium alloy non-chromium passivator according to claim 1, is characterized in that, comprise the following steps:
(1) raw material is taken by weight, first hydrofluotitanic acid, fluorine zirconic acid, poly aspartic acid, Sodium Fluoride and nitric acid are added to the water and stir, then polyoxyethylene nonylphenol ether and polyoxypropylene ethylene oxide glyceryl ether 600-1000r/min stirring 10-15min is added, finally add polyvinylpyrrolidone 60-80 DEG C and stir 0.5-1h, after cooling, pH is adjusted to 4-4.5, obtains mixed solution;
(2) after being mixed with all the other raw materials by the mixed solution in (1), 50-60 DEG C is stirred 0.5-1h, and cooled and filtered removing impurity, obtains stain resistant aluminium alloy non-chromium passivator.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805801A (en) * | 2017-12-08 | 2018-03-16 | 安徽雷萨重工机械有限公司 | A kind of aluminum alloy surface passivating solution |
| CN109440096A (en) * | 2018-10-23 | 2019-03-08 | 武汉材料保护研究所有限公司 | A kind of preparation method of the nano combined chemical composition coating of aluminum alloy surface |
| CN109468626A (en) * | 2018-12-20 | 2019-03-15 | 中建三局第建设工程有限责任公司 | A kind of aluminum alloy mould plate surface layer passivating solution and preparation method thereof and passivation process |
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| CN101701336A (en) * | 2009-11-26 | 2010-05-05 | 芜湖市瑞杰环保材料科技有限公司 | Environment-friendly metal surface treating agent and using method thereof |
| CN102409332A (en) * | 2011-12-06 | 2012-04-11 | 中国科学院金属研究所 | Corrosion-contamination resistant chemical conversion agent and method for preparing chromium-free chemical conversion film |
| CN103103512A (en) * | 2011-11-15 | 2013-05-15 | 广东兴发铝业有限公司 | Rare-earth modified Ti-Zr chemical passivation solution for surface treatment of aluminium profiles and using method of rare-earth modified Ti-Zr chemical passivation solution |
| CN104372323A (en) * | 2014-11-13 | 2015-02-25 | 无锡伊佩克科技有限公司 | Aluminum alloy chromium-free water-based passivator and preparation method thereof |
| CN104561970A (en) * | 2014-12-31 | 2015-04-29 | 苏州禾川化学技术服务有限公司 | Corrosion-resistant magnesium aluminum alloy chromium-free passivation solution |
| CN104928670A (en) * | 2015-05-20 | 2015-09-23 | 广东坚美铝型材厂（集团）有限公司 | Method of preparing conversion film on surface of aluminum alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107805801A (en) * | 2017-12-08 | 2018-03-16 | 安徽雷萨重工机械有限公司 | A kind of aluminum alloy surface passivating solution |
| CN109440096A (en) * | 2018-10-23 | 2019-03-08 | 武汉材料保护研究所有限公司 | A kind of preparation method of the nano combined chemical composition coating of aluminum alloy surface |
| CN109440096B (en) * | 2018-10-23 | 2021-02-09 | 武汉材料保护研究所有限公司 | Preparation method of aluminum alloy surface nano composite chemical conversion coating |
| CN109468626A (en) * | 2018-12-20 | 2019-03-15 | 中建三局第建设工程有限责任公司 | A kind of aluminum alloy mould plate surface layer passivating solution and preparation method thereof and passivation process |
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Application publication date: 20160210 |