CN103233214B - Galvanizing chrome-free colored passivator - Google Patents
Galvanizing chrome-free colored passivator Download PDFInfo
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- CN103233214B CN103233214B CN201310159138.1A CN201310159138A CN103233214B CN 103233214 B CN103233214 B CN 103233214B CN 201310159138 A CN201310159138 A CN 201310159138A CN 103233214 B CN103233214 B CN 103233214B
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- passivator
- chrome
- free
- free colored
- chromium
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Abstract
The invention relates to a galvanizing chrome-free colored passivator which is prepared by proportionally dissolving cerium nitrate, sodium citrate, cobalt nitrate and the like and evenly mixing. The galvanizing chrome-free colored passivator can obviously enhance the corrosion resistance of the coating and endow the coating with bright color.
Description
Technical field
The present invention relates to galvanized chromium-free color passivating agent, particularly relate to a kind of composition of galvanized chromium-free color passivating agent, the effect of each composition and compound method.
Background technology
The pollution of electroplating industry is very serious, and it mainly comes from passivating solution.The Cr contained in traditional chromium hydrochlorate passivating solution
6+have toxicity, environmental pollution is serious, and it is applied in and has been subject to strict restriction both at home and abroad.According to GB-2008 " plating pollutant emission standard ", to Pd, Hg, Cd, Cr
6+, poly-6 kinds of first kind pollutants such as dibromodiphenyl ether and poly-bromo biphenyl discharge standard had lower restriction, European Union " about prohibitting the use some Hazardous Substances Directive in electronic electric equipment " (ROHS) of enforcement in 1 day July in 2006, forbid containing 6 kinds of harmful substances such as Cr VIs in electronics that EU market is thrown in and electric equipment, so the products substitution Cr VI passivation of environment-friendly type becomes an urgent demand.
The passivation of environment-friendly type mainly adopts trivalent chromium and chromium-free deactivation both direction.Chromium-free deactivation system has titanate, molybdate, tungstates, rare earth, silicate, these chromium-free systems passivating film asepsis environment-protectings at present, corrosion resistance and outward appearance all improve a lot in recent years, meet common handware plating requirement, so non-chromium inactivating technique industrially has wide practical use.
Summary of the invention
The present invention, in order to improve zinc coating passivation film asepsis environment-protecting, makes in passivating solution not containing Cr simultaneously
6+, Cr
3+and invented galvanized chromium-free color passivating agent.
The present invention adopts the article composition galvanized chromium-free color passivating agents such as cerous nitrate, natrium citricum, cobalt nitrate.
Concrete preparation method of the present invention comprises the step of following order:
A. the natrium citricum of amount of calculation is poured in a small amount of water, stir and make it fully dissolve;
B. the cerous nitrate of amount of calculation is slowly added, stir and make it fully dissolve;
C. the cobalt nitrate of amount of calculation is added, stir;
F. by after the water constant volume of amount of calculation, leave standstill 10 minutes, adjust pH in 1 ~ 2 scope with nitric acid.
Gained galvanized chromium-free color passivating agent of the present invention, for clarification is in shallow carmine liquid.
Description of test
The present invention, by after zinc-plated experiment, implements Passivation Treatment in Chrome-free color passivation solution, after the process of different time, observes the color and luster of coating, and carries out neutral salt spray test and measure its corrosion resisting property.
Detailed description of the invention
The concrete preparation process of the present embodiment is as follows:
A. general sylvite galvanized solution is prepared, and adjusted to ph, electroplate.
B. take out sample after certain hour, in the nitric acid of 3%, carry out Passivation Treatment after bright dipping, passivation time is 8 ~ 20s.
C. observe the color and luster transforming rete, and carry out neutral salt spray test.
Galvanized chromium-free color passivating agent technological specification is:
Note: when there being stirring, passivation time can shorten.
Claims (1)
1. be applied to the Chrome-free color passivating agent of zinc coat, it is characterized in that the raw material of passivator is composed as follows: containing cerous nitrate 35 ~ 55g/L, natrium citricum 15 ~ 25g/L, cobalt nitrate 15 ~ 25g/L, all the other are water; When Chrome-free color passivating agent uses, pH value maintains in 1 ~ 2 scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159138.1A CN103233214B (en) | 2013-04-16 | 2013-04-16 | Galvanizing chrome-free colored passivator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159138.1A CN103233214B (en) | 2013-04-16 | 2013-04-16 | Galvanizing chrome-free colored passivator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103233214A CN103233214A (en) | 2013-08-07 |
| CN103233214B true CN103233214B (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310159138.1A Expired - Fee Related CN103233214B (en) | 2013-04-16 | 2013-04-16 | Galvanizing chrome-free colored passivator |
Country Status (1)
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| CN (1) | CN103233214B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506679A (en) * | 2015-12-17 | 2016-04-20 | 山东建筑大学 | Low-toxicity gold imitation method for domestic galvanized sheets |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701337A (en) * | 2009-06-26 | 2010-05-05 | 上海申和热磁电子有限公司 | Chemical Ni-plating layer Cr-free passivation after treating agent and related after treatment technique |
| CN101906629A (en) * | 2010-08-09 | 2010-12-08 | 哈尔滨工业大学 | Blue write chromate-free passivation liquid of electrogalvanized layer and method for passivating electrogalvanized layer by adopting same |
| CN102199767A (en) * | 2011-05-09 | 2011-09-28 | 宏正（福建）化学品有限公司 | Cr-free F-free color passivation solution and passivation method for electroplated Zn-Ni alloy plating layer |
| CN102304711A (en) * | 2011-09-28 | 2012-01-04 | 浙江工贸职业技术学院 | Environmentally friendly chromium-free passivation solution for aluminum and aluminum alloy surface and application thereof |
| CN102337532A (en) * | 2011-07-11 | 2012-02-01 | 武汉迪赛高科技研究发展有限公司 | Chromium-free passivation liquid applied to surface of zinc-coated layer |
-
2013
- 2013-04-16 CN CN201310159138.1A patent/CN103233214B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701337A (en) * | 2009-06-26 | 2010-05-05 | 上海申和热磁电子有限公司 | Chemical Ni-plating layer Cr-free passivation after treating agent and related after treatment technique |
| CN101906629A (en) * | 2010-08-09 | 2010-12-08 | 哈尔滨工业大学 | Blue write chromate-free passivation liquid of electrogalvanized layer and method for passivating electrogalvanized layer by adopting same |
| CN102199767A (en) * | 2011-05-09 | 2011-09-28 | 宏正（福建）化学品有限公司 | Cr-free F-free color passivation solution and passivation method for electroplated Zn-Ni alloy plating layer |
| CN102337532A (en) * | 2011-07-11 | 2012-02-01 | 武汉迪赛高科技研究发展有限公司 | Chromium-free passivation liquid applied to surface of zinc-coated layer |
| CN102304711A (en) * | 2011-09-28 | 2012-01-04 | 浙江工贸职业技术学院 | Environmentally friendly chromium-free passivation solution for aluminum and aluminum alloy surface and application thereof |
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| CN103233214A (en) | 2013-08-07 |
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