CN103866309A - Trivalent chromium blue-white passivation solution for treating zinc die-cast alloys - Google Patents
Trivalent chromium blue-white passivation solution for treating zinc die-cast alloys Download PDFInfo
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- CN103866309A CN103866309A CN201410134051.3A CN201410134051A CN103866309A CN 103866309 A CN103866309 A CN 103866309A CN 201410134051 A CN201410134051 A CN 201410134051A CN 103866309 A CN103866309 A CN 103866309A
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- trivalent chromium
- passivation solution
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- zinc die
- passivation
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Abstract
The invention discloses trivalent chromium blue-white passivation solution for treating zinc die-cast alloys. The trivalent chromium blue-white passivation solution comprises 0.3-0.4g/L of trivalent chromium salt, 0.05-0.1g/L of zircon salt, 0.01-0.05g/L of KAl(SO4)2.12H2O, 0.05-0.1g/L of mixed additive and the balance of water; in the trivalent chromium passivation solution, the contents of hexavalent chromium, lead, cadmium, mercury, polybrominated biphenyls (PBBs) and poly brominated diphenyl ethers (PBDEs) meet the requirements of European Union ROHS (restriction of the use of certain hazardous substances) limit standards; the trivalent chromium passivation solution is simple in production equipment and low in cost; after being treated by the trivalent chromium passivation solution, the surfaces of the zinc die-cast alloys are white and bright in colour and slightly blue-white; the neutral salt mist corrosion-resistant time of a passivation film layer is more than 96 hours. The trivalent chromium blue-white passivation solution for the zinc die-cast alloys is capable of realizing substitution for the traditional hexavalent chromium passivation solution for zinc alloys.
Description
technical field
The invention belongs to metal finishing and aseptic technic field, be specifically related to a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys.
technical background
The content of zinc in the earth's crust is 0.013 %, is important raw material metal, and its consumption and production amount, after iron, aluminium and copper, occupies the 4th.Zinc alloy is owing to having plurality of advantages, and such as fusing point is low, good fluidity, easily melting welding, soldering and plasticity-processing etc., and therefore tool has been widely used.But the passivity coefficient of zinc is lower, only 0.024, therefore under state of nature, the oxide film that zinc alloy forms is automatically loose thin inhomogeneous, make the metal under the oxidation film layer of self-assembling formation, be difficult to resist the harm of common corrosion, this produces serious influence the performance to product.Therefore,, in order to improve the surface quality of zinc alloy and to extend its work-ing life, need to carry out surface treatment to it.Passivation Treatment is processed means as a kind of important surface anticorrosive, is generally used in many metals, such as, on the metals such as aluminium, zinc, magnesium and alloy material thereof.Traditional Passivation Treatment is treatment agent mainly with the hexavalent chromium compound such as chromic acid and chromic salt greatly, and the chromate conversion coating forming on metallic surface after Passivation Treatment has good anti-corrosion performance to matrix metal.But sexavalent chrome is acknowledged as one of heavy metal of the extremely strong carcinogenic substance of a kind of toxicity and serious environment pollution, its toxicity is very large, can not natural degradation at occurring in nature; And easily, in biological and human body inner accumulated, can cause the harm of chronicity.In the ROHS of European Union instruction, expressly provide, in electronic and electrical equipment, content of 6-valence Cr ions can not exceed 1000 ppm.Compared with sexavalent chrome passivation, the topmost advantage of trivalent chromium passivation is that its toxicity only has chromic 1 %, and waste water is easy to process, and it is one of promising passivation technology of tool replacing sexavalent chrome passivation.But, the zinc die casting alloys trivalent chromium deactivating liquid generally using at present, or expensive, or the etching time of resistance to neutral salt spray is not long.Thereby be necessary to develop a kind of excellent performance, the relatively low zinc die casting alloys trivalent chromium deactivating liquid of price.
Summary of the invention
The object of the invention is to overcome shortcoming and the problem that existing zinc alloy trivalent chromium passivation technique exists, a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys is provided.Not only environmental protection of this passivating solution, with low cost, and the etching time of resistance to neutral salt spray of passivation film reaches more than 96 hours, and passivation film surface color is bright in vain, shows slightly pearl opal.
concrete technical solution of the present invention is as follows:
For the treatment of a trivalent chromium bright blue passivating solution for zinc die casting alloys, its component and content are respectively: chromic salt 0.3 ~ 0.4 g/L, zirconates 0.05 ~ 0.1 g/L, KAl (SO
4)
212H
2o 0.01 ~ 0.05 g/L, mixed additive 0.05 ~ 0.1 g/L, surplus is water.Chromic salt is Cr
2(SO
4)
36H
2o or CrCl
36H
2o, or both are arbitrarily than mixture; Zirconates is K
2zrF
6or ZrOCl
28H
2o, or both are arbitrarily than mixture; Mixed additive is (NH
4)
2moO
4, Na
2wO
42H
2o and Ce (SO
4)
24H
2o mass ratio 2:1:1 mixture.
The preparation method of a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys of the present invention is as follows: under normal temperature and pressure, by the amount of described each component, chromic salt is dissolved in to suitable quantity of water, adds while stirring zirconates and KAl (SO
4)
212H
2o, continues stirring it is dissolved completely; Then add mixed additive, stir, supply water; Then regulating the pH value of passivating solution with dilute sulphuric acid or diluted sodium hydroxide solution is 3.3 ~ 3.7, obtains the trivalent chromium bright blue passivation working fluid for the treatment of zinc die casting alloys.
The processing condition of passivating solution operation are: passivating solution working pH value 3.3 ~ 3.7, with dilution heat of sulfuric acid or diluted sodium hydroxide solution adjusting; Passivating solution working temperature is 33 ~ 37 DEG C; Passivating solution passivation time is 15 ~ 25 minutes.
The use flow process of a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys of the present invention is as follows:
(1) oil removing: zinc die casting alloys is immersed to degreaser, to remove surperficial oil stain;
(2) clean: with clear water, the degreaser of zinc alloy surface is clean;
(3) passivation: cleaned zinc die casting alloys is immersed in the trivalent chromium deactivating liquid preparing, passivating solution working pH value is 3.3 ~ 3.7, and working temperature is 33 ~ 37 DEG C, and passivation time is 15 ~ 25 minutes;
(4) clean: with clear water, the passivating solution of zinc alloy surface is clean;
(5) dry: in the hot water of 70 ~ 80 DEG C, to soak 1 minute;
(6) dry up or dry: the zinc alloy after dry is immediately dried up or dried by air gun or dehydration barrel.
Advantage of the present invention is: a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys of the present invention, and the content of its sexavalent chrome, lead, cadmium, mercury, Polybrominated biphenyl (PBBs) and Poly Brominated Diphenyl Ethers (PBDEs) all meets the requirement of the ROHS of European Union limit standard; Its production unit is simple, with low cost, suitable with similar sexavalent chrome passivating solution cost, and even lower, wastewater treatment is simpler; When use, do not change original chromic processing condition and use equipment; Bright in vain through this trivalent chromium deactivating liquid zinc die casting alloys surface color after treatment, show slightly pearl opal; The etching time of resistance to neutral salt spray of passivation film can reach more than 96 hours.Therefore, this zinc die casting alloys can realize substituting traditional zinc alloy sexavalent chrome passivating solution with trivalent chromium deactivating liquid.
Embodiment
embodiment 1
Passivating solution all adopts commercially available technical pure level starting material preparation.Take Cr
2(SO
4)
36H
2o 3 g, K
2zrF
60.5 g, KAl (SO
4)
212H
2o 0.1 g, mixed additive 0.5 g; Under normal temperature and pressure, chromic salt is dissolved in to suitable quantity of water, adds while stirring zirconates and KAl (SO
4)
212H
2o, continues stirring it is dissolved completely; Then add mixed additive, stir; Finally mend and add water to 10 L.
Operation technological process is:
(1) oil removing: zinc die casting alloys is immersed to degreaser, to remove surperficial oil stain;
(2) clean: with clear water, the degreaser of zinc alloy surface is cleaned, cleaned twice;
(3) passivation: cleaned zinc die casting alloys is immersed in the trivalent chromium deactivating liquid preparing, adjusting passivating solution working pH value is 3.3, and working temperature is 33 DEG C, and passivation time is 15 minutes;
(4) clean: with clear water, the passivating solution of zinc alloy surface is cleaned, cleaned twice;
(5) dry: in the hot water of 70 ~ 80 DEG C, to soak 1 minute;
(6) dry up or dry: the zinc alloy piece after dry is dried up with air gun immediately.
By the zinc alloy workpiece of aforesaid method processing, the passive film color and luster of its Surface Creation is bright in vain, is pearl opal; Resistance to neutral salt spray corrosion test can reach 96 hours, and corroded area is less than the method for 5 %(neutral salt spray corrosion test employing GB/T 10125-2012 " artificial atmosphere corrosion test salt-fog test " defineds).
embodiment 2
Passivating solution all adopts commercially available technical pure level starting material preparation.Take chromic salt Cr
2(SO
4)
36H
2o 4 g, K
2zrF
61 g, KAl (SO
4)
212H
2o 0.5 g, mixed additive 1 g.
Manner of formulation and operation technological process, with embodiment 1, are mixed with 10 L passivation working fluids.Regulating the pH value of passivating solution work is 3.7, and working temperature is 37 DEG C, and passivation time is 25 minutes.
By the zinc alloy workpiece of aforesaid method processing, the passive film color and luster of its Surface Creation is bright in vain, is pearl opal; Resistance to neutral salt spray corrosion test can reach 132 hours, and corroded area is less than the method for 5 %(neutral salt spray corrosion test employing GB/T 10125-2012 " artificial atmosphere corrosion test salt-fog test " defineds).
embodiment 3
Passivating solution all adopts commercially available technical pure level starting material preparation.Take chromic salt CrCl
36H
2o 3 g, ZrOCl
28H
2o 0.5 g, KAl (SO
4)
212H
2o 0.1 g, mixed additive 0.5 g.
Manner of formulation and operation technological process, with embodiment 1, are mixed with 10 L passivation working fluids.Regulating the pH value of passivating solution work is 3.3, and working temperature is 33 DEG C, and passivation time is 15 minutes.
By the zinc alloy workpiece of aforesaid method processing, the passive film color and luster of its Surface Creation is bright in vain, is pearl opal; Resistance to neutral salt spray corrosion test can reach 96 hours, and corroded area is less than the method for 5 %(neutral salt spray corrosion test employing GB/T 10125-2012 " artificial atmosphere corrosion test salt-fog test " defineds).
embodiment 4
Passivating solution all adopts commercially available technical pure level starting material preparation.Take chromic salt CrCl
36H
2o and Cr
2(SO
4)
36H
2each 2 g of O, ZrOCl
28H
2o and K
2zrF
6each 0.5 g, KAl (SO
4)
212H
2o 0.5 g, mixed additive 1 g.
Manner of formulation and operation technological process, with embodiment 1, are mixed with 10 L passivation working fluids.Regulating the pH value of passivating solution work is 3.7, and working temperature is 37 DEG C, and passivation time is 25 minutes.
By the zinc alloy workpiece of aforesaid method processing, the passive film color and luster of its Surface Creation is bright in vain, is pearl opal; Resistance to neutral salt spray corrosion test can reach 132 hours, and corroded area is less than the method for 5 %(neutral salt spray corrosion test employing GB/T 10125-2012 " artificial atmosphere corrosion test salt-fog test " defineds).
embodiment 5
Passivating solution all adopts commercially available technical pure level starting material preparation.Take chromic salt CrCl
36H
2o and Cr
2(SO
4)
36H
2each 2 g of O, ZrOCl
28H
2o and K
2zrF
6each 0.5 g, KAl (SO
4)
212H
2o 0.5 g, mixed additive 1 g.
Manner of formulation and operation technological process, with embodiment 1, are mixed with 10 L passivation working fluids.Regulating the pH value of passivating solution work is 3.5, and working temperature is 35 DEG C, and passivation time is 20 minutes.
By the zinc alloy workpiece of aforesaid method processing, the passive film color and luster of its Surface Creation is bright in vain, is pearl opal; Resistance to neutral salt spray corrosion test can reach 108 hours, and corroded area is less than the method for 5 %(neutral salt spray corrosion test employing GB/T 10125-2012 " artificial atmosphere corrosion test salt-fog test " defineds).
Claims (2)
1. for the treatment of a trivalent chromium bright blue passivating solution for zinc die casting alloys, it is characterized in that its component and content are respectively: chromic salt 0.3 ~ 0.4 g/L, zirconates 0.05 ~ 0.1 g/L, KAl (SO
4)
212H
2o 0.01 ~ 0.05 g/L, mixed additive 0.05 ~ 0.1 g/L, surplus is water; Mixed additive is (NH
4)
2moO
4, Na
2wO
42H
2o and Ce (SO
4)
24H
2o mass ratio 2:1:1 mixture.
2. a kind of trivalent chromium bright blue passivating solution for the treatment of zinc die casting alloys according to claim 1, is characterized in that chromic salt is Cr
2(SO
4)
36H
2o or CrCl
36H
2o, or both are arbitrarily than mixture; Zirconates is K
2zrF
6or ZrOCl
28H
2o, or both are arbitrarily than mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134051.3A CN103866309B (en) | 2014-04-04 | 2014-04-04 | A kind of trivalent blue-white chromating liquid for the treatment of zinc die casting alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134051.3A CN103866309B (en) | 2014-04-04 | 2014-04-04 | A kind of trivalent blue-white chromating liquid for the treatment of zinc die casting alloys |
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| CN103866309A true CN103866309A (en) | 2014-06-18 |
| CN103866309B CN103866309B (en) | 2016-03-16 |
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ID=50905304
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141123A (en) * | 2014-07-24 | 2014-11-12 | 深圳市鑫明达环保科技有限公司 | High corrosion resistance passivation solution for zinc alloy die castings and passivation method |
| CN106756955A (en) * | 2016-12-07 | 2017-05-31 | 济南德锡科技有限公司 | A kind of trivalent blue-white chromating concentrate of highly corrosion resistant and preparation method thereof |
| CN109518174A (en) * | 2019-01-10 | 2019-03-26 | 廊坊师范学院 | The preparation process of coatings for aluminum materials front surface treatment fluid |
| CN112024337A (en) * | 2020-08-03 | 2020-12-04 | 荆大（荆州）汽车配件有限公司 | Process for coating epoxy resin on surface of galvanized pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858303A (en) * | 2006-06-09 | 2006-11-08 | 广东多正化工科技有限公司 | Normal temperature passivated zinc coating trivalent chromium color passivating agent |
| CN101400825A (en) * | 2006-03-08 | 2009-04-01 | 日本油漆株式会社 | Metal surface treating agent |
| CN102002704A (en) * | 2010-11-05 | 2011-04-06 | 西南大学 | Trivalent chromium natural colour passivation solution for processing aluminium alloy |
| CN102041497A (en) * | 2009-10-13 | 2011-05-04 | 北京中科三环高技术股份有限公司 | Trivalent-chromium blue-white passivator for zinc-plated permanent magnetic material and passivation method thereof |
| CN103132068A (en) * | 2011-11-29 | 2013-06-05 | 重庆点石金属表面处理有限公司 | Trivalent chromium concentrated blue and white zinc passivant and passivation method by means of blue and white zinc passivant |
-
2014
- 2014-04-04 CN CN201410134051.3A patent/CN103866309B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400825A (en) * | 2006-03-08 | 2009-04-01 | 日本油漆株式会社 | Metal surface treating agent |
| CN1858303A (en) * | 2006-06-09 | 2006-11-08 | 广东多正化工科技有限公司 | Normal temperature passivated zinc coating trivalent chromium color passivating agent |
| CN102041497A (en) * | 2009-10-13 | 2011-05-04 | 北京中科三环高技术股份有限公司 | Trivalent-chromium blue-white passivator for zinc-plated permanent magnetic material and passivation method thereof |
| CN102002704A (en) * | 2010-11-05 | 2011-04-06 | 西南大学 | Trivalent chromium natural colour passivation solution for processing aluminium alloy |
| CN103132068A (en) * | 2011-11-29 | 2013-06-05 | 重庆点石金属表面处理有限公司 | Trivalent chromium concentrated blue and white zinc passivant and passivation method by means of blue and white zinc passivant |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141123A (en) * | 2014-07-24 | 2014-11-12 | 深圳市鑫明达环保科技有限公司 | High corrosion resistance passivation solution for zinc alloy die castings and passivation method |
| CN106756955A (en) * | 2016-12-07 | 2017-05-31 | 济南德锡科技有限公司 | A kind of trivalent blue-white chromating concentrate of highly corrosion resistant and preparation method thereof |
| CN106756955B (en) * | 2016-12-07 | 2019-04-12 | 济南德锡科技有限公司 | A kind of trivalent blue-white chromating concentrate of highly corrosion resistant and preparation method thereof |
| CN109518174A (en) * | 2019-01-10 | 2019-03-26 | 廊坊师范学院 | The preparation process of coatings for aluminum materials front surface treatment fluid |
| CN112024337A (en) * | 2020-08-03 | 2020-12-04 | 荆大（荆州）汽车配件有限公司 | Process for coating epoxy resin on surface of galvanized pipe |
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| CN103866309B (en) | 2016-03-16 |
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