CN1162571C - Electroplasting solution for electrodeposition of bright ZnFe alloy with low Fe content from sulfate system - Google Patents
Electroplasting solution for electrodeposition of bright ZnFe alloy with low Fe content from sulfate system Download PDFInfo
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- CN1162571C CN1162571C CNB011316284A CN01131628A CN1162571C CN 1162571 C CN1162571 C CN 1162571C CN B011316284 A CNB011316284 A CN B011316284A CN 01131628 A CN01131628 A CN 01131628A CN 1162571 C CN1162571 C CN 1162571C
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- brightening agent
- alloy
- iron content
- agent
- bright
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Abstract
The present invention provides a plating liquid for preparing bright zinc-iron alloy with a low iron content (less than 1 wt%) from a sulfate system, which belongs to the technical field of electrodepositing protective alloy plating layers. The brightening agent of the prescription is mainly prepared from benzalacetone, polyglycol-octyl-phenyl ether, sodium benzoate, NN-dimethylaniline and absolute alcohol. The iron content of the plating layers is from 0.3 to 0.85 wt%, and the iron content in the zinc-iron alloy plating layers can be regulated by regulating the ratio of Zn<2+> to Fe<2+>. The preparation method is simple and reasonable, the PH value of the plating liquid using citric acid as a buffering agent is stable, and the environment pollution is less. The product has the advantages of bright and smooth surface, and stable quality. The plating liquid can be used for the protective treatment and the ornamental treatment for the surfaces of plate materials and belt materials.
Description
Technical field
The invention belongs to the technical field for preparing the protective alloy layer with electrodip process.
Background technology
Zn-Fe alloy coating is a kind of protective alloy layer, has excellent corrosion resisting performance, but re-workability, weldability, strong paint film adhesive ability and good creep resisting ability.Therefore, in industrial production, be widely used, especially be mainly used in industrial circles such as automobile, aviation and electronics to slow down the corrosion of saline and alkaline and dust storm weather metal part surface in American-European and Japan and other countries.Usually the height by iron level can be divided into high ferro Zn-Fe alloy coating and low iron Zn-Fe alloy coating; High iron alloy is easy to carry out bonderizing, have good processing and the paint film adhesive ability, and the low iron content zn-fe alloy is easy to carry out Passivation Treatment, and the corrosion resistance of alloy layer can be greatly improved and decorate properties also can be improved like this.Be broadly divided into for the zn-fe alloy of low iron content character: prussiate system, non-cyanide alkali system and acid chlorization objects system by electroplate liquid.The prussiate system is because toxicity seriously polluted to environment greatly except that the electroplating processes that is used for important parts, is eliminated basically.The non-cyanide alkali system has reasonable dispersive ability and covering power, yet current efficiency and sedimentation velocity are lower and control requires relatively stricter to additive.Acid chlorization objects system production efficiency is than higher, and is fairly simple to the control of brightener, can bear big current density so sedimentation velocity is fast, but dispersive ability and covering power is poor.Yet do not see special report from sulfate system galvanic deposit low iron content zn-fe alloy technology.
Summary of the invention
The object of the present invention is to provide a kind of being used for from the plating bath of sulfate system galvanic deposit low iron content light zinc-iron alloy.
The objective of the invention is to realize by following approach: be used for from the plating bath of sulfate system galvanic deposit low iron content light zinc-iron alloy, it comprises and contains Zn
2+And Fe
2+Vitriol, brightening agent, buffer reagent citric acid and complexing agent Citrate trianion, above-mentioned brightening agent is made up of main brightener, carrier brightening agent and brightening agent auxiliary agent, wherein main brightener is benzylideneacetone C
6H
4OCH
3CHO, carrier brightening agent are Triton X-100 R-C
6H
4O (C
2H
4)
10H and dehydrated alcohol CH
3CH
2OH, brightening agent auxiliary agent are Sodium Benzoate C
6H
5COONa and NN-xylidine C
6H
5N (CH
3)
2
The weight ratio of each composition and water is in the brightening agent, benzylideneacetone C
6H
4OCH
3CHO: Triton X-100 R-C
6H
4O (C
2H
4)
10H: dehydrated alcohol CH
3CH
2OH: Sodium Benzoate C
6H
5COONa: NN-xylidine C
6H
5N (CH
3)
2: water equals 0.5～3: 6.5～22: 3.5～8: 0.5～2.5: 0.3～2: 100.
Prescription of the present invention is simple, and bath stability and damage ratio are less, has not only kept the advantage that traditional vitriol is electroplated high current efficiency and higher sedimentation velocity, and suitably improves the dispersive ability and the covering power of plating bath.Utilize resultant Zn-Fe alloy coating of the present invention and matrix bond good, not decortication and foaming phenomenon.Its key distinction in traditional sulfate zinc plating and zn-fe alloy coating be coating surface very light is fine and close, crystallization is tiny, and the surface has very high preferred orientation, coating has good corrosion resistance and is easy to carry out Passivation Treatment.The present invention has not only kept the characteristics of chloride system electrodeposited zn-fe alloy technology, and suitable improvement the covering power and the dispersive ability of plating bath, improved the stability of plating bath.
Embodiment
The present invention mainly is made up of two portions, the preparation of the synthetic and electroplate liquid of additive.
At first, synthetic brightener TF is dissolved in 120g Triton X-100 R-C with the 13g benzylideneacetone under the condition of heating
6H
4O (C
2H
4)
10Among the H, dissolving back adding 65g dehydrated alcohol is incubated 7 hours down at 30 ℃ fully, so that main brightener dissolving fully in carrier; Be dissolved in the 11g Sodium Benzoate in the 100ml hot water then and add the 16gNN-xylidine, make the two uniform dissolving; At last above-mentioned two kinds of solution are mixed, and add water to 1 liter, the quality percentage composition that gets final product is 21% brightening agent.One termination of main brightener aromatic ring has aldehyde radical, also is connected to carbonyl simultaneously, to increase its wetting ability; The main effect of main brightener is to form one deck adsorption film on negative electrode, and this layer adsorption film increased metal ion the resistance of reduce deposition takes place on negative electrode, thereby improved the luminance brightness and the density of coating.Carrier brightening agent of the present invention is mainly Triton X-100, and its wetting ability is made of jointly ehter bond and hydroxyl, mainly (O-) bring into play wetting ability, and big more its wetting ability of condensation degree is good more by ehter bond; Dehydrated alcohol is as assistant carrier, and its hydrophilic radical is a hydroxyl.The brightening agent auxiliary agent is made up of Sodium Benzoate and NN-xylidine, and it mainly acts on is to widen current density range, main brightener is distributed in electrode process more become evenly, reduces the coating decortication and the foaming that are caused by the coating internal stress, to guarantee the quality of coating.
Secondly, volume is 1 liter electroplate liquid preparation.Weigh 100g zinc sulfate and 10g citric acid with 1/2nd volume hot water dissolving; Weigh 6.5g ferrous sulfate and 20g Trisodium Citrate dissolved in distilled water then, above-mentioned two kinds of solution are mixed after making citrate ion and the complete complexing of ferrous ion in static 4 hours with 1/3rd volumes; Under agitation slowly add the brightener that 16ml has prepared, add distilled water and make the volume of solution reach the volume of regulation; At last, adjust about the pH value to 2.5 of plating bath with rare citric acid solution.It is 3.5A/dm with current density that static several hrs just can be 20 ℃ in temperature
2Condition under electroplate, just can obtain iron level is the up-to-standard zn-fe alloy coating in the 0.65wt% left and right sides.Temperature has certain influence to the quality of coating, when temperature relatively up to the time to 40 ℃ of left and right sides, additive has part and separates out and make plating bath become muddy, thereby makes the fragility of coating become big, reduce with the bonding force of matrix; So general temperature is controlled within 10 ℃～30 ℃ scopes, wherein temperature is best when room temperature.Current density has significant effects to the quality of current efficiency and coating, and current density range of the present invention is wideer than the current density range of alkalescence and some other system, can be taken at 1.5～5.5A/dm
2Within the scope.The height of iron level mainly is subjected to Zn in the plating bath in the coating
2+With Fe
2+The influence of ratio, Zn in the control electroplate liquid
2+With Fe
2+Ratio within 12～20 scopes, can guarantee to obtain iron-holder within 0.4～0.85wt% scope, the fine and close up-to-standard Zn-Fe alloy coating of surface-brightening.
Claims (2)
1. be used for from the plating bath of sulfate system galvanic deposit low iron content light zinc-iron alloy, it comprises and contains Zn
2+And Fe
2+Vitriol, brightening agent, buffer reagent citric acid and complexing agent Citrate trianion, it is characterized in that above-mentioned brightening agent is made up of main brightener, carrier brightening agent and brightening agent auxiliary agent, wherein main brightener is benzylideneacetone C
6H
4OCH
3CHO, carrier brightening agent are Triton X-100 R-C
6H
4O (C
2H
4)
10H and dehydrated alcohol CH
3CH
2OH, brightening agent auxiliary agent are Sodium Benzoate C
6H
5COONa and NN-xylidine C
6H
5N (CH
3)
2
2. be used for from the plating bath of sulfate system galvanic deposit low iron content light zinc-iron alloy by claim 1 is described, it is characterized in that: the weight ratio of each composition and water is in the brightening agent, benzylideneacetone C
6H
4OCH
3CHO: Triton X-100 R-C
6H
4O (C
2H
4)
10H: dehydrated alcohol CH
3CH
2OH: Sodium Benzoate C
6H
5COONa: NN-xylidine C
6H
5N (CH
3)
2: water equals 0.5～3: 6.5～22: 3.5～8: 0.5～2.5: 0.3～2: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011316284A CN1162571C (en) | 2001-12-20 | 2001-12-20 | Electroplasting solution for electrodeposition of bright ZnFe alloy with low Fe content from sulfate system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011316284A CN1162571C (en) | 2001-12-20 | 2001-12-20 | Electroplasting solution for electrodeposition of bright ZnFe alloy with low Fe content from sulfate system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1362541A CN1362541A (en) | 2002-08-07 |
| CN1162571C true CN1162571C (en) | 2004-08-18 |
Family
ID=4670744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011316284A Expired - Fee Related CN1162571C (en) | 2001-12-20 | 2001-12-20 | Electroplasting solution for electrodeposition of bright ZnFe alloy with low Fe content from sulfate system |
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|---|---|
| CN (1) | CN1162571C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063220B (en) * | 2007-05-22 | 2010-09-22 | 昆明理工大学 | Zinc and Zn-Fe alloy electroplating brightener |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063216B (en) * | 2007-05-22 | 2010-09-22 | 昆明理工大学 | Zinc and Zn-Fe alloy electroplating bright technique |
| CN101063219B (en) * | 2007-05-22 | 2010-08-25 | 昆明理工大学 | Technique for preparing zinc and Zn-Fe alloy electroplating brightener |
| CN104152954B (en) * | 2013-05-13 | 2017-11-24 | 鹤壁中德石化装备有限公司 | Zinc Brush Plating ferroalloy |
| CN109778263A (en) * | 2017-11-10 | 2019-05-21 | 丹阳市金地生态园林发展有限公司 | A kind of metal alloy bright plating liquid containing epoxychloropropane |
| CN112458506B (en) * | 2020-12-08 | 2023-10-31 | 佳盛电子科技(惠州)有限公司 | Electroplating solution for metal substrate |
-
2001
- 2001-12-20 CN CNB011316284A patent/CN1162571C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063220B (en) * | 2007-05-22 | 2010-09-22 | 昆明理工大学 | Zinc and Zn-Fe alloy electroplating brightener |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1362541A (en) | 2002-08-07 |
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