CN104213167A - Magnesium alloy surface chromium electroplating combination solution - Google Patents
Magnesium alloy surface chromium electroplating combination solution Download PDFInfo
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- CN104213167A CN104213167A CN201310222486.9A CN201310222486A CN104213167A CN 104213167 A CN104213167 A CN 104213167A CN 201310222486 A CN201310222486 A CN 201310222486A CN 104213167 A CN104213167 A CN 104213167A
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Abstract
The invention discloses a magnesium alloy surface chromium electroplating combination solution, which is characterized by including an electrogalvanizing plating solution, an electronickelling plating solution and a chromium electroplating solution. By adjusting the electrogalvanizing plating solution, the electronickelling plating solution components and the chromium electroplating solution components, and without adopting toxic and high pollution components, the plating process is environment friendly and safe, and the prepared plated layer has high corrosion resistance, beautiful appearance, and high binding force between the substrate and the plated layer. The plated layer has performance equal to and even better than that of plated layers prepared by traditional processes.
Description
Technical field
The present invention relates to electroplating technology field, particularly relate to a kind of Mg alloy surface electrodeposited chromium combination solution.
Background technology
Magnesium alloy, as a kind of lightweight engineered structured material, has high specific strength, high specific stiffness and superior damping performance, and have a wide range of applications in fields such as traffic, communication, Aeronautics and Astronautics field.But magnesium alloy chemical activity is high, and electropotential is low, surface film oxide loosens, and causes barrier propterty low, constrains the application and development of magnesium alloy.Cause the concern of people to magnesium alloy part surface corrosion and protection thus, large quantifier elimination has been carried out in Mg alloy surface anodic oxidation, chemical conversion film, organic coating, coating surface etc., particularly employing method for electroplating nickel is low as a kind of cost, technique simple, the surface coating technique of easy handling, has become the important research direction of people to magnesium alloy surface protective.
At present, the electro-plating method of magnesium alloy is mainly and could starts to electroplate other metal after zinc-plated, copper pre-plating in advance, and major part is for containing cyanogen plating.Such as, what both at home and abroad generally adopt now is the standard method of the plated metal Ni that U.S. ASTM recommends, and be the leaching zinc plating method of Dow company exploitation, its pre-treatment have employed leaching zinc and cyanide copper plating technique.But this complex technical process, repeatability is poor, and use prussiate, plating solution is poisonous, contaminate environment, and the bright property of coating and the stability of plating solution also need further improvement.
In order to overcome the shortcoming of complex process, software engineering researchers invent has gone out direct electroless nickel method, as adopted chromic anhydride in JP2003073843, etch is carried out to magnesium alloy, chemical nickel plating is carried out after fluorochemical activation, chemical nickel-plating liquid is regulated to make it be weakly alkaline with ammoniacal liquor, once bonding force was obtained good, the chemical Ni-plating layer that solidity to corrosion is high, Li De is high adopt in patent CN1699634A magnesium alloy plating method go wadding → electrochemical deoiling → bright dipping → in and the zincincation of → activation → in advance obtain reasonable pre-zinc coating, and pre-galvanizing flux is without cyanogen, nontoxic, harmless, the people such as Yang Noboru are in patent CN1737205A, by Direct Electroplating aluminium after dense hydrofluoric acid (11%) used for magnesium alloy pickling, obtain reasonable aluminium coat, Chinese patent CN1641075A is to magnesium, the surface of magnesium alloy or activating treatment process and plated surface method did detailed description, although these techniques have all departed from prussiate plating, but the treatment process before plating is mostly based on the improvement of the technique to DOW.
Summary of the invention
The object of the invention is to propose a kind of Mg alloy surface electrodeposited chromium combination solution, by the adjustment to electro-galvanizing plating solution, electronickelling bath composition and electrodeposited chromium component, do not adopt poisonous, pollute high component, make plating technic Environmental Safety, and the corrosion-resistant height of coating of preparation, appearance looks elegant, matrix and binding force of cladding material high.
For reaching this object, the present invention by the following technical solutions:
A kind of Mg alloy surface electrodeposited chromium combination solution, described combination solution comprises electro-galvanizing plating solution, electronickelling plating solution and electrodeposited chromium plating solution, and wherein electro-galvanizing plating solution consists of: ZnSO
47H
2o32-36g/L, K
4p
2o
73H
2o164-168g/L, KF18-20g/L, C
6h
17o
7n
332-36g/L, phytic acid 0.4-0.6g/L, H
2cSNH
2: 4-6g/L, surplus is water; Electronickelling plating solution consists of: single nickel salt 210-220g/L, nickelous chloride 15-17g/L, boric acid 52-56g/L, potassium sulfate 20-26g/L, sodium laurylsulfonate 0.5-1.5g/L, anhydrous sodium acetate 36-40g/L, ethoxyquin butynediol 30-40mg/L, propionic acid 3-4g/L, surplus is water; Electrodeposited chromium plating solution consists of: chromium sulphate 160-170g/L, sodium sulfate 270-280g/L; Brometo de amonio 0.6-0.8mol/L; Boric acid 1.5-1.7mol/L; Inferior sodium phosphate 0.6-0.8mol/L; Oxalic acid 1.2-1.4mol/L; Sodium lauryl sulphate 0.03-0.05mol/L, ferrous sulfate 0.05-0.07mol/L, surplus is water.
The applicable electroplating technology of aforesaid combination solution is: alkali cleaning → pickling → activation → leaching zinc → electro-galvanizing → electronickelling → electrodeposited chromium.
Wherein, the technique of electro-galvanizing can be: in above-mentioned electro-galvanizing plating solution, with stainless steel or graphite for anode, and electroplating temperature: 30-50 DEG C, electroplating time 30-50min, current density: 1.0-3.0A/dm
2.Electro-nickel process condition can be: in above-mentioned electronickelling plating solution, pH value 3.5-4.5; Current density 2.5-3.5A/dm
2, temperature 65-75 DEG C, time 20-30min.Electrodeposited chromium technique can be: electroplate in above-mentioned electric chrome solution, and processing parameter is: pH value 2.0-3.5; Technological temperature 40-60 DEG C, cathode current density 20-24A/dm
2, electroplating time 20-30 minute.
The advantage that the present invention has:
By the adjustment to electro-galvanizing plating solution, electronickelling bath composition and electrodeposited chromium component, do not adopt poisonous, pollute high component, make plating technic Environmental Safety, and the corrosion-resistant height of coating of preparation, appearance looks elegant, matrix and binding force of cladding material high, the coating performance prepared with traditional technology is suitable, is even better than traditional technology.
Embodiment
Embodiment one
A kind of Mg alloy surface electrodeposited chromium combination solution, described combination solution comprises electro-galvanizing plating solution, electronickelling plating solution and electrodeposited chromium plating solution, and wherein electro-galvanizing plating solution consists of: ZnSO
47H
2o32g/L, K
4p
2o
73H
2o168g/L, KF18g/L, C
6h
17o
7n
336g/L, phytic acid 0.4g/L, H
2cSNH
2: 6g/L, surplus is water; Electronickelling plating solution consists of: single nickel salt 210g/L, nickelous chloride 17g/L, boric acid 52g/L, potassium sulfate 26g/L, sodium laurylsulfonate 0.5g/L, anhydrous sodium acetate 40g/L, ethoxyquin butynediol 30mg/L, propionic acid 4g/L, and surplus is water; Electrodeposited chromium plating solution consists of: chromium sulphate 160g/L, sodium sulfate 280g/L; Brometo de amonio 0.6mol/L; Boric acid 1.7mol/L; Inferior sodium phosphate 0.6mol/L; Oxalic acid 1.4mol/L; Sodium lauryl sulphate 0.03mol/L, ferrous sulfate 0.07mol/L, surplus is water.
Embodiment two
A kind of Mg alloy surface electrodeposited chromium combination solution, described combination solution comprises electro-galvanizing plating solution, electronickelling plating solution and electrodeposited chromium plating solution, and wherein electro-galvanizing plating solution consists of: ZnSO
47H
2o36g/L, K
4p
2o
73H
2o164g/L, KF20g/L, C
6h
17o
7n
332g/L, phytic acid 0.6g/L, H
2cSNH
2: 4g/L, surplus is water; Electronickelling plating solution consists of: single nickel salt 220g/L, nickelous chloride 15g/L, boric acid 56g/L, potassium sulfate 20g/L, sodium laurylsulfonate 1.5g/L, anhydrous sodium acetate 36g/L, ethoxyquin butynediol 40mg/L, propionic acid 3g/L, and surplus is water; Electrodeposited chromium plating solution consists of: chromium sulphate 170g/L, sodium sulfate 270g/L; Brometo de amonio 0.8mol/L; Boric acid 1.5mol/L; Inferior sodium phosphate 0.8mol/L; Oxalic acid 1.2mol/L; Sodium lauryl sulphate 0.05mol/L, ferrous sulfate 0.05mol/L, surplus is water.
Embodiment three
A kind of Mg alloy surface electrodeposited chromium combination solution, described combination solution comprises electro-galvanizing plating solution, electronickelling plating solution and electrodeposited chromium plating solution, and wherein electro-galvanizing plating solution consists of: ZnSO
47H
2o34g/L, K
4p
2o
73H
2o166g/L, KF19g/L, C
6h
17o
7n
334g/L, phytic acid 0.5g/L, H
2cSNH
2: 5g/L, surplus is water; Electronickelling plating solution consists of: single nickel salt 215g/L, nickelous chloride 16g/L, boric acid 54g/L, potassium sulfate 23g/L, sodium laurylsulfonate 1.0g/L, anhydrous sodium acetate 38g/L, ethoxyquin butynediol 35mg/L, propionic acid 3.5g/L, and surplus is water; Electrodeposited chromium plating solution consists of: chromium sulphate 165g/L, sodium sulfate 275g/L; Brometo de amonio 0.7mol/L; Boric acid 1.6mol/L; Inferior sodium phosphate 0.7mol/L; Oxalic acid 1.3mol/L; Sodium lauryl sulphate 0.04mol/L, ferrous sulfate 0.06mol/L, surplus is water.
Claims (1)
1. a Mg alloy surface electrodeposited chromium combination solution, is characterized in that, described combination solution comprises electro-galvanizing plating solution, electronickelling plating solution and electrodeposited chromium plating solution, and wherein electro-galvanizing plating solution consists of: ZnSO
47H
2o32-36g/L, K
4p
2o
73H
2o164-168g/L, KF18-20g/L, C
6h
17o
7n
332-36g/L, phytic acid 0.4-0.6g/L, H
2cSNH
2: 4-6g/L, surplus is water; Electronickelling plating solution consists of: single nickel salt 210-220g/L, nickelous chloride 15-17g/L, boric acid 52-56g/L, potassium sulfate 20-26g/L, sodium laurylsulfonate 0.5-1.5g/L, anhydrous sodium acetate 36-40g/L, ethoxyquin butynediol 30-40mg/L, propionic acid 3-4g/L, surplus is water; Electrodeposited chromium plating solution consists of: chromium sulphate 160-170g/L, sodium sulfate 270-280g/L; Brometo de amonio 0.6-0.8mol/L; Boric acid 1.5-1.7mol/L; Inferior sodium phosphate 0.6-0.8mol/L; Oxalic acid 1.2-1.4mol/L; Sodium lauryl sulphate 0.03-0.05mol/L, ferrous sulfate 0.05-0.07mol/L, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222486.9A CN104213167A (en) | 2013-06-04 | 2013-06-04 | Magnesium alloy surface chromium electroplating combination solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222486.9A CN104213167A (en) | 2013-06-04 | 2013-06-04 | Magnesium alloy surface chromium electroplating combination solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104213167A true CN104213167A (en) | 2014-12-17 |
Family
ID=52095060
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|---|---|---|---|
| CN201310222486.9A Pending CN104213167A (en) | 2013-06-04 | 2013-06-04 | Magnesium alloy surface chromium electroplating combination solution |
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2013
- 2013-06-04 CN CN201310222486.9A patent/CN104213167A/en active Pending
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Application publication date: 20141217 |