CN104294332A - Preplating surface pretreatment solution for aluminum alloy - Google Patents
Preplating surface pretreatment solution for aluminum alloy Download PDFInfo
- Publication number
- CN104294332A CN104294332A CN201310305506.9A CN201310305506A CN104294332A CN 104294332 A CN104294332 A CN 104294332A CN 201310305506 A CN201310305506 A CN 201310305506A CN 104294332 A CN104294332 A CN 104294332A
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- CN
- China
- Prior art keywords
- sodium
- pretreatment fluid
- boric acid
- surface pretreatment
- ammonium citrate
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
Abstract
The invention discloses a preplating surface pretreatment solution for aluminum alloy. The pretreatment solution comprises: 120-130g/L zinc nitrate, 32-36g/L ammonium citrate, 8-12g/L sodium fluoride, 34-38g/L boric acid, 20-22g/L basic nickel carbonate, 1-2g/L thiourea, 9-11g/L sodium dodecyl benzene sulfonate, 1-3g/L sodium peroxide, and the balance water.
Description
Technical field
The present invention relates to technical field of surface, particularly relate to a kind of aluminium alloy plating front surface pretreatment fluid.
Background technology
Treatment before plating and plating posttreatment occupy extremely important status in metallic surface depositing process, there is defect often all by pre-treatment or aftertreatment is improper causes in the product of many employing plated surface technology manufacture, the object of surface coarsening process improves coat binding strength, available mechanical method or chemical method alligatoring.The reductive agent of catalytic metal ion when sensitized treatment makes Adsorption on Surface layer be easy to the material (catalytic film) of oxidation and activate as next step.In the activation solution that the surface of sensitized treatment is immersed containing catalytic metal ion after water rinses, then catalytic metal ion just with after sensitization is adsorbed on the material being easy on the surface be oxidized and produces and react and form metal particles deposition from the teeth outwards.Reductive agent is put in surface after activated after water rinses, and makes the reducing metal ions in solution become metal and is deposited on the surface thus form a kind of metal conductive film, making it to become electrical conductor, to carry out brush plating.Aluminium sheet easily forms Natural Oxide Film and is often subject to etch in the plating solution and displaces plated metal, thus affects the sticking power of coating.
Report in prior art adopt activation solution before plating anodizing is carried out to Al and Alalloy, as Japanese Patent 80-012193 acidic fluoride solutions Al and Alalloy is electroplated before anodizing; The U.S.'s No. 4100038 patents then adopt the activation solution of stannate and the preparation such as polyvinyl alcohol, polyethylene oxide to carry out the process of plating front activating to Al and Alalloy.But the employing fluorochemical that these treatment processs have preparation activation solution, thus cost is high, toxicity large, and some operational conditions require harsh, and soak time is long, and wants copper facing to make bottom.
Summary of the invention
The object of the invention is to propose a kind of aluminium alloy plating front surface pretreatment fluid, the adjustment of the component of this pretreatment fluid, overcomes the defect of prior art, makes aluminum alloy surface obtain excellent pre-treatment rete, for follow-up plating provides good basis.
For reaching this object, the present invention by the following technical solutions:
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 120-130g/L, ammonium citrate 32-36g/L, Sodium Fluoride 8-12g/L, boric acid 34-38g/L, basic nickel carbonate 20-22g/L, thiocarbamide 1-2g/L, Sodium dodecylbenzene sulfonate 9-11g/L, sodium peroxide 1-3g/L, surplus is water.
Preferably, consisting of of this pretreatment fluid: zinc nitrate 123-127g/L, ammonium citrate 33-35g/L, Sodium Fluoride 9-11g/L, boric acid 35-37g/L, basic nickel carbonate 20.5-21.5g/L, thiocarbamide 1.3-1.7g/L, Sodium dodecylbenzene sulfonate 9.5-10.5g/L, sodium peroxide 1.5-2.5g/L, surplus is water.
Most preferably, consisting of of this pretreatment fluid: zinc nitrate 125g/L, ammonium citrate 34g/L, Sodium Fluoride 10g/L, boric acid 36g/L, basic nickel carbonate 21.0g/L, thiocarbamide 1.5g/L, Sodium dodecylbenzene sulfonate 10.0g/L, sodium peroxide 2.0g/L, surplus is water.
Beneficial effect of the present invention is:
The present invention adopts zinc nitrate and a small amount of basic nickel carbonate to decide salt, and ammonium citrate, Sodium Fluoride make double complexing agents, and boric acid makes buffer reagent and pH adjusting agent, and thiocarbamide makes hydrogen inhibitor, and Sodium dodecylbenzene sulfonate is configured to acidic zinc dipping solution as wetting agent.The present invention is simpler than other method technique, is easy to control, and with low cost, little to the degree of aluminum silicon alloy matrix corrosion, the form of zinc crystal grain, uniformity coefficient, density, coverage are all relatively good.Compared with traditional strong basicity zinc dipping solution, meet the requirement to accessory size measure of precision, coordination agent containing prussiate, is not conducive to environment protection, is conducive to the healthy of operator, can realize green production.
Embodiment
Embodiment one
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 120g/L, ammonium citrate 36g/L, Sodium Fluoride 8g/L, boric acid 38g/L, basic nickel carbonate 20g/L, thiocarbamide 2g/L, Sodium dodecylbenzene sulfonate 9g/L, sodium peroxide 3g/L, surplus is water.
Embodiment two
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 130g/L, ammonium citrate 32g/L, Sodium Fluoride 12g/L, boric acid 34g/L, basic nickel carbonate 22g/L, thiocarbamide 1g/L, Sodium dodecylbenzene sulfonate 11g/L, sodium peroxide 1g/L, surplus is water.
Embodiment three
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 123g/L, ammonium citrate 35g/L, Sodium Fluoride 9g/L, boric acid 37g/L, basic nickel carbonate 20.5g/L, thiocarbamide 1.7g/L, Sodium dodecylbenzene sulfonate 9.5g/L, sodium peroxide 2.5g/L, surplus is water.
Embodiment four
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 127g/L, ammonium citrate 33g/L, Sodium Fluoride 11g/L, boric acid 35g/L, basic nickel carbonate 21.5g/L, thiocarbamide 1.3g/L, Sodium dodecylbenzene sulfonate 10.5g/L, sodium peroxide 1.5g/L, surplus is water.
Embodiment five
A kind of aluminium alloy plating front surface pretreatment fluid, consisting of of this pretreatment fluid: zinc nitrate 125g/L, ammonium citrate 34g/L, Sodium Fluoride 10g/L, boric acid 36g/L, basic nickel carbonate 21g/L, thiocarbamide 1.5g/L, Sodium dodecylbenzene sulfonate 10g/L, sodium peroxide 2g/L, surplus is water.
Claims (3)
1. an aluminium alloy plating front surface pretreatment fluid, it is characterized in that, consisting of of this pretreatment fluid: zinc nitrate 120-130g/L, ammonium citrate 32-36g/L, Sodium Fluoride 8-12g/L, boric acid 34-38g/L, basic nickel carbonate 20-22g/L, thiocarbamide 1-2g/L, Sodium dodecylbenzene sulfonate 9-11g/L, sodium peroxide 1-3g/L, surplus is water.
2. a kind of aluminium alloy plating front surface pretreatment fluid as claimed in claim 1, it is characterized in that, consisting of of this pretreatment fluid: zinc nitrate 123-127g/L, ammonium citrate 33-35g/L, Sodium Fluoride 9-11g/L, boric acid 35-37g/L, basic nickel carbonate 20.5-21.5g/L, thiocarbamide 1.3-1.7g/L, Sodium dodecylbenzene sulfonate 9.5-10.5g/L, sodium peroxide 1.5-2.5g/L, surplus is water.
3. a kind of aluminium alloy plating front surface pretreatment fluid as claimed in claim 2, it is characterized in that, consisting of of this pretreatment fluid: zinc nitrate 125g/L, ammonium citrate 34g/L, Sodium Fluoride 10g/L, boric acid 36g/L, basic nickel carbonate 21.0g/L, thiocarbamide 1.5g/L, Sodium dodecylbenzene sulfonate 10.0g/L, sodium peroxide 2.0g/L, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310305506.9A CN104294332A (en) | 2013-07-19 | 2013-07-19 | Preplating surface pretreatment solution for aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310305506.9A CN104294332A (en) | 2013-07-19 | 2013-07-19 | Preplating surface pretreatment solution for aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104294332A true CN104294332A (en) | 2015-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310305506.9A Pending CN104294332A (en) | 2013-07-19 | 2013-07-19 | Preplating surface pretreatment solution for aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104294332A (en) |
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2013
- 2013-07-19 CN CN201310305506.9A patent/CN104294332A/en active Pending
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |