CN104233240A - Method for plating silver on aluminum alloy part - Google Patents
Method for plating silver on aluminum alloy part Download PDFInfo
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- CN104233240A CN104233240A CN201410408297.5A CN201410408297A CN104233240A CN 104233240 A CN104233240 A CN 104233240A CN 201410408297 A CN201410408297 A CN 201410408297A CN 104233240 A CN104233240 A CN 104233240A
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- aluminum alloy
- plating
- alloy part
- zinc
- silver
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Abstract
The invention relates to a method for plating silver on an aluminum alloy part, and belongs to the field of chemical silver plating processes. The method is characterized by comprising the following steps of: (1) chemically deoiling and washing the aluminum alloy part by using an oil removal agent, and then carrying out alkali corrosion treatment at the temperature of 60-70 DEG C for the time of 0.5-1.0 minute by using 80-1000 g/L of NaOH to remove dirt on an aluminum alloy surface and activate a substrate; (2) carrying out polishing treatment at room temperature for 5-10 seconds by using 500 ml/L of HNO3 and 60 ml/L of HF with the mass fraction of 40%; (3) carrying out zinc plating treatment on the aluminum alloy part by using a zinc immersion solution and adopting a chemical zinc plating method. According to the method, the treatment is carried out by adopting a zinc immersion and plating combination method through the improvement on an original process, cyaniding zinc plating is added after zinc immersion, and then copper cyanide plating and bright silver plating are carried out, so that the qualification rate of primary silver plating is enhanced, the problem that the bottom of a complex part is blistered is thoroughly solved, the process requirement is met, and the quality of a filter is ensured. The method disclosed by the invention is simple to operate and easy to popularize.
Description
Technical field
The invention belongs to Electroless Silver Plating field, particularly relate to a kind of silver-coating method of aluminum alloy part.
Background technology
Many parts of electronic product wave filter are aluminum alloy junction component, for improving the surface conductivity of aluminium alloy further, need to carry out silver-plated process.This volume of part is comparatively large, and inner chamber is comparatively dark, and complex structure, normally electroplates by typical process, and inside workpiece, a lot of bubble can be played in bottom, causes and does over again in a large number and the waste of noble silver, produce and be difficult to normally carry out.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of silver-coating method of aluminum alloy part.
A silver-coating method for aluminum alloy part, is characterized in that comprising the steps:
(1) electrochemical deoiling washing is carried out in aluminum alloy part oil removing spirit, then use the NaOH of 80g/L ~ 1000g/L to carry out alkaline etching process at the temperature of 60 DEG C ~ 70 DEG C, the time is 0.5min ~ 1.0min, to remove the dirt of aluminum alloy surface, and matrix is activated;
(2) HNO is used after
3500ml/L, massfraction is the HF60ml/L of 40%, and at room temperature, the used time, 5s ~ 10s went out optical processing;
(3) electroless zinc plating method is adopted to carry out zinc-plated process to aluminum alloy part with zincate solution;
(4) secondary galvanization is carried out to aluminum alloy part, use ZnO 35g/L ~ 45g/L, NaCN 70g/L ~ 90g/L, NaOH 60g/L ~ 70g/L, 95 zinc-plated open cylinder agent 5ml/L, 95 zinc-plating brightener 3ml/L ~ 5ml/L, temperature 5 DEG C ~ 45 DEG C, current density 0.5A/dm
2~ 3.0A/dm
2, time 2min ~ 5min;
(5) to above-mentioned part at CuCN 55g/L ~ 85g/L, NaCN 10g/L ~ 15g/L, 991 brightening agent 1.0ml/L ~ 1.2ml/L, under the environment that temperature is 55 DEG C ~ 65 DEG C, carry out the copper plating treatment of duration 10min ~ 15min;
(6) to step (5) described aluminum alloy part at KAg (CN)
220g/L ~ 40g/L, KCN 90g/L ~ 150g/L, KOH 5g/L ~ 10g/L, temperature is carry out silver-plated process under the environment of 10 DEG C ~ 30 DEG C.
The silver-coating method of a kind of aluminum alloy part of the present invention, is characterized in that 898 oil removing spirit Type Bs are selected in the oil removing in described step (1).
The silver-coating method of a kind of aluminum alloy part of the present invention, it is characterized in that the fuel-displaced washing temperature in described step (1) is less than 50 DEG C, the time is 2min ~ 10min.
The silver-coating method of a kind of aluminum alloy part of the present invention, by the improvement to original technique, adopt the process of leaching zinc plating integrated process, after leaching zinc, increase cyanide zinc plating wastewater, then plate cyanogen copper and bright silver, make once silver-plated qualification rate be improved, thoroughly solve a difficult problem of bubbling bottom complicated shape, meet process requirements, ensure that the quality of this wave filter, present method simple to operate and be easy to promote.
Embodiment
The silver-coating method of a kind of aluminum alloy part of the present invention, is characterized in that comprising the steps:
(1) electrochemical deoiling washing is carried out in aluminum alloy part oil removing spirit, then use the NaOH of 80g/L ~ 1000g/L to carry out alkaline etching process at the temperature of 60 DEG C ~ 70 DEG C, the time is 0.5min ~ 1.0min, to remove the dirt of aluminum alloy surface, and matrix is activated;
(2) HNO is used after
3500ml/L, massfraction is the HF60ml/L of 40%, and at room temperature, the used time, 5s ~ 10s went out optical processing;
(3) electroless zinc plating method is adopted to carry out zinc-plated process to aluminum alloy part with zincate solution;
(4) secondary galvanization is carried out to aluminum alloy part, use ZnO 35g/L ~ 45g/L, NaCN 70g/L ~ 90g/L, NaOH 60g/L ~ 70g/L, 95 zinc-plated open cylinder agent 5ml/L, 95 zinc-plating brightener 3ml/L ~ 5ml/L, temperature 5 DEG C ~ 45 DEG C, current density 0.5A/dm
2~ 3.0A/dm
2, time 2min ~ 5min;
(5) to above-mentioned part at CuCN 55g/L ~ 85g/L, NaCN 10g/L ~ 15g/L, 991 brightening agent 1.0ml/L ~ 1.2ml/L, under the environment that temperature is 55 DEG C ~ 65 DEG C, carry out the copper plating treatment of duration 10min ~ 15min;
(6) to step (5) described aluminum alloy part at KAg (CN)
220g/L ~ 40g/L, KCN 90g/L ~ 150g/L, KOH 5g/L ~ 10g/L, temperature is carry out silver-plated process under the environment of 10 DEG C ~ 30 DEG C.
The silver-coating method of a kind of aluminum alloy part of the present invention, is characterized in that 898 oil removing spirit Type Bs are selected in the oil removing in described step (1).The silver-coating method of described a kind of aluminum alloy part, it is characterized in that the fuel-displaced washing temperature in described step (1) is less than 50 DEG C, the time is 2min ~ 10min.
Claims (3)
1. a silver-coating method for aluminum alloy part, is characterized in that comprising the steps:
(1) electrochemical deoiling washing is carried out in aluminum alloy part oil removing spirit, then use the NaOH of 80g/L ~ 1000g/L to carry out alkaline etching process at the temperature of 60 DEG C ~ 70 DEG C, the time is 0.5min ~ 1.0min, to remove the dirt of aluminum alloy surface, and matrix is activated;
(2) HNO is used after
3500ml/L, massfraction is the HF60ml/L of 40%, and at room temperature, the used time, 5s ~ 10s went out optical processing;
(3) electroless zinc plating method is adopted to carry out zinc-plated process to aluminum alloy part with zincate solution;
(4) secondary galvanization is carried out to aluminum alloy part, use ZnO 35g/L ~ 45g/L, NaCN 70g/L ~ 90g/L, NaOH 60g/L ~ 70g/L, 95 zinc-plated open cylinder agent 5ml/L, 95 zinc-plating brightener 3ml/L ~ 5ml/L, temperature 5 DEG C ~ 45 DEG C, current density 0.5A/dm
2~ 3.0A/dm
2, time 2min ~ 5min;
(5) to above-mentioned part at CuCN 55g/L ~ 85g/L, NaCN 10g/L ~ 15g/L, 991 brightening agent 1.0ml/L ~ 1.2ml/L, under the environment that temperature is 55 DEG C ~ 65 DEG C, carry out the copper plating treatment of duration 10min ~ 15min;
(6) to step (5) described aluminum alloy part at KAg (CN)
220g/L ~ 40g/L, KCN 90g/L ~ 150g/L, KOH 5g/L ~ 10g/L, temperature is carry out silver-plated process under the environment of 10 DEG C ~ 30 DEG C.
2. the silver-coating method of a kind of aluminum alloy part as claimed in claim 1, is characterized in that 898 oil removing spirit Type Bs are selected in the oil removing in described step (1).
3. the silver-coating method of a kind of aluminum alloy part as claimed in claim 1, it is characterized in that the fuel-displaced washing temperature in described step (1) is less than 50 DEG C, the time is 2min ~ 10min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408297.5A CN104233240A (en) | 2014-08-19 | 2014-08-19 | Method for plating silver on aluminum alloy part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408297.5A CN104233240A (en) | 2014-08-19 | 2014-08-19 | Method for plating silver on aluminum alloy part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104233240A true CN104233240A (en) | 2014-12-24 |
Family
ID=52222116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410408297.5A Pending CN104233240A (en) | 2014-08-19 | 2014-08-19 | Method for plating silver on aluminum alloy part |
Country Status (1)
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| CN (1) | CN104233240A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463525A (en) * | 2016-01-14 | 2016-04-06 | 深圳市瑞世兴科技有限公司 | Aluminum-alloy silver plating method |
| CN110257869A (en) * | 2019-07-09 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of aluminium alloy silver-coating method |
| CN110527993A (en) * | 2019-09-03 | 2019-12-03 | 国网福建省电力有限公司 | The environmentally friendly silver plating process of aluminum alloy surface plating silver |
-
2014
- 2014-08-19 CN CN201410408297.5A patent/CN104233240A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463525A (en) * | 2016-01-14 | 2016-04-06 | 深圳市瑞世兴科技有限公司 | Aluminum-alloy silver plating method |
| CN110257869A (en) * | 2019-07-09 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of aluminium alloy silver-coating method |
| CN110527993A (en) * | 2019-09-03 | 2019-12-03 | 国网福建省电力有限公司 | The environmentally friendly silver plating process of aluminum alloy surface plating silver |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |
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| WD01 | Invention patent application deemed withdrawn after publication |