JPS54109035A - Directly plating method for chromium or chromium alloy surface with noble metal - Google Patents
Directly plating method for chromium or chromium alloy surface with noble metalInfo
- Publication number
- JPS54109035A JPS54109035A JP757278A JP757278A JPS54109035A JP S54109035 A JPS54109035 A JP S54109035A JP 757278 A JP757278 A JP 757278A JP 757278 A JP757278 A JP 757278A JP S54109035 A JPS54109035 A JP S54109035A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- noble metal
- gold
- chromium
- bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
PURPOSE: To directly plate the surface of Cr or its alloy with a noble metal with good adherence by removing a passivated film on the surface with electrolytic hydrogen and carrying out plating while holding surface potential so that no repassivation is induced.
CONSTITUTION: A product made of Cr or its alloy is activated as a cathode in an activating bath consisting of citric acid, KCN, etc. by electrolytic reduction at a current density f 1 A/dm2. The activated product is taken out from the bath and immediately dipped in a gold flash bath contg. citric acid, KCN, potassium cyanoaurate, etc. and having the same pH value as the activating bath while supplying a current to carry out flash plating. The plated product may further be shifted to a gold plating soln. for thick plating to carry out gold plating. By this method Al and Ti materials can be plated with a noble metal such as gold with good adherence besides Cr material.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53007572A JPS597360B2 (en) | 1978-01-26 | 1978-01-26 | Direct precious metal plating method on chromium or chromium alloy surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53007572A JPS597360B2 (en) | 1978-01-26 | 1978-01-26 | Direct precious metal plating method on chromium or chromium alloy surface |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54109035A true JPS54109035A (en) | 1979-08-27 |
JPS597360B2 JPS597360B2 (en) | 1984-02-17 |
Family
ID=11669516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53007572A Expired JPS597360B2 (en) | 1978-01-26 | 1978-01-26 | Direct precious metal plating method on chromium or chromium alloy surface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS597360B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5471049A (en) * | 1977-11-17 | 1979-06-07 | Hirotake Kimura | Precious metal plating method of nickellchromium alloy material |
-
1978
- 1978-01-26 JP JP53007572A patent/JPS597360B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5471049A (en) * | 1977-11-17 | 1979-06-07 | Hirotake Kimura | Precious metal plating method of nickellchromium alloy material |
Also Published As
Publication number | Publication date |
---|---|
JPS597360B2 (en) | 1984-02-17 |
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