JPS56142866A - Regeneration of nonelectrolytic plating liquid - Google Patents
Regeneration of nonelectrolytic plating liquidInfo
- Publication number
- JPS56142866A JPS56142866A JP4588780A JP4588780A JPS56142866A JP S56142866 A JPS56142866 A JP S56142866A JP 4588780 A JP4588780 A JP 4588780A JP 4588780 A JP4588780 A JP 4588780A JP S56142866 A JPS56142866 A JP S56142866A
- Authority
- JP
- Japan
- Prior art keywords
- plating liquid
- acid
- plating
- phosphorous acid
- treated
- 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
- Chemically Coating (AREA)
Abstract
PURPOSE: To permit the repeated use of nonelectrolytic plating liquid using hypophosphoric acid as a reducing agent by a method in which an aged plating liquid is treated with hydrogen peroxide to convert phosphorous acid present into phosphoric acid, and then the composition of the plating liquid so treated is again regulated to a desired composition.
CONSTITUTION: When nonelectrolytic plating is made using a plating liquid containing hypophosphorous acid, the hypophosphorous acid is changed into phosphorous acid and accumulated in the plating liquid. When the accumulated phosphorous acid reaches a concentration, the plating liquid undergoes self-decomposition and its color turns black to lose its plating efficiency. Thus, before reaching the limit concentration of phosphorous acid, or 0.2W0.25mol/l usually, the plating liquid is treated with hydrogen peroxide to convert the phosphorous acid into phosphoric acid and desired amounts of hypophosphorous acid and a metal ion are added to the plating liquid to regulate its composition in order to reuse it as the plating liquid. The plating liquid is not damaged by phosphoric acid, so that the plating liquid can be retreated for regeneration until the phosphoric acid becomes insoluble.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4588780A JPS589146B2 (en) | 1980-04-07 | 1980-04-07 | How to regenerate electroless plating solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4588780A JPS589146B2 (en) | 1980-04-07 | 1980-04-07 | How to regenerate electroless plating solution |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56142866A true JPS56142866A (en) | 1981-11-07 |
JPS589146B2 JPS589146B2 (en) | 1983-02-19 |
Family
ID=12731746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4588780A Expired JPS589146B2 (en) | 1980-04-07 | 1980-04-07 | How to regenerate electroless plating solution |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS589146B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6154819U (en) * | 1984-09-12 | 1986-04-12 | ||
JPS6228804U (en) * | 1985-08-07 | 1987-02-21 | ||
JPS62132102U (en) * | 1985-09-17 | 1987-08-20 |
-
1980
- 1980-04-07 JP JP4588780A patent/JPS589146B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS589146B2 (en) | 1983-02-19 |
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