FIELD: chemistry.
SUBSTANCE: invention relates to instrument-making and radio electronic industry and can be used in conditions where there is need for a top coat on a high-planarity printed-circuit board or longer period of preserving the capacity for soldering, or corrosion protection of articles made of copper and copper alloys using tin-containing coatings, or as a resistive coating in copper and copper alloy etching processes. The aqueous solution for chemical deposition of tin coatings on a copper or copper alloy surface has components in the following ratio, g/l: tin dichloride dihydrate - 2-20, thiourea - 5-85, sulphuric acid - 5-75, fluorides - 0.1-100. The solution may contain ammonium fluorides and alkali or alkali-earth metal fluorides.
EFFECT: invention enables to obtain coatings on a copper or copper alloy surface, having improved appearance, physical-chemical and functional properties.
4 cl
| Title | Year | Author | Number |
|---|---|---|---|
| SOLUTION FOR CHEMICAL APPLYING TIN COATING ON MEMBERS MADE OF COPPER AND ITS ALLOYS | 1997 |
|
RU2121013C1 |
| METHOD FOR CHEMICAL APPLICATION OF STANNIC COATING ONTO PARTS FROM COPPER OR ITS ALLOYS | 2012 |
|
RU2491369C1 |
| SOLUTION FOR CHEMICAL DEPOSITION OF TIN ONTO COPPER OR ITS ALLOYS | 0 |
|
SU1819911A1 |
| ANTICORROSIVE COATING APPLICATION METHOD | 2019 |
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RU2718794C1 |
| PROCESS OF DEPOSITION OF METAL COATS ON ARTICLES MADE OF MAGNESIUM AND ITS ALLOYS | 1999 |
|
RU2150534C1 |
| PROCEDURE FOR APPLICATION OF COMPLEX PROTECTIVE COATING ON STEEL PARTS | 2010 |
|
RU2427671C1 |
| SOLUTION FOR CHEMICAL PRECIPITATING OF TIN ALLOY-COATING | 0 |
|
SU779432A1 |
| METHOD OF PROTECTIVE COATING PRODUCING | 2015 |
|
RU2606364C1 |
| ELECTROLYTE FOR PROTECTIVE COATING WITH TIN-NICKEL ALLOY ON CARBON STEEL PRODUCT AND METHOD FOR PROTECTIVE COATING WITH TIN-NICKEL ALLOY ON CARBON STEEL PRODUCT | 2023 |
|
RU2804814C1 |
| ELECTROLYTE FOR PRECIPITATING TIN-LEAD ALLOY PLATINGS | 0 |
|
SU831874A1 |
