| 摘要 |
The present invention describes a method of producing gold coating on a workpiece having a palladium surface, having the steps of:a) making an aqueous solution containing at least one compound selected from the group of compounds containing gold(I) and gold(III) ions and additionally at least one organic compound selected from the group consisting of formic acid, aromatic carboxylic acids having the chemical formula:where R1, . . . , R4=H, alkyl, alkenyl, alkynyl, OH, and the salts, esters or amides of these compounds;b) adjusting the pH of the solution to 1 to 6 using pH adjusting agents; andc) bringing the workpiece into contact with the solution such that gold coating is plated onto the palladium surface.
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