| 摘要 |
PURPOSE:To form easily and inexpensively a silver coating having high electrical conductivity on the surface of a metallic material with high safety and ease of handling by treating the metallic material with a chemical plating liquid which contains silver sulfate and aminocarboxylic acid and is adjusted to adequate pH. CONSTITUTION:A metallic material consisting of copper, iron, nickel, stainless steel or the like in a powder, fiber or plate form is treated by a dipping method, spraying method, etc. using a chemical plating liquid which contains silver sulfate and aminocarboxylic acids such as aminocarboxylic acid or the like and is adjusted to >=6, more preferably 6-11pH by an alkali metal carbonate such as sodium carbonate or the like, by which a metallic silver coating is formed on the surface of said metallic material. Ethylenediaminetetraacetic acid, nitrilotriacetate, hydroxyethylethylenediaminetriacetic acid, ethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, hydroxyethyliminediacetic acid, dihydroxyethyl glycine, etc. are adequately used for the above-mentioned aminocarboxylic acid.
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