| 摘要 |
PURPOSE:To maintain the ornamental effect of ornamental parts for a long period of time by forming a base layer codeposited with a fine hard dispersant on the surface of a base material then forming a surface layer on the base layer. CONSTITUTION:The base material 11 for the ornamental parts consisting of brass, german silver, etc., is subjected to an activation treatment with citric acid, etc., and thereafter the base layer 12 is formed thereon while the fine and hard dispersant 12a is codeposited. The base layer 12 is formed by uniformly codepositing the dispersant 12a into the electrodeposited Ni plating method in a plating bath essentially consisting of a nickel sulfonate bath contg. the above-mentioned dispersant 12a such as new ceramic SiC or alpha-BN and added with phosphorus. The surface layer 13 is then formed on the base layer 12 by an ordinary electrochemical plating method. The base material 11 is protected with the base layer 12 having the high film strength and wear resistance by such method, by which the ornamental effect is maintained for a long period of time. |
