| 摘要 |
PROBLEM TO BE SOLVED: To suppress the chain-like progression of the corrosion of a main body of parts for outdoor use. SOLUTION: An etching layer 11 formed by acid electrolytic treatment, an electrolytic Ni plating layer 12, a first semi-bright plating layer 13 formed by first semi-bright plating treatment, a Cu plating layer 14 formed by Cu plating treatment, a second semi-bright plating layer 15 formed by second semi-bright plating treatment, an Ni plating layer 16 formed by tri-Ni plating treatment, a gloss Ni plating layer 17 formed by gloss Ni plating treatment, an Sn-Ni alloy plating layer 18 formed by Sn-Ni alloy plating treatment, and an IP layer 19 formed by ion plating deposition treatment, are formed on the surface of the main body 10 of the parts. COPYRIGHT: (C)2008,JPO&INPIT
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