表面技術
Online ISSN : 1884-3409
Print ISSN : 0915-1869
ISSN-L : 0915-1869
研究論文
低品位金合金用非シアン系電解研磨液の開発と研磨挙動の解明
望月 陽介有泉 直子宮川 和博柴田 正実
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2012 年 63 巻 8 号 p. 526-

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In this study, a non-cyanide electropolishing solution was prepared for low-grade gold alloy containing palladium (Pd). Electropolishing conducted with an existing non-cyanide electropolishing solution prepared for 18-karat gold produced a rough and not mirror-finished 10-karat white gold (K10WG) surface. However, an electropolishing solution containing sodium sulfate and thiourea produced a smooth polished surface that exhibited some protrusions with a high Pd concentration. These protrusions decreased numerically when ethylene diamine tetraacetic acid tetrasodium (EDTA-4Na) was introduced into the sodium sulfate and thiourea solution to chelate noble metal such as Au and Pd. Electropolishing of K10WG using the solution containing thiourea, sodium sulfate, and EDTA-4Na produce a well-polished surface exhibiting high specular gloss.

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© 2012 一般社団法人 表面技術協会
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