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

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タイトル別名
  • Development of Non-cyanide Electropolishing Solution for Low-Grade Gold Alloy and Elucidation of Polish Behavior
  • テイヒンイ キンゴウキンヨウ ヒシアンケイ デンカイ ケンマエキ ノ カイハツ ト ケンマ キョドウ ノ カイメイ

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抄録

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.

収録刊行物

  • 表面技術

    表面技術 63 (8), 526-, 2012

    一般社団法人 表面技術協会

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