Corrosion of Nickel-Plated Brass in Wooden Boxes

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  • 木箱内におけるニッケルメッキ黄銅の腐食
  • キバコ ナイ ニ オケル ニッケルメッキ オウドウ ノ フショク

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Some truck relay parts mounted in wooden boxes corroded unusually before use. They were made of nickel-plated brass and corroded in a month of winter. Results of corrosion products analysis showed that these were mainly nickel acetate and a kind of acetate of copper (probably one of basic salts). For the purpose of finding out the source of acetic compounds, several corrosion tests were performed in three kinds of corrosive atmospheres (above vinyl acetate emulsion adhesive, 0.1N acetic acid solution and vinyl acetate monomer). It was suggested, though with many obscurity, that the corrosion was caused by acetic acid from wood and vinyl acetate from adhesive.

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