Electrodeposition of CuSn Alloy from Noncyanide Sulfosuccinate Bath

Abstract:

Recently the regulation of nickel usage because of allergy issues has been strengthened in Europe and other countries. The Cu-Sn alloy (40-55 mass%Sn) is called “speculum alloy” or “white bronze” and has a silvery-white appearance. We developed a noncyanide Cu-Sn alloy plating bath consisting of sulfosuccinic acid, L-methionine and polyoxyethylene-α-naphthol, from which silvery-white Cu-Sn alloy (40-55mass%Sn) were obtained. It is anticipated that the Cu-Sn alloy films will be used as an alternative to nickel undercoating for decorative gold or chromium electroplating.

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 1912-1915
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.1912
• Online since: June 2010
• Authors: Toshihiro Nakamura, Tomio Nagayama, Takayo Yamamoto, Yasushi Mizutani, Hidemi Nawafune
• Keywords: Crystal Structure, CuSn Alloy Electrodeposition, Ni-Free Decorative Plating, Sulfosuccinate Bath

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