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1.发明申请公开(公告)号：US20170342582A1
公开(公告)日：2017-11-30
申请号：US15678771
申请日：2017-08-16
发明人： Roderick D. Herdman , Stacey Handy , Trevor Pearson , Toshiyuki Yamamoto , Kotaro Ishiwata , Masahiro Hara , Tatsuya Nishiyama
摘要： The invention consists of a chromium electroplating solution comprising a chromium electroplating solution comprising: (1) a water soluble trivalent chromium salt; (2) at least one complexant for trivalent chromium ions; (3) a source of hydrogen ions sufficient to create a pH of from 2.8-4.2; (4) a pH buffering compound; and (5) a sulfur-containing organic compound. The chromium electroplating solution is usable in a method for producing an adherent metallic coating on a decorative article, such coating having enhanced resistance to corrosion in environments containing calcium chloride.
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公开(公告)号：US20170306515A1
公开(公告)日：2017-10-26
申请号：US15134469
申请日：2016-04-21
发明人： Masahiro Hara , Tatsuya Nishiyama
摘要： An aqueous trivalent chromium electrolyte comprising trivalent chromium ions and amino acids that allow for producing a dark colored hue in the trivalent chromium coating which is plated on a substrate. The amino acids described herein comprise a cationic side chain and are at least essentially free of sulfur. The cationic side chain of the amino acid further comprises nitrogen. When used in the trivalent chromium electrolyte, these amino acids allow for producing significantly darker trivalent chromium deposits. The trivalent chromium electrolyte is used in a method for producing the desired dark colored hue in the trivalent chromium coating that is produced on a substrate using electrodeposition.
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