专利检索 ap:("Atotech Deutschland GmbH & Co. KG") AND inv:"Olaf KURTZ" 第 1 页

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发明申请
METHOD FOR ELECTROLYTICALLY PASSIVATING A SURFACE OF SILVER, SILVER ALLOY, GOLD, OR GOLD ALLOY 有权

公开(公告)号：US20220389603A1

公开(公告)日：2022-12-08

申请号：US17888160

申请日：2022-08-15

申请人： Atotech Deutschland GmbH & Co. KG

发明人： Robert RÜTHER , Olaf KURTZ , Joko SETYADI-LIE , Tse-Cheen FOONG

IPC分类号： C25D3/06

摘要： The present invention relates to an aqueous passivation solution having a pH in the range from 5.4 to 7.2, the solution including trivalent chromium ions, and formate anions and/or oxalate anions as complexing agents for said trivalent chromium ions, in which the trivalent chromium ions with respect to all formate anions together with all oxalate anions form a molar ratio in the range from 1:15 to 1:400.