A METHOD FOR ELECTROLYTICALLY PASSIVATING A SURFACE OF SILVER, SILVER ALLOY, GOLD, OR GOLD ALLOY

The present invention relates to an aqueous passivation solution having a pH in the range from 5.4 to 7.2, the solution includingtrivalent chromium ions, andformate anions and/or oxalate anions as complexing agents for said trivalent chromium ions, in which the trivalent chromium ions with respect t...

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Bibliographische Detailangaben
Hauptverfasser:	KURTZ, Olaf, FOONG, Tse-Cheen, RÜTHER, Robert, JOKO, Setyadi-Lie
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	The present invention relates to an aqueous passivation solution having a pH in the range from 5.4 to 7.2, the solution includingtrivalent chromium ions, andformate 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.