COMPOSITION FOR CHROMIUM PLATING A SUBSTRATE AND CHROMIUM PLATING PROCESS USING SUCH A COMPOSITION

COMPOSITION FOR CHROMIUM PLATING A SUBSTRATE AND CHROMIUM PLATING PROCESS USING SUCH A COMPOSITION

An aqueous composition for the electrolytic deposition of a chromium coating on the surface of a substrate is disclosed, in which it has a pH of between 0 and 1 and which contains a trivalent chromium salt, glycine, an alkali metal salt, an aluminium salt and, optionally, an ammonium salt. The chrom...

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Bibliographische Detailangaben
Hauptverfasser: ROSSIGNOL, Claude, BENABEN, Patrick, BOYER, Rosyne, MERDRIGNAC, Clémence, FORI, Benoit, BARES, Pierre, GAZEAU, Céline, STEPHAN, Cédric, BRUCELLE, Olivier
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:An aqueous composition for the electrolytic deposition of a chromium coating on the surface of a substrate is disclosed, in which it has a pH of between 0 and 1 and which contains a trivalent chromium salt, glycine, an alkali metal salt, an aluminium salt and, optionally, an ammonium salt. The chromium plating process according to the invention comprises the immersion of the substrate to be treated in this composition and the application of a current between this substrate and an anode. This process makes it possible to form a high-quality chromium coating on the entire surface of the substrate.