METHOD OF ANODISING ALUMINUM ALLOY PIECES

METHOD OF ANODISING ALUMINUM ALLOY PIECES

A method for anodizing a part made of aluminum or an aluminum alloy by immersing the part in an aqueous bath essentially comprising sulfuric acid at a concentration of 150 to 250 g/L and at a temperature of 5 to 25° C. A DC voltage according to a voltage profile comprising a voltage increased at a r...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DEDIEU, PAUL, BRUCELLE, OLIVIER, STEPHAN, CÉDRIC, PEDELMAS, DAVID, ROSSIGNOL, CLAUDE, COMBES, PHILIPPE, BARES, PIERRE, BRUET, SYLVAIN, GAZEAU, CÉLINE, ARURAULT, LAURENT, TURQ, VIVIANE
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:A method for anodizing a part made of aluminum or an aluminum alloy by immersing the part in an aqueous bath essentially comprising sulfuric acid at a concentration of 150 to 250 g/L and at a temperature of 5 to 25° C. A DC voltage according to a voltage profile comprising a voltage increased at a rate of 1 to 32 V/min is applied to the part. The voltage is maintained at a plateau voltage value of 12 to 20 V for a duration sufficient for obtaining, at the surface of the part, an anode layer having a thickness of 3 to 7 μm and/or a layer weight of 20 to 150 mg/dm2.