THE ELECTROLYTIC COLOURING OF ANODIZED ALUMINIUM BY MEANS OF OPTICAL INTERFERENCE EFFECTS

THE ELECTROLYTIC COLOURING OF ANODIZED ALUMINIUM BY MEANS OF OPTICAL INTERFERENCE EFFECTS

Anodized aluminium having an anodic oxide film of at least 3 microns thickness is colored by electrolytically depositing inorganic pigment from metallic salt solutions, particularly nickel, cobalt, tin and copper salts and mixtures. The pigment deposits are characterized by outer ends of an average...

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Bibliographische Detailangaben
Hauptverfasser: TAHEI ASADA, GRAHAM CHEETHAM, MICHEL BADIA, JOS PATRIE, PETER GEOFFREY SHEASBY
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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Zusammenfassung:Anodized aluminium having an anodic oxide film of at least 3 microns thickness is colored by electrolytically depositing inorganic pigment from metallic salt solutions, particularly nickel, cobalt, tin and copper salts and mixtures. The pigment deposits are characterized by outer ends of an average size in excess of 260 A lying at a distance of 500 - 3000 A from the aluminium/aluminium oxide interface.