METHOD FOR SURFACE TREATMENT OF MAGNESIUM OR MAGNESIUM ALLOY BY ANODIZATION

PROBLEM TO BE SOLVED: To provide a method for the surface treatment of magnesium or a magnesium alloy by anodization to form an anodized oxide coating on the magnesium or magnesium alloy. SOLUTION: The method of surface treatment by anodizing comprises: a pretreatment step of removing impurities and...

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Hauptverfasser:	KIM HONG GYEUN, SEO KYU HWAN, SONG TAE SEUNG, LEE JAE EUN, HAN SEONG HO
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:	PROBLEM TO BE SOLVED: To provide a method for the surface treatment of magnesium or a magnesium alloy by anodization to form an anodized oxide coating on the magnesium or magnesium alloy. SOLUTION: The method of surface treatment by anodizing comprises: a pretreatment step of removing impurities and an oxide layer present on the surface of magnesium or a magnesium alloy using a strongly alkaline aqueous solution; and a micro-arc plasma anodization step of immersing the pre-treated magnesium or magnesium alloy in an alkaline electrolyte and applying a direct current having a current density of 3 A/dm2or less to the electrolyte to form a magnesium oxide coating. COPYRIGHT: (C)2011,JPO&INPIT