METHOD FOR SURFACE TREATMENT OF MAGNESIUM OR MAGNESIUM ALLOY BY ANODIZATION

Disclosed herein is 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. The method comprises: removing impurities and an oxide layer present on the surface of magnesium or a magnesium alloy using a...

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Hauptverfasser: KIM HONG GYEUN, SEO KYU HWAN, SONG TAE SEUNG, LEE JAE EUN, HAN SEONG HO
Format: Patent
Sprache:eng
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Zusammenfassung:Disclosed herein is 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. The method comprises: removing impurities and an oxide layer present on the surface of magnesium or a magnesium alloy using a strongly alkaline aqueous solution (pretreatment); and immersing the pretreated magnesium or magnesium alloy in an alkaline electrolyte and applying a direct current having a current density of 3 A/dm2 or less to the electrolyte to form a magnesium oxide coating (microarc plasma anodization).