Anodic coating of magnesium alloys

Abstract

Magnesium alloys may be anodized in a bath of sodium phosphate, (NaH2POj .-H20) and sodium dichromate, (Na2Cr207.2H20). The film obtained combines both corrosion-resistance and paint-holding properties, without serious change of dimensions of the treated piece, even on machi ned ·surfaces. CONTENTS I. Introduction ______ ___ _____ ______ ________ _____ ___ ____ ____ ____ _ II. Bath composition __ ___ ____ __________ ____ ______ _________ ______ _ III. Procedure _______________ ____________________________________ _ IV. Bath controL __ __ ___ _______ ___________ ____ _____ ___ ____ ______ _ V. Properties of anodic film ____ _________ ___ ______ ______ ___ __ ____ _ _ VI. Summary ___________ _____ ______ __ ____ ____ ___ ________________ _ VII. Selected references __________________ ______ __ ____________ _____ _