Piotr Dudek, Aleksander Fajkiel, Tomasz Reguła, Marzena Lech-Grega, Marek Nowak, Mieczysław Opyrchał

CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART II: DEVELOPMENT OF A TECHNOLOGY FOR FABRICATION OF DECORATIVE AND PROTECTIVE COATINGS ON MAGNESIUM ALLOY DIE CASTINGS

Abstract

The article presents the results of investigations of a technology for fabrication of decorative and protective chromate coatings on die castings made from AZ91 (MgAl9Zn1) magnesium alloy. As a result of the investigations, parameters of machining were developed as well as compositions of the bath of solutions to obtain satisfactory chromate coatings on products cast from magnesium alloys. Based on the casting surface topography, it was found that the chemical and phase compositions in the sub-surface layer of casting have a decisive influence on the quality of produced coatings.

Keywords: magnesium alloys, conversion coatings, protective-decorative chromate coatings, die casting,
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