Research on the Preparation of Magnesium Alloy Micro-Arc Oxidation Black Ceramic Membrane

Abstract

Black ceramic membranes are made on the surface of AZ31B magnesium alloy to further study the micro-arc oxidation coloring ceramic membranes with more colors.In the system of sodium silicate - copper sulfate, black ceramic membrane with good compactness and uniform color can be made while the concentration of sodium silicate is 20g/L and the concentration of copper sulfate is 1.0g/L. Experimental results show that the chroma of the membrane varies from light color system to deep color system with the increasing content of copper aluminum compounds.

In situ Micro‐Arc Oxidation‐Induced Growth of Black Ceramic ZrO2 and CuO Coatings on Magnesium Alloys and their Electrochemical Analysis

“…At present, the main coloring methods of magnesium alloy surfaces include chemical transformation, [7,8] anodic oxidation, [9,10] electroplating, [11,12] laser treatment, [13,14] and micro-arc oxidation (MAO). [15][16][17][18][19] Among various development strategies, MAO can effectively protect the metal substrate and make it have high hardness, good wear resistance and strong corrosion. Thus, it was considered to be one of the most effective technologies for in-situ growth of ceramic coatings on the surface of non-ferrous metals.…”