The invention provides a micro-arc oxidation
ceramic membrane and a preparation method thereof. The preparation method comprises the steps of micro-arc oxidation treatment and hole sealing treatment. After a
magnesium alloy is subjected to micro-arc oxidation treatment, the
ceramic membrane with high
corrosion resistance and heat
radiation performance is generated on the surface, hole sealing treatment is carried out through hole sealing liquid, the compactness of the
ceramic membrane is enhanced, and the
corrosion resistance of the
ceramic membrane is further enhanced. The micro-arc oxidation
ceramic membrane and the preparation method have the following beneficial effects that after the
magnesium alloy is subjected to micro-arc oxidation treatment, and the
ceramic membrane with
high heat radiation performance is formed on the surface, so that the heat
radiation efficiency of the
magnesium alloy is improved; an additive containing glycerine and
tungstate is added into a micro-arc oxidation
electrolyte, components of the ceramic membrane are changed, the
corrosion resistance of the ceramic membrane is enhanced, and therefore the corrosion resistance of the
magnesium alloy is increased, and the service life is prolonged; and hole sealing treatment is carried out through the hole sealing liquid, the compactness of the ceramic membrane is improved, the corrosion resistance of the
magnesium alloy is further improved, and meanwhile the problem that the colors of micro-arc oxidation ceramic membranes in the current market are not abundant is solved.