Preparation method of SiC reinforced aluminum matrix composite surface micro-arc oxidation film layer

The invention relates to a preparation method of a SiC reinforced aluminum matrix composite surface micro-arc oxidation film layer, which comprises the following steps: carrying out micro-arc oxidation treatment on a SiC reinforced aluminum matrix composite by using a composite electrolyte taking silicate and phosphate as main salts and adopting an alternating current bipolar pulse power supply to obtain the SiC reinforced aluminum matrix composite surface micro-arc oxidation film layer, according to the method, pretreatment is simple, the electrolyte is environmentally friendly and non-toxic, the anti-pollution capacity of the electrolyte is high, the regeneration and reuse rate is high, and sewage discharge is reduced; the ceramic film layer prepared by adopting the electrolyte of the Na2SiO3-(NaPO3) 6 composite system is uniform and compact, high in wear resistance and good in corrosion resistance, the technological process is simple, and batch production and industrial application are facilitated. 一种SiC增强