▎ 摘　　要

NOVELTY - Preparation of conductive anti-corrosion coating layer on surface of magnesium alloy micro-arc oxidation layer, involves polishing AZ91 magnesium alloy to obtain bright surface, performing micro-arc oxidation treatment on the magnesium alloy using micro-arc oxidation electrolyte, adding pyrrole monomer and sodium benzenesulfonate to deionized water or graphene suspension, adding an oxidant solution to obtain polypyrrole conductive material (A) or polypyrrole/graphene conductive composite material (B), dissolving 1-2 pts. wt. material (A or B), 10-15 pts. wt. epoxy resin and 4-6 pts. wt. polyamide curing agent in 6-10 pts. wt. n-butanol, spin-coating obtained conductive anti-corrosion coating on the surface of the micro-arc oxidation layer, and drying. The oxidant is ferric chloride. The molar ratio of pyrrole monomer, sodium benzenesulfonate and ferric chloride is 1-1.5:0.5-0.75:2-2.5. The usage amount of graphene is 10-20 wt.% with respect to pyrrole. USE - Preparation of conductive anti-corrosion coating layer (claimed) on surface of magnesium alloy micro-arc oxidation layer. The magnesium alloy is used in vehicle, aerospace, biological application and electronic product. ADVANTAGE - The method is simple and low cost. The coating obtained by the method has a certain conductive ability and a certain corrosion resistance.