The invention belongs to the technical field of
metal surface treatment, and discloses a method for rapid electrolytic-deposition of a
coating on a surface of a
magnesium alloy. According to the method,
sand blasting equipment is adopted for carrying out
sand blasting treatment on the surface of the
magnesium alloy, then ultrasonic cleaning is carried out on the surface of the
magnesium alloy, anda
coating material is sprayed on the surface of the
magnesium alloy which is subjected to the
sand blasting treatment by adopting a cold spraying method; the working gas of the cold spraying is
compressed air, wherein the pressure is 0.6 MPa to 0.8 MPa, the preheating temperature of the cold spraying gas is 400-600 DEG C, the
powder feeding distance is 10 mm, the relative
moving speed of a nozzleis 600-2000 mm / min, and a cold-sprayed
copper-based
coating is prepared; and the cold-sprayed
copper-based coating is placed in an
electroplating solution,
electroplating parameters are set, and a
composite coating of a
copper base and an
electroplating layer is prepared through electroplating. The
composite coating is good in
microstructure and stable in
physical property, the
bonding strength of the cold-sprayed coating and the base material is high, the thickness of the cold spraying layer and the base material is controllable, and the
composite coating has excellent
corrosion resistance and
wear resistance. According to the method, the electroplating process of the
magnesium alloy is simplified, and the
pollution to the environment is reduced.