Patent ID: 7368047

Claim:
A method of preparing a copper plating layer having high adhesion to a magnesium alloy through electroplating, comprising: pretreating the magnesium alloy with a plating pretreatment solution to form a film for electroplating, serving as a magnesium alloy pretreatment layer, exhibiting a uniform current distribution; and conducting copper electroplating on the magnesium alloy pretreatment layer to form the copper plating layer firmly adhering to the magnesium alloy pretreatment layer, wherein, if the copper plating layer is removed by force, the surface of the magnesium alloy adhering to the copper plating layer exhibits coarse grains contained in the pretreatment layer, wherein the copper electroplating layer is formed by sequentially conducting on the magnesium pretreatment layer a copper cyanide electroplating; and at least one of a copper pyrophosphate (CuP 2 O 7 ) electroplating and a copper sulfate electroplating.