High Corrosion Resistant Surface Treatment Coating Method of Magnesium Die-Casting Alloy

摘要

According to the present invention, a high-corrosion-resistant surface treatment coating method for a magnesium diecasting alloy includes the following steps of: (a) casting and post-treating a magnesium alloy material; (b) coating the magnesium alloy material with Al and forming an intermetallic compound after the step (a); (c) pretreating and painting the magnesium alloy material after the step (b); and (d) plating the magnesium alloy material after the step (c). Therefore, Mg17Al12 and Mg2Al3 layers, which are Mg-Al intermetallic compounds, are formed to secure high-corrosion resistance, and glosses of various colors can be maintained without discoloration caused by the aging of colors after the elapse of a predetermined time, and also, weight lightening and a cost reduction are possible.