THE ECO-FRIENDLY CHEMICAL CONVERSION METHOD FOR MAGNESIUM CAST MATERIAL AND MAGNESIUM CAST MATERIAL MANUFACTURED BY THE SAME

摘要

The present invention relates to an eco-friendly chemical treating method of a magnesium casting material capable of reducing wastewater treatment costs, easily expressing a primary color of paint in coating, and improving corrosion resistance and environmental resistance. Provided is the eco-friendly chemical treating method of a magnesium casting material comprising: a pretreating step of removing segregation or foreign substances on the surface of a magnesium casting material; and a step of forming a fluoride film on the surface of the magnesium casting material by dipping the magnesium casting material having gone through the pretreating step in a solution containing one or more selected from the group consisting of acidic ammonium fluoride (NH_4HF_2) and sodium fluoride (NaF).