Two-Stage Settling Approach to Purify Mg Alloy

摘要

Poor corrosion resistance, especially galvanic corrosion related to impurities, greatly limits the application of magnesium alloys. In the current work, iron content distribution in Mg melts and solidified alloys, as well as settling velocity of Fe-containing particles during settling process, was calculated. Based on the calculation, a new purification process, two-stage settling method, was designed to purify the Mg alloy by reducing content of Fe impurities. The two-stage settling method was carried out using AZ91 alloy as the sample material.