Patent ID: 7854787
Filing Date: 2010-12-21
Classification: C22B,C23G,Y02P

Abstract:
1. A method of making a recycled magnesium alloy comprising: a coating removing step which includes a first treatment of immersing a coated magnesium alloy product in a first alkaline solution, and a second treatment of immersing the magnesium alloy product in a second alkaline solution or in an acid solution, the second alkaline solution being different from the first alkaline solution; a melting step of melting the magnesium alloy product to provide molten metal; a component analyzing step for determining a content of at least one component contained in the molten metal; and a component controlling step for controlling the content of the component in the molten metal; wherein the coating includes an undercoat layer made of a first resin and an overcoat layer made of a second resin different from the first resin, the first treatment step being performed for removing the overcoat layer at least partially by causing the overcoat layer to swell while also causing the undercoat layer to swell at portions where the overcoat layer is removed, and the second treatment step being performed for removing the undercoat layer at least partially; wherein a second flux is put into molten metal before the component controlling step, the second flux functioning to generate a gas for preventing the molten metal from oxidizing.