APPARATUS OF REMOVING MG ALLOY ADHERED TO EXTRUDING MOLD AND COMPOSITION OF CORROSION SOLUTION FOR REMOVING THE MG ALLOY

摘要

PURPOSE: A device for removing a magnesium alloy adhering to a mold for an extrusion and a composition of an etching solution for removing the magnesium alloy are provided to remove completely the magnesium alloy adhering to the mold for the extrusion regardless of a shape of a cavity. CONSTITUTION: A device for removing a magnesium alloy adhering to a mold for an extrusion comprises an etching bath (30) and an etching solution supply unit. The etching bath removes magnesium included in the magnesium alloy by a corrosion response, and an etching solution which is a basic or a neutral is filled. The etching solution supply unit supplies the etching solution to the etching bath from an outside of the etching bath. The etching solution supply unit comprises multiple fluid paths for supplying the etching solution and multiple containers. The etching solution supply unit comprises a first container (22) and a first fluid path (14) for supplying a first solution producing the corrosion response in the magnesium to the etching bath.