Abstract

　A method for manufacturing a magnesium alloy product, characterized in that the surface of a lithium-containing magnesium alloy is treated with an aqueous solution containing hydrogen fluoride, and then an anodic film is formed on said surface by anodization. Said aqueous solution preferably contains 0.5 to 10 mol/L of hydrogen fluoride and has a pH of 1 to 5. It is thus possible to form, using a simple method, an anodic film with excellent corrosion resistance on the surface of a lithium-containing magnesium alloy.

IPC Classes  ?

• C25D 11/30 - Anodisation of magnesium or alloys based thereon
• C23F 1/22 - Acidic compositions for etching magnesium or alloys thereof
• C23G 1/12 - Light metals

Abstract

A method for manufacturing a magnesium-alloy product, said method being characterized in that the surface of a calcium-containing magnesium alloy is treated by an aqueous solution containing hydrogen fluoride and then anodized, forming an anodic oxide film on said surface. The magnesium alloy preferably contains at least 80 wt.% magnesium and 0.1-5 wt.% calcium. The aqueous solution preferably contains 0.5-10 mol/L hydrogen fluoride and has a pH between 1 and 5, inclusive. This makes it possible to easily form a highly corrosion-resistant anodic oxide film on the surface of a calcium-containing magnesium alloy.

IPC Classes  ?

• C25D 11/30 - Anodisation of magnesium or alloys based thereon
• C23F 1/22 - Acidic compositions for etching magnesium or alloys thereof
• C23G 1/12 - Light metals