| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnesium material for a living body, which is improved in corrosion resistance by surface modifying. SOLUTION: This biological magnesium material consists of metal magnesium of >=99.9% in purity as a base material and is formed with a decomposition layer on its front surface by forming an oxide layer on the front surface of the base material, then removing the whole or part of the oxide layer. After the metal magnesium is worked to the biological member, the oxide layer is formed on the front surface of the biological member by heat treating the member in an oxidation atmosphere and further the whole or part of the oxide layer is removed, by which the decomposition layer is formed. Accordingly, when the metal magnesium formed with a rigid film is brought into contact with biological fluid, Ca, P, Cl, etc., penetrate the same and the film having the excellent corrosion resistance may be obtained. |
