Forming corrosion-inhibiting anodized coating on bio-corrodible magnesium alloy implant, treats implant in aqueous or alcoholic solution containing specified ion concentration

摘要

The implant surface is treated with an aqueous or alcoholic conversion solution. This contains one or more ions selected from: K +, Na +, NH 4+, Ca 2+, Mg 2+, Zn 2+, Ti 4+, Zr 4+, Ce 3+, Ce 4+, PO 33-, PO 43-, HPO 4-, OH -, BO 33,B 4O 73-, SiO 32-, MnO 42-, MnO 4-, VO 3-, WO 42-, MoO 42-, TiO 32-, Se 2-, ZrO 32-and NbO 4-. The concentration of the ion or ions is in the range of 10 -2mol/l to 3 mol/l. Further variants of the treatment solution are elaborated in accordance with the foregoing principles. The treatment is effected by anodic oxidation, with a potential applied to the implant. It is alternatively effected by immersing the implant in the conversion solution. The layer thickness of the coating produced on the implant is in the range 300 nm to 20 mu m. An independent claim IS INCLUDED FOR the treated implant.