Corrosion protection of Mg-1%Zn and Mg-6%Zn orthopedic implant alloys in simulated body fluid

Abstract

The present study investigates the use of four bathes I , II, III and IV in electrodeposition on two different alloys Mg - 1% Zn and Mg - 6% Zn. The experimental results obtained and their interpretation is included in chapter III. Chapter III deals with electro plating for the four bathes containing Ca(NO3)2 as the calcium ion source, di-ammonium di- hydrogen phosphate NH4H2PO4 as the phosphate ion source, sodium nitrate NaNO3 to increase conductivity, hydrogen peroxide (H2O2) to erase at pot 1.4V.

Coat Bath I Bath II Bath III Bath IV Composition CaNO3 9.90 g/l 9.90 g/l 11.00 g/l 11.00 g/l NH4H2PO4 2.87 g/l 4.00 g/l 2.87 g/l 4.00 g/l NaNO3 1.27 g/l 1.27 g/l 1.27 g/l 1.27 g/l Na3PO4 2.00 g/l 2.00 g/l 2.00 g/l 2.00 g/l H2O2 20.00 ml/l 20.00 ml/l 20.00 ml/l 20.00 ml/l

In part one the electrodeposition was studied of the four bathes on Mg-1%Zn alloy. The surface morphology of the coat have