Abstract:
Anodization treatment is useful technique of surface its forms coatings of hydroxide and anodic oxide which is very protective and it can improve the wear resistance anti-corrosion properties, enhance surface adhesion. Anodization is performed on pure magnesium in alkaline solution of sodium hydroxide under constant current of 1A and voltage of 40 V and 60 V at 37°C. The anodic film structure, surface morphology is observed with different techniques. Magnesium that was anodized at 60V showed better oxide coating than that was anodized at 40V, however, due to high voltage, sparking occurred in the coating. At applied voltage which is higher than film breakdown voltage the film breakdown occurs because of sparking. The anodic film formed is associated with large cracks due to breakdown of film at higher voltage. Coating porosity also played a major role in its properties. Anodized samples of magnesium along with samples with no prior surface treatment were placed in SBF for different time period of 2, 4 and 8 days at 37±10C in incubator with stirring at 250 r.p.m. The samples were then checked for change in their surface morphology using different techniques.
