The anodic film formed on magnesium alloy, AZ80 using alternating current (AC) power supply is studied and the effect of different anodizing parameters on the film formed is focused. Anodizing is carried out in different concentration and temperature of sodium silicate, Na2SiO3 solution for 15 minutes. The effects of concentration and temperature of Na2SiO3 on surface roughness and morphology of AZ80 are studied by using profilometer and scanning electron microscope (SEM); respectively. The anodizing parameters are focused on concentration and temperature of Na2SiO3. In order to analyse the phase composition of AZ80 before and after anodizing, x-ray diffraction (XRD) is used. As the concentration of Na2SiO3 increased, the surface roughness decreased and increased at 0.8 M. The surface roughness increased along with the increased temperature of Na2SiO3. The oxide film formed on the AZ80 consists of MgO and Mg2SiO4.
