Optimization of AZ80 magnesium alloy anodizing by using Taguchi method

In this study, anodizing of AZ80 magnesium alloy by using different parameter were investigated. The Taguchi method was employed to investigate the effect of process parameter, namely anodizing potential, treatment time and electrolyte concentration on corrosion behaviour on anodized AZ80 magnesium alloy. The data were statistically analysed using Minitab software to predict the optimal combination of processing parameter. It was found that the factor that give biggest influence to the corrosion resistance of the anodic film is voltage, followed by Sodium Hydroxide, Sodium Silicate, Sodium Phosphate and finally treatment time. The optimum parameter is achieved by combination of 10 min of treatment time, 30V of potential, and 80, 40 and 30 g/L concentration of potassium hydroxide, sodium silicate and sodium phosphate.