Corrosion Kinetics of AlMg2 Alloy in Water With pH From 4 to 9 at Temperature of 40-800C

The research of ALMg2 corrosion has been done to study kinetics and mechanism corrosion. Corrosion experiment was carried out using water under controlled pH from 4 up to 9 at temperature of 40-800C within 5-30 days by discontinue gravimetric method. The result shows that increasing rate of weight over the surface area unit of ALMg2 occurs logarithmically in the pH of 4 at temperature of 40 and 600C. In the other hand that rate of weight over the surface area unit is decreasing linearly at temperature of 800C. The rate of change weight over the surface area unit of ALMg2 increase logarithmically in pH of 6,5 and temperature from 40 up to 800C so do that of condition in pH of 9 at temperatures of 40 and 600C. Meanwhile,the rate of changed weight over the surface area unit increase linearly toward corrosion time within 5-15 days and then that decrease linearly in 20-30 days duration at constant temperature of 800C. The corrosion mechanisms on ALMg2 surface occurred in the pH solution from 4 up to 9 and at temperature of 40-600C, pH of 6,5 at temperature of 800C and that pH of 9 at temperature of 800C within 5-15 days. Erosion process on ALMg2 surface occurs in both solution of pH 4 and 9 at temperature of 800C during 20-30 days