Effect of silicon in Al-Si alloys on corrosion behavior in NaCl solution

Abstract

The effect of silicon on corrosion behavior of Al-Si alloys has been investigated by means of immersion corrosion test and electrochemical mesurements. The corrosion weight loss increased with increasing silicon content in Al-Si alloys. Corrosion of Al-Si alloys in aerated 0.1 M NaCl solution has been controlled by the cathodic process of water reduction which reacts on the eutectic silicon which is segregated.