Electrochemical noise analysis of the corrosion behaviors of Al-Zn-In based alloy in NaCl solution

The corrosion behaviors of Al-5Zn-0.02In-1Mg-0.05Ti (wt. %) alloy immersion in 3.5% NaCl solution were analyzed using electrochemical noise. At the initial immersion, the potential noise due to the pitting shows small fluctuation of less than 1 mV about 5 s intervals. After 10 h immersion, the potential noise due to the dissolution/precipitation shows larger fluctuation about 5 mV at 10 s intervals. In the later corrosion, the potential noise caused by the uniform corrosion shows the fluctuation about 10 mV at 60 s intervals. (C) 2013 The Authors. Published by Elsevier B.V.