Effect of pH on Corrosion Behavior of two Hull Steels in Seawater

Potentiodynamic polarization technique, electrochemical impedance spectroscopy (EIS) and weight loss methods were employed to study the effect of pH on the corrosion behavior of 1# and 2# hull steels in sea water. The experimental results showed that the corrosion potentials of 1# and 2# steels are a little higher at the pH of 9.5 in the pH scale of 6.5~9.5 , and their corrosion rates decreased almost linearly with increasing pH.