Corrosion Rate of Aluminum Alloy in Moving Sodium Chloride Solution

Abstract

The corrosion rates of rotating aluminum alloy disck were estimated from the measurement of the polarization resistance and electrochemical impedance spectroscopy in 3.5 mass% sodium chloride solution (pH 8.2) at 273K. The corrosion rate of aluminum alloy increased with increase of rotational speed and had a constant value at all immersion times. Corrosion current measured by polarization resistance and electrochemical impedance spectroscopy and corresponded with that from weight loss. It is found that above each technique are a convenient tool for monitaring of the corrosion processes of rotating aluminum alloy.