Optimization of the Electrochemical Acceleration for Actual Corrosion Behavior of Hot-Dip Aluminized Ferritic Stainless Steel in NaCl Solution

Abstract

The optimal applied potential for the acceleration of the corrosion of hot-dip aluminized ferritic stainless steel in 5 mass% NaCl solution was investigated using electrochemical techniques (open-circuit potential measurement, electrochemical impedance spectroscopy, potentiodynamic- and potentiostatic-polarization tests). The feasibility of the use of the potentiostatic polarization test as a method for the acceleration of actual corrosion behavior was proved by the corrosion potential and the pitting potential of each layer in the potentiodynamic polarization test. The optimal applied potential for the potentiostatic polarization test was selected through comparison of the surface and electrochemical impedance spectroscopy analysis.