Corrosion behavior of steel with different microstructures under various elastic loading conditions

Surface roughness of the specimens after corrosion product removed (a) bainitic steel; (b) dual phase steel. For both the bainitic and dual phase steels, the surface roughness of the specimens increased with time under each of the loading conditions. The applied load caused more serious damage to the specimens, and the damage under the dynamic loading condition was more serious than that under static condition as time increased. Besides, the surface roughness of the bainitic steels after 19.1 h and 191 h, respectively, was, in general, lower than that of the dual phase steels, which implies that the localized corrosion of the loaded specimen with a dual phase microstructure was more serious than that of the bainitic steel.