Abstract
Effects of P, Si, Mn, Cu and Al on the dissolution behavior of crevice corrosion were studied by using high purity 18Cr-14Ni and 14Cr-16Ni steels with systematic variations in alloying elements in 3% NaCl solution at 80°C via the moire method. It was found that while no major alloying effects were found in the initial stage of crevice corrosion, alloying does influence the behavior of crevice dissolution in the stationary growth stage of corrosion development. The dissolution rate of steady growth stage, VII, increases with increasing content of phosphorous at a fixed electrode potential, while it is found to remain constant at the repassivation potential for crevice corrosion which becomes increasingly noble with increasing phosphorus content.
