Influence of Components of Simulated Acid Rain on Corrosion Behaviors of 1Cr18Ni9Ti Stainless Steel in Soil

The influence of components of simulated acid rain(SAR) on corrosion behaviors of 1Cr18Ni9Ti stainless steel in soil was studied by means of polarization curves and electrochemical impedance spectroscopy(EIS). The results indicated that the components of SAR obviously affected the corrosion behaviors of 1Cr18Ni9Ti stainless steel. When the concentration ratio of SO42- to NO3- of SAR decreased, the corrosion rate of the stainless steel would also decrease. EIS of 1Cr18Ni9Ti stainless steel consisted of two capacitive arcs, the corrosion was controlled by oxygen diffusion process.