Corrosion of iron in O·5M H2SO4containing hydrogen peroxide

Abstract

The dissolution kinetics of a rotating iron disc electrode in 0·5M H2SO4 containing 0·01−0·2M H2O2 have been investigated. It was found that at slow stirring rates the corrosion process was controlled by hydrogen peroxide diffusion, whereas at rapid stirring rates it followed intermediate kinetics. The effect of hydrogen peroxide concentration and stirring rate on the rates of the partial electrode processes was determined. An attempt to explain the inhibiting and stimulating effects of hydrogen peroxide on the anodic dissolution rate has been made.