Laborator evaluation of the effects of ozone on corrosion rates and pitting of engineering alloys

摘要

Cyclic polarization experiments were performed on 1018 steel, yellow brass, and 6061-T6 aluminum in ozonated and non-ozonated tap water under stagnant condition to evaluate pitting and corrosion tendency of these engineering metals. Results show that the corrosion rates of 1018 carbon steel in tap water under stagnant condition increases about three-fold with the injection of ozone (0.05-0.1 ppm). No considerable changes in the corrosion rate occurred for yellow brass and aluminum when ozone was added under similar conditions. Study of the pitting behavior of the materials also demonstrated that ozone did not increase pitting when injected into the test solution for yellow brass. But in the case of 1018 carbon steel and aluminum, pitting is more pronounce.