Corrosion Monitoring of Carbon Steels under Humid Air Environment with Ozone Simulating Irradiation

Abstract

The effects of gamma-ray irradiation on the corrosion of carbon steels in humid gas-phase environments investigated by introducing ozone as a simulated oxidant produced by radiolysis under gamma-ray irradiation and by monitoring corrosion using corrosion sensors are introduced. The corrosion rate was increased with both relative humidity and ozone concentration. This is because the reduction reaction and the dissolution reaction of ozone in water were easier than those of oxygen, which resulted in the acceleration of the cathodic reaction. The introduction of ozone is considered to be effective as a corrosion acceleration test in a non-irradiated environment simulating gamma-ray irradiation.