Effects of Particle Size Distribution on Corrosion Rate of Carbon Steel in Soil

Abstract

Brown lowland soil collected from 20 sites was prepared, and the corrosion rate of buried carbon steel was measured by AC impedance method. In this study, soil corrosiveness was defined as the progress of corrosion in one dry/wet cycle, and its relationship with the soil particle size distribution was evaluated. The soil corrosiveness was different depending on particle size distribution. It is considered that the wet area of the steel surface and the diffusion distance of dissolved oxygen were different by the inter-particle spacing.