Long term study on the corrosion behaviour of buried mild steel under different native soil environments

Abstract Study on the corrosivity of mild steel in coastal area was carried out to understand the influence of corrosion factors on mild steel in long-term analysis. Two sites (A1 and A2) were selected based on soil geotechnical and physico chemical properties. Soil corrosion is a very slow process, so methodological approach was planned for a period of 3 years. Soil physico chemical composition, texture, moisture content are related to the corrosion rate. The results revealed that the corrosion rate of coupons buried in soil increases with moisture content and chloride content. Weight loss trend was in good agreement with PDP and impedance analysis. The surface morphology examined by SEM/EDAX, optical microscopy.