Experimental Study of Sulphate Attack on Steel Embedded in Reinforced Concrete

Dr. Ashutosh S. Trivedi; R.P. Sharma

Abstract

Corrosion is one of the biggest problems of steel in reinforced concrete (RC) structure, whichdeteriorates the durability of concrete structure at a considerable rate. In this paper, we havestudied the corrosion density, corrosion rate, and resistivity to a solution of 0.78 N H2SO4withthe help of electrochemical process to a temperature range of 307–309±1 K by using SternGeary equation and Tafel slope on 12 and 8 mmφ bar. The current work gives a deep reviewon the corrosion rate and weight loss caused due to sulphuric acid attack on steel embeddedin concrete in existing and new infrastructure as well as building infrastructure. The resultobtained shows that corrosion rate of mild steel bar of 8 mmφ in H2SO4 is fast as compared to12 mmφ bar taken periodically.Keywords: Corrosion, Fe 415 mild steel, electrochemical, resistivity, corrosion rate, sulphuricacid