Experimental Study of Sulphate Attack on Steel Embedded in Reinforced Concrete

Abstract

Corrosion is one of the biggest problems of steel in reinforced concrete (RC) structure, which
deteriorates the durability of concrete structure at a considerable rate. In this paper, we have
studied the corrosion density, corrosion rate, and resistivity to a solution of 0.78 N H2SO4with
the help of electrochemical process to a temperature range of 307–309±1 K by using Stern
Geary equation and Tafel slope on 12 and 8 mmφ bar. The current work gives a deep review
on the corrosion rate and weight loss caused due to sulphuric acid attack on steel embedded
in concrete in existing and new infrastructure as well as building infrastructure. The result
obtained shows that corrosion rate of mild steel bar of 8 mmφ in H2SO4 is fast as compared to
12 mmφ bar taken periodically.
Keywords: Corrosion, Fe 415 mild steel, electrochemical, resistivity, corrosion rate, sulphuric
acid