Quantifying chloride-induced corrosion from half-cell potential

TY - JOUR

T1 - Quantifying chloride-induced corrosion from half-cell potential

AU - Dhir, R. K.

AU - Jones, M. R.

AU - McCarthy, M. J.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - The paper describes a study undertaken to examine a methodology to determine the rate and severity of chloride-induced corrosion of steel embedded in concrete using the half-cell potential test. Preliminary studies undertaken in the laboratory, using a wide range of concrete variables, indicated that an effective relationship between half-cell potential (Ecorr) and corrosion current (Icorr), from polarisation resistance measurements, did indeed exist. The study was subsequently extended to an external marine environment where sections of full-scale beam, slab and column elements were exposed to seawater attack for a period of 5 years. By instrumenting these elements prior to exposure, it has been possible to demonstrate that by establishing a local relationship between Ecorr and Icorr, the extent of corrosion damage can be reasonably estimated over the full section. The practical implications of this and a proposed test procedure are discussed.

AB - The paper describes a study undertaken to examine a methodology to determine the rate and severity of chloride-induced corrosion of steel embedded in concrete using the half-cell potential test. Preliminary studies undertaken in the laboratory, using a wide range of concrete variables, indicated that an effective relationship between half-cell potential (Ecorr) and corrosion current (Icorr), from polarisation resistance measurements, did indeed exist. The study was subsequently extended to an external marine environment where sections of full-scale beam, slab and column elements were exposed to seawater attack for a period of 5 years. By instrumenting these elements prior to exposure, it has been possible to demonstrate that by establishing a local relationship between Ecorr and Icorr, the extent of corrosion damage can be reasonably estimated over the full section. The practical implications of this and a proposed test procedure are discussed.

UR - https://www.scopus.com/pages/publications/0027698116

U2 - 10.1016/0008-8846(93)90081-J

DO - 10.1016/0008-8846(93)90081-J

M3 - Article

AN - SCOPUS:0027698116

SN - 0008-8846

VL - 23

SP - 1443

EP - 1454

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 6

ER -