SEDL / STP / STP1137-EB / STP19760S

Utilization of Electrochemical Impedance Techniques to Estimate Corrosion Damage of Steel Infrastructures

Homma, K
Researcher of Steel Structure Development Center, Steel Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, Chiba-ken,

Goto, N
Senior Researcher of Steel Structure Development Center, Steel Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, Chiba-ken,

Matsuoka, K
Senior Researcher of Steel Structure Development Center, Steel Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, Chiba-ken,

Ito, S
Senior Research Chemist of Stainless Steel S Titanium Laboratory, Steel Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, Chiba-ken,

Pages: 15    Published: Jan 1992

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Abstract

Infrastructures such as bridges, highways, pipelines and harbor piers sometimes suffer from corrosion damage during their service life. To diagnose deterioration of infrastructures and secure effective maintenance, in-situ corrosion monitoring methods based on electrochemical impedance techniques have been developed. This paper reports three examples of new corrosion monitoring sensors: 1) a sensor for detecting corrosion of marine steel structures in seawater, 2) a sensor for detecting corrosion of reinforcing bars in concrete, and 3) a sensor for detecting coating deterioration of painted steel structures in the atmosphere. The effectiveness of these sensors has been verified by experiments both in the laboratory and in the field.