In situ sensor for critical corrosion conditions in a material

Details In situ sensor for critical corrosion conditions in a material In situ sensor for critical corrosion conditions in a material

1997-05-15

1999-04-20

Raevis, Robert

Measuring and testing

Embrittlement or erosion

324700, H01C 1700

Patent

active

058958436

ABSTRACT:
An in situ sensor for monitoring the degree of corrosion of rebar in a concrete structure relies on a four-point resistance measure of a test wire embedded in the concrete structure. The resistance across the wire is compared with the resistance of a reference wire, which is corrosion resistant. As corrosion advances, the cross-sectional area of the wire decreases, effectively increasing the resistance measured. The sensor may be used to measure corrosion inhibitor performance, and the effect of dilution.

REFERENCES:
patent: 4217544 (1980-08-01), Schmidt
patent: 4703253 (1987-10-01), Strommen
patent: 4762427 (1988-08-01), Hori et al.

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