Portable, hand-held, in-situ electrochemical sensor for evaluati

Details Portable, hand-held, in-situ electrochemical sensor for evaluati Portable, hand-held, in-situ electrochemical sensor for evaluati

1998-06-08

2000-04-25

Warden, Sr., Robert J.

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For corrosion

205777, 2057915, 204404, 73 86, 324 712, 324693, 324700, G01F 164, G01N 1704

Patent

active

060540389

ABSTRACT:
A hand-held and flexible corrosion sensor is described that uses electrochemical impedance spectroscopy (EIS, also known as AC impedance) to detect coating degradation and corrosion of coated and uncoated metals. The hand-held and flexible corrosion sensor is pressed against the surface of the structure of specimen to be inspected, and may be either straight in structural configuration in the form of a pen or bent in a curved or angled manner to achieve better access to the structure. An EIS spectrum can than be obtained in the field or under arbitrary conditions and the degree of coating or material degradation can be determined from the resultant spectrum. There are no restrictions on the configuration of the structure being inspected. The area of detection is controlled by moderating the extent and degree of wetness of the surface. A dry surface will provide a localized measurement; a wet surface will allow inspection of the wetted area.

REFERENCES:
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patent: 5221893 (1993-06-01), Kondou et al.
patent: 5426373 (1995-06-01), Diamond et al.
patent: 5746905 (1998-05-01), Murray
patent: 5859537 (1999-01-01), Davis et al.
patent: 5896034 (1999-04-01), Marshall

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