Method and apparatus for detecting and monitoring corrosion

Details Method and apparatus for detecting and monitoring corrosion Method and apparatus for detecting and monitoring corrosion

1996-05-17

1999-04-20

Brown, Glenn W.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324693, 204404, 2057765, 205777, G01N 1704, G01N 2704

Patent

active

058960341

ABSTRACT:
Corrosion is monitored by making a resistance measurement between a contact and an uncorroded or relatively uncorroded portion of the article to be monitored. Changes in the resistance measured are a result of the presence of a corrosion product, or the breakdown of protective coatings by corrosion. The contact may be a sensor washer which is held in place around a threaded stud 6 by nut 12. The washer comprises a steel ring 14 and an electrically conducting ring 18 which is insulated from ring 14 and contacted by circling 21 and conductor wire 23 in resin jacket 22. The measurement may be made on magnesium alloy gearboxes in helicopter. The alloy may be protected by a paint film so that the initial resistance measured is very high.

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