Electricity: measuring and testing – Determining nonelectric properties by measuring electric...
Patent
1997-07-02
1998-09-29
Do, Diep N.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
324425, 204404, G01N 2742
Patent
active
058149821
ABSTRACT:
A test station for measuring the effectiveness of cathodic protection including a cylindrical plastic reference tube extending downwardly through the soil to near the protected structure, such as a pipe. Two plastic coupon tubes extend within the chamber of the reference tube attaching to opposite sides of its interior sidewalls. First and second circular cylindrical rod-shaped coupons attach to, and sealingly engage, the bottom ends of the coupon tubes. Insulated conductors extend from attachment to each coupon upwardly through the coupon tubes. A first coupon is electrically connected to the pipe, and the second coupon is used to measure a free-corrosion (native) potential.
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Frank A. Perry, "A Review Of Stray Current Effects On A Gas Transmission Main In The Boston, Massachusetts Area", Nace International Annual Conference And Corrosion Show--Corrosion 94, Paper No. 590, pp. 1-13 (month unavailable).
Martin et al., "A Method For Determining Pipeline Polarised Potentials In Stray Current Areas Using Linear Regression Analysis", Industrial Corrosion, vol. 3, No. 3, May 1985, pp. 10-14.
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Cott Manufacturing Company, 1944 Gardena Avenue, Glendale, California 91204, "Finkprobe Integrated Steel Coupon Test Station" brochure (month available).
Cott Manufacturing Company, 1944 Gardena Avenue, Glendale, California 91204, "Big Fink Cathodic Protection Test Station" brochure (month unavailable).
Lawson Kurt M.
Thompson Neil G.
CC Technologies Systems, Inc.
Do Diep N.
Foster Frank H.
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