Corrosion measurement apparatus and galvanic coupon and gasket t

Details Corrosion measurement apparatus and galvanic coupon and gasket t Corrosion measurement apparatus and galvanic coupon and gasket t

1996-05-24

1997-06-17

Raevis, Robert

Measuring and testing

Embrittlement or erosion

G01N 1700

Patent

active

056399596

ABSTRACT:
The present invention includes an improved gasket and coupon for use with a corrosion measurement system. The gasket includes a pair of collar portions which fit into an end of the coupon. The central rib of the gasket has a pair of beveled faces each of which fit flush with the exterior edge of a coupon when the coupon and gaskets are pressure fit into the sleeve. The central rib includes a flat outer edge that contacts the inner wall of the sleeve to stabilize the coupon within the sleeve and to prevent liquid from leaking between two adjacent gaskets. The coupon includes a first material, copper, a portion of which is coated with a second material, lead/tin, such that a galvanic cell is formed. Preferably, the lead/tin coating is placed on the interior and exterior of the upper or lower half of the coupon, the other half of the galvanic cell of the coupon remains uncoated copper. Thus, a galvanic cell more representative of the soldered pipe joint is formed allowing for more precise corrosion test results to be obtained.

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