C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
204/119
C23F 13/00 (2006.01) D21C 9/10 (2006.01)
Patent
CA 1126691
1. TITLE OF INVENTION Monitor Assembly for Electrochemical Corrosion Pro- tection of Stainless Steel Bleach Plant Washers 2. ABSTRACT OF DISCLOSURE A monitor assembly is provided for monitoring the effectiveness of electrochemical crevice corrosion pro- tection of a stainless steel member. The assembly com- prises the combination of a number of elements namely, a mount electrically connected and secured to a stain- less steel member; an electrically non-conductive sleeve disposed on the mount; a frusto-conical central- ly apertured metal spacer disposed on the sleeve in electrical contact with the mount; a stainless steel centrally apertured monitor coupon disposed on the sleeve in electrical contact with the spacer; a seg- mented electrically non-conductive centrally apertured disc disposed on the sleeve in non-electrical contact with the monitor coupon; a second spacer, identical with the first disposed in non-electrical contact with the disc; a second monitor coupon identical to the first in contact with a second spacer; a second disc identical with the first disposed in the same way with the second monitor coupon; and, a centrally apertured locknut threaded onto the mount and holding the members on the sleeve under a predetermined, substantially constant mechanical stress. The face-to-face contact of the first coupon with the first spacer and the first segmented disc is identical to the face-to-face contact of the second coupon with the second spacer and the second segmented disc.
348215
Marcus & Associates
Pulp And Paper Research Insitute Of Canada
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