Monitor assembly for monitoring anodic corrosion protection...

G - Physics – 01 – N

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Details

324/23, 204/88

G01N 27/30 (2006.01) C23F 13/04 (2006.01) G01N 17/02 (2006.01)

Patent

CA 1218112

ABSTRACT OF THE DISCLOSURE monitor assembly is provided herein for monitoring the effectiveness of anodic protection of carbon steel vessels containing a corrosive liquor, e.g. pulp digesters. The monitor has two identical carbon steel monitor coupons mounted on a mount rod, one coupon being in electrical connection with the anodically- protected carbon steel vessel, the other being out of electrical connection with such vessel. A reference electrode is mounted on the same mount rod in such a way that the reference electrode, but not the mount rod, is wetted by the liquid contents within the carbon steel vessel. In this novel combination of elements, the mount rod, the metal components of a sealing gland and a metal spacer disc are made of any metal with sufficient mechanical and chemical stability to withstand the corrosive environment of the liquid contents of the carbon steel vessel, as well as being able to withstand the mechanical stress. An electrically-non- conductive sleeve and electrically-non-conductive spacer elements are formed of any electrically-non-conductive material having sufficient mechanical and chemical stability to withstand the corrosive environment of the liquid contents of the carbon steel vessel, as well as being able to withstand the mechanical stress. The reference electrode is formed from any metal which provides a stable potential when exposed to the liquid contents of the carbon steel vessel.

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