Monitor assembly for monitoring anodic corrosion protection of c

Details Monitor assembly for monitoring anodic corrosion protection of c Monitor assembly for monitoring anodic corrosion protection of c

1986-01-28

1986-12-09

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 204196, 204286, 204435, 204400, G01N 2746, C23F 1300

Patent

active

046279059

ABSTRACT:
A monitor assembly is provided herein for monitoring the effectiveness of anodic protection of a carbon steel vessel containing a corrosive liquor, e.g. pulp digesters. The monitor has two identical carbon steel coupons mounted on a mount rod, one coupon being in electrical connection with the anodically protected 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 of 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 and 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 and 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.

REFERENCES:
patent: 3009865 (1961-11-01), Mueller et al.
patent: 3462353 (1969-08-01), Evert et al.
patent: 3660264 (1972-05-01), Schuller
patent: 3980542 (1976-09-01), Winslow et al.
patent: 4285232 (1981-08-01), Garner

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