Apparatus for controlled potential pitting corrosion protection

Details Apparatus for controlled potential pitting corrosion protection Apparatus for controlled potential pitting corrosion protection

1977-08-05

1979-05-01

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

C23F 1300

Patent

active

041522362

ABSTRACT:
Zinc or iron sacrificial anodes, or the cathodic current from a DC current source applied through a platinum electrode, provide stainless steel protection from pitting corrosion particularly in the interior of long narrow stainless steel tubes exposed to hot concentrated chloride brine. The invention is characterized by the placing of an anode in a brine solution near one end and electrically connected to a stainless steel tube, thereby protecting the interior of the stainless steel tube along its entire length from pitting corrosion by the brine.

REFERENCES:
patent: 1804078 (1931-05-01), Badan
patent: 2513124 (1950-06-01), Weiks
patent: 2784156 (1957-03-01), Maurin
patent: 3182007 (1965-05-01), Hutchison et al.
patent: 3477930 (1969-11-01), Crites

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