Title: Apparatus for controlled potential pitting corrosion protection of long, narrow stainless steel tubes

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.

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Inventors: Beese, Ronald E. (Barrington, IL, US)
Parikh, Niranjan M. (Winnetka, IL, US)

Application Number: 822349
Filing Date: 1977-08-05
Publication_date: 1979-05-01
Assignee: American Can Company (Greenwich, CT)
Primary Class(es): 204/196.15
Other Classes:
US Patent Ref:

1804078	May, 1931	Badan	204/197.
2513124	Jun, 1950	Weiks	204/197.
2784156	Mar, 1957	Maurin	204/197.
3182007	May, 1965	Hutchison et al.	204/147.
3477930	Nov, 1969	Crites	204/197.

Other Refs:
Primary Examiner: Williams, Howard S.
Assistant Examiner:
Attorney: Auber; Robert P., Ziehmer; George P., Hargis, III; Harry W.