EP 0142219 A1 19850522 - Electrochemical pump protection.
Title (en)
Electrochemical pump protection.
Title (de)
Elektrochemischer Schutz von Pumpen.
Title (fr)
Protection électrochimique de pompes.
Publication
Application
Priority
CA 436887 A 19830916
Abstract (en)
A pump is provided herein for pumping a corrosive aqueous solution. The pump includes (i) a stainless steel or carbon steel casing; (ii) an inlet limb connected to the stainless steel or carbon steel casing; (iii) an outlet limb connected to the stainless steel or carbon steel casing; (iv) means electrically connecting the stainless steel or carbon steel casing to a source of negative or positive DC voltage. thereby to induce the stainless steel or carbon steel casing to act as an anode or as a cathode as required; (v) at least one reference electrode secured within at least one of the inlet limb and the outlet limb; (vi) at least one counter electrode secured within at least one of the inlet limb and the outlet limb; and (vii) control means for impressing a protection potential to the stainless steel or carbon steel casing at a predetermined voltage of -800 mVAg/AgC1 or more positive, the predetermined voltage being sufficient to draw the stainless steel or carbon steel casing into a zone of reduced corrosion. This structure protects the stainless steel or carbon steel casing of the pump from corrosion.
IPC 1-7
IPC 8 full level
C23F 13/00 (2006.01); C23F 13/02 (2006.01)
CPC (source: EP)
C23F 13/005 (2013.01); C23F 13/02 (2013.01)
Citation (search report)
- [A] DD 42284 A
- [A] DE 1253994 B 19671109 - KLEIN SCHANZLIN & BECKER AG
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0142219 A1 19850522; FI 843610 A0 19840914; FI 843610 L 19850317; JP S60221589 A 19851106
DOCDB simple family (application)
EP 84305346 A 19840807; FI 843610 A 19840914; JP 19141384 A 19840912