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An apparatus for providing electrochemical corrosion protection to a process vessel, the apparatus comprises at least one anode in communication with the process vessel; a DC current supply being electrically coupled to the process vessel and to the at least one anode; and a potential control unit i

An apparatus for providing electrochemical corrosion protection to a process vessel, the apparatus comprises at least one anode in communication with the process vessel; a DC current supply being electrically coupled to the process vessel and to the at least one anode; and a potential control unit in communication with the DC current supply. The potential control unit is electrically coupled to the process vessel and to a reference electrode in communication with the process vessel. The current supplied by the DC current supply for passivating the process vessel is adjustable by the potential control unit. The process vessel may comprise at least one of duplex stainless steel and superaustenitic stainless steel.

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1. An apparatus for providing electrochemical corrosion protection to a stainless steel process vessel, the apparatus comprising: at least one anode in communication with the process vessel;a reference electrode in communication with the process vessel;a DC current supply electrically coupled to the

1. An apparatus for providing electrochemical corrosion protection to a stainless steel process vessel, the apparatus comprising: at least one anode in communication with the process vessel;a reference electrode in communication with the process vessel;a DC current supply electrically coupled to the process vessel and to the at least one anode; anda potential control unit electrically coupled to the process vessel and to the reference electrode,wherein the DC current supply is configured to supply a passivation current to the at least one anode,wherein the potential control unit is in communication with the DC current supply and is configured to adjust the passivation current supplied by the DC current supply,wherein the process vessel forms part of a scrubber system, andwherein the process vessel comprises at least one of duplex stainless steel and superaustenitic stainless steel. 2. The apparatus of claim 1, wherein the process vessel consists essentially of at least one of duplex stainless steel and superaustenitic stainless steel. 3. The apparatus of claim 1, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply based upon an electrochemical potential sensed by the reference electrode. 4. The apparatus of claim 3, wherein the scrubber system is a flue gas desulphurization scrubber system. 5. The apparatus of claim 1, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply so as to bring the process vessel to a passivation potential in the range of about −850 mV to about +500 mV relative to the reference electrode. 6. The apparatus of claim 1, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply so as to bring the process vessel to a passivation potential in the range of about −350 mV to about +400 mV relative to the reference electrode. 7. The apparatus of claim 1, wherein said at least one anode comprises a plurality of anodes, wherein said plurality of anodes comprises at least one anode positioned at a first height above a floor of the process vessel and at least one anode positioned at a second height above the floor of the process vessel. 8. The apparatus of claim 1, wherein said at least one anode is positioned in an interior of the process vessel and is inclined relative to a wall of the process vessel. 9. A method of providing electrochemical corrosion protection to a stainless steel process vessel, the method comprising: supplying a passivation current to at least one anode in communication with the process vessel, wherein the passivation current is supplied by a DC current supply that is electrically coupled to the process vessel and to the at least one anode, andadjusting the passivation current so as to apply a passivation potential to the process vessel, wherein the current is adjusted by a potential control unit that is electrically coupled to the process vessel and to a reference electrode in communication with the process vessel;wherein the process vessel comprises at least one of duplex stainless steel and superaustenitic stainless steel, andwherein the process vessel forms part of a scrubber system. 10. The method of claim 9, wherein the passivation current is adjusted based upon an electrochemical potential sensed by the reference electrode. 11. The method of claim 10, wherein the electrochemical potential sensed by the reference electrode is an electrochemical potential existing in an electrochemical system comprising the process vessel, the reference electrode and a process fluid contained within the process vessel. 12. The method of claim 9, wherein the passivation potential is in the range of about −850 mV to about +500 mV relative to the reference electrode. 13. The method of claim 9, wherein the passivation potential is the range of about −350 mV to about +400 mV relative to the reference electrode. 14. The method of claim 9, wherein said at least one anode comprises a plurality of anodes, and wherein said method further comprises positioning at least one of said plurality of anodes at a first height above a floor of the process vessel and positioning at least one of said plurality of anodes at a second height above the floor of the process vessel. 15. The method of claim 9, wherein said method further comprises positioning the at least one anode in an interior of the process vessel and inclining the at least one anode relative to a wall of the process vessel. 16. An apparatus for providing electrochemical corrosion protection to a process vessel, the apparatus comprising: at least one anode in communication with the process vessel;a reference electrode in communication with the process vessel;a DC current supply electrically coupled to the process vessel and to the at least one anode; anda potential control unit electrically coupled to the process vessel and to the reference electrode,wherein each anode comprises a first portion and a second portion,wherein the DC current supply is configured to supply a passivation current to the at least one anode,wherein the potential control unit is in communication with the DC current supply and is configured to adjust the passivation current supplied by the DC current supply, andwherein the process vessel forms part of a scrubber system. 17. The apparatus of claim 16, wherein the process vessel comprises at least one of duplex stainless steel and superaustenitic stainless steel. 18. The apparatus of claim 16, wherein the first portion is integral with the second portion. 19. The apparatus of claim 16, wherein the second portion is non-collinear with the first portion. 20. The apparatus of claim 19, wherein the second portion forms an angle of about 90 degrees with respect to the first portion. 21. The apparatus of claim 16, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply based upon an electrochemical potential sensed by the reference electrode. 22. The apparatus of claim 16, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply so as to bring the process vessel to a passivation potential in the range of about −850 mV to about +500 mV relative to the reference electrode. 23. The apparatus of claim 16, wherein the potential control unit is configured to adjust the passivation current supplied by the DC current supply so as to bring the process vessel to a passivation potential in the range of about −350 mV to about +400 mV relative to the reference electrode. 24. The apparatus of claim 16, wherein said at least one anode comprises a plurality of anodes, said plurality comprising at least one anode positioned at a first height above a floor of the process vessel and at least one anode positioned at a second height above the floor of the process vessel. 25. A method of providing electrochemical corrosion protection to a process vessel, the method comprising: supplying a passivation current to at least one anode in communication with the process vessel, wherein the passivation current is supplied by a DC current supply that is electrically coupled to the process vessel and to the at least one anode, andadjusting the passivation current so as to apply a passivation potential to the process vessel, wherein the passivation current is adjusted by a potential control unit that is electrically coupled to the process vessel and to a reference electrode in communication with the process vessel,wherein each anode comprises a first portion and a second portion, andwherein the process vessel forms part of a scrubber system. 26. The method of claim 25, wherein the passivation current is adjusted based upon an electrochemical potential sensed by the reference electrode. 27. The method of claim 26, wherein the electrochemical potential sensed by the reference electrode is an electrochemical potential existing in an electrochemical system comprising the process vessel, the reference electrode and a process fluid contained within the process vessel. 28. The method of claim 26, wherein the electrochemical potential sensed by the reference electrode is an electrochemical potential existing an electrochemical system comprising the process vessel, the reference electrode and a flue gas. 29. The method of claim 28, wherein the flue gas comprises sulphur dioxide. 30. The method of claim 25, wherein the scrubber system is a flue gas desulphurization scrubber system. 31. The method of claim 25, wherein the passivation potential is in the range of about −850 mV to about +500 mV relative to the reference electrode. 32. The method of claim 25, wherein the passivation potential is in the range of about −350 mV to about +400 mV relative to the reference electrode. 33. The method of claim 25, wherein said at least one anode comprises a plurality of anodes, and wherein method further comprises positioning at least one of said plurality of anodes at a first height above a floor of the process vessel and positioning at least one of said plurality of anodes at a second height above the floor of the process vessel.