US RE50,006 E1
Corrosion protection using a sacrificial anode
George Sergi, Walsall (GB); Attanayake Mudiyanselage Gamini Seneviratne, Solihull (GB); and David Whitmore, Winnipeg (CA)
Assigned to Vector Corrosion Technologies Ltd., Winnipeg (CA)
Filed by Vector Corrosion Technologies Ltd., Winnipeg (CA)
Filed on Aug. 21, 2020, as Appl. No. 16/999,744.
Application 16/999,744 is a continuation in part of application No. 13/553,498, filed on Jul. 19, 2012, granted, now 8,961,746, issued on Feb. 24, 2015.
Application 16/999,744 is a reissue of application No. 14/601,537, filed on Jan. 21, 2015, granted, now 10,053,782, issued on Aug. 21, 2018.
Int. Cl. C23F 13/02 (2006.01); C23F 13/04 (2006.01); C23F 13/06 (2006.01); C23F 13/08 (2006.01); C23F 13/10 (2006.01); C23F 13/20 (2006.01); E04C 5/01 (2006.01); C04B 111/26 (2006.01)
CPC C23F 13/08 (2013.01) [C23F 13/04 (2013.01); C23F 13/06 (2013.01); C23F 13/10 (2013.01); C23F 13/20 (2013.01); E04C 5/015 (2013.01); C04B 2111/265 (2013.01); C23F 2201/02 (2013.01); C23F 2213/22 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for corrosion protection of a metal section in a cast body of an ionically conductive concrete or mortar material comprising:
providing an anode assembly comprising:
an impressed current anode; and
a sacrificial anode of a material which is less noble than the metal section;
maintaining the impressed current anode electrically separated from the sacrificial anode to prevent direct electrical communication therebetween;
prior to installation, positioning the impressed current anode and the sacrificial anode into an [ a common ] assembly, wherein the impressed current anode and the sacrificial anode are fixed at relative positions in the [ common ] assembly;
installing the [ common ] assembly, while the impressed current anode and said sacrificial anode are at said fixed positions, in contact with the cast body of ionically conductive concrete or mortar material so as to locate the impressed current anode in ionic contact with the cast body of ionically conductive concrete or mortar material and so as to locate the sacrificial anode in ionic contact with the cast body of ionically conductive concrete or mortar material;
providing a DC power supply having a first pole and a second pole; the [ common ] assembly including [ a first ] electrical connecting components [ component ] connected to the impressed current anode and [ a second electrical component connected to ] the sacrificial anode; and providing corrosion protection to the metal section by:
providing a connection by the [ first ] electrical connecting components [ component ] of the first pole of the DC power supply to the impressed current anode;
providing a connection of the second pole of the DC power supply to the metal section; and
providing a connection [ by the second electrical component ] of the sacrificial anode to the metal section;
so that the impressed current anode by [ a ] current from the DC power supply provides the corrosion protection of the metal section;
and when the DC power supply [ or impressed current anode ] is not present [ functional ] a current between the metal section and the sacrificial anode provides the corrosion protection of the metal section.