Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment – Metal or metal alloy
Patent
1999-02-05
2000-12-26
Bell, Bruce F.
Electrolysis: processes, compositions used therein, and methods
Electrolytic material treatment
Metal or metal alloy
20419618, 20419619, C23F 1308
Patent
active
061653462
ABSTRACT:
An existing concrete structure is restored by embedding sacrificial anodes into the concrete layer at spaced positions over the layer and connecting the anodes to the reinforcing members to provide a cathodic protection against corrosion. Each anode is inserted into a drilled hole in the layer of sufficient depth to expose the reinforcement. A steel pin passes through a bore in the cylindrical anode and is attached to the reinforcement by arc welding or by impact so as to hold the anode rigidly within the hole. The hole is filled by a settable filler material. In order to maintain effective current conduction from the anode to the reinforcement through the filler over an extended period to maintain the required protection, there is added a material to hold the pH in a preferred range of the order of 12 to 14 and a deliquescent material to absorb moisture into the filler.
REFERENCES:
patent: 4265725 (1981-05-01), Tatum
patent: 5431795 (1995-07-01), Moreland
patent: 5609748 (1997-03-01), Kotowski
patent: 5968339 (1999-10-01), Clear
patent: 6022469 (2000-02-01), Page
patent: 6033553 (2000-03-01), Bennett
Norcure brochure "Is Salt Induced Corrosion Causing Problems with your Concrete Structures?" Nov. 1994.
Vector brocure "The Concrete Restoration and Protection Specialists" Mar. 1995.
Norcure brochure "Changing the face of concrete repair" No Month/Year available.
Battison Adrian D.
Bell Bruce F.
Thrifl Muracy E.
Williams Michael R
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