Cathodic protection system

Details Cathodic protection system Cathodic protection system

2007-01-09

2007-01-09

Bell, Bruce F. (Department: 1746)

Electrolysis: processes, compositions used therein, and methods

Electrolytic material treatment

Metal or metal alloy

C205S730000, C204S196360, C204S196370, C204S196100, C204S196180, C204S196190, C204S196230, C204S196240, C204S196250

Reexamination Certificate

active

10490349

ABSTRACT:
The cathodic protection system of a concrete structure (22) uses sacrificial anodes such as zinc, aluminum and alloys thereof embedded in mortar. A humectant is employed to impart high ionic conductivity to the mortar in which the anode is encapsulated. Lithium nitrate and lithium bromide and combinations thereof are preferred as the humectant. The anode (10) is surrounded by a compressive, conductive matrix (12) incorporating a void volume between 15% and 50% to accommodate the sacrificial corrosion products of the anode. A void space of at least 5% of the total volume of the anode (12) may be provided opposite to the active face of the anode. Synthetic fibers such as polypropylene, polyethylene, cellulose, nylon and fiberglass have been found to be useful for forming the matrix. A tie wire is used to electrically connect the anode to the reinforcing bar.

REFERENCES:
patent: 5968339 (1999-10-01), Clear
patent: 6022469 (2000-02-01), Page
patent: 6165346 (2000-12-01), Whitmore
patent: 6217742 (2001-04-01), Bennett
patent: WO 01/40547 (2001-07-01), None

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