Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Maintaining environment nondestructive to metal
Patent
1993-11-12
1995-02-21
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Maintaining environment nondestructive to metal
106 1418, 106 1421, 252387, C23F 1100, C23F 1108
Patent
active
053913493
ABSTRACT:
The corrosion of ferrous-based metals imbedded in concrete containing a chloride is inhibited by drawing the chlorides away from the metal, and then applying a composition containing ammonium carbamate or ammonium carbonate to the concrete. An agent may be added to the solution to prevent any calcium hydroxide contained in the concrete from precipitating the corrosion inhibitor.
REFERENCES:
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patent: 5270661 (1993-12-01), Burnett
patent: 5275752 (1994-01-01), Hansen
Y. K. Gouda et al., "A Rapid Method of Study Corrosion Inhibition of Steel in Concrete", Journal of PCA Research & Dev't. Laboratories, Ser. 1175, pp. 24-31 (Sep. 1965).
B. Tremper, "Corrosion of Reinforcing Steel", ASTM Special Technical Pub. No. 169-A, Significance of Test & Properties of Concrete Making Materials, pp. 220-229 (publication date unknown).
John D. Mozer et al., "Corrosion of Reinforcing Bars in Concrete", Journal of the American Concrete Institute, Title No. 62-54, pp. 909-930 (Aug. 1965).
John G. Hendrickson, "Corrosion of Steel in Concrete", Portland Cement Association (Jun. 1968).
"Effect of Various Substances on Concrete and Protective Treatments, Where Required", Portland Cement Association General Information (Dec. 1968).
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J. Dillard et al., "Surface Characterization of Reinforcing Steel and the Interaction of Steel with Inhibitors in Pore Solution", Transporation Research Board, Record No. 1304, pp. 122-128 (1991) (Abstract only).
F. Tomosawa et al., "Experimental Study on the Effectiveness of Corrosion Inhibitor in Reinforced Concrete. Admixtures for Concrete: Improvement of Properties", Chapman & Hall, London, England, pp. 382-391 (1990) (Abstract only).
R. Buchholz, "Effects of Lignosulfonates in Deicing Salts on the Penetration of Chloride Ions into Concrete", Transportation Research Board Record No. 1268, pp. 186-192 (1990) (Abstract only).
M. Callahan, "Deicing Salt Corrosion with and without Inhibitors", Transportation Research Board Record No. 1211, pp. 12-17 (1989) (Abstract only).
G. Jayaprakash et al., "Electro-Osmotic Techniques for Removal of Chloride from Concrete and for Emplacement of Concrete Sealants", Kansas Dept. of Transportation, Report No. FHWA-KS-82-2 (Aug. 1982) (Abstract only).
Carpenter Robert
Warden Robert J.
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