Corrosion inhibition in chelant solutions

Details Corrosion inhibition in chelant solutions Corrosion inhibition in chelant solutions

C - Chemistry, Metallurgy

23

F

C23F 11/167 (2006.01) C02F 5/08 (2006.01) C23G 1/24 (2006.01)

Patent

CA 2060775

ABSTRACT OF THE INVENTION The present invention is directed to a method of inhibiting corrosion in aqueous systems which employ amino acid chelants in concentrations which are corrosive to the metal surfaces in contact with the aqueous system. The method comprises adding to the system a corrosion inhibiting amount of 1-hydroxyethane-1,1-diphosphonic acid (HEDPA). The corrosion inhibiting amount is generally in the range of from 0.5% to 10% on the basis of the concentraton of amino acid chelant in the system.

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