Corrosion inhibition of hypochlorite solutions
First Claim
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1. A corrosion inhibitor composition comprising:
- a hypochlorite source, which is free of carbonate and bicarbonate anions;
a corrosion inhibitor comprising a water soluble zinc compound and a water soluble calcium compound;
wherein said corrosion inhibitor does not contain bromide, iodide, aluminum or magnesium;
wherein the ratio of said hypochlorite source to corrosion inhibitor is from about 10;
1 to about 600;
1; and
wherein the pH of said composition is at least about 7.
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Abstract
Corrosion inhibitor compositions and methods of use are disclosed. Zinc and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.
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Citations
11 Claims
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1. A corrosion inhibitor composition comprising:
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a hypochlorite source, which is free of carbonate and bicarbonate anions; a corrosion inhibitor comprising a water soluble zinc compound and a water soluble calcium compound; wherein said corrosion inhibitor does not contain bromide, iodide, aluminum or magnesium; wherein the ratio of said hypochlorite source to corrosion inhibitor is from about 10;
1 to about 600;
1; andwherein the pH of said composition is at least about 7. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A corrosion inhibitor composition comprising:
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a hypochlorite source comprising sodium hypochlorite, sodium chloride and sodium hydroxide, wherein said hypochlorite source is free of carbonate and bicarbonate anions; and about 0.01 to about 2 wt-% corrosion inhibitor comprising a water soluble zinc salt and a water soluble calcium salt, wherein said corrosion inhibitor does not contain bromide, iodide, aluminum or magnesium, the pH of said composition is at least about 7, the ratio of said hypochlorite source to corrosion inhibitor is from about 50;
1 to about 200;
1 and the ratio of said zinc salt to said calcium salt is from about 6;
1 to about 1;
6. - View Dependent Claims (9, 10, 11)
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Specification