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US 8,557,178 B2Granted
Corrosion inhibition of hypochlorite solutions in saturated wipes
AssigneeEcolab USA Inc.
InventorsErik C. Olson, Kim R. Smith, Steven E. Lentsch, Sherri L. Tischler
Life of this patent
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Abstract
Corrosion inhibitor compositions and methods of use are disclosed. Corrosion inhibitors are selected from polyacrylate and calcium corrosion inhibitors, zinc and calcium corrosion inhibitors and/or sugar acids and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.
Claims23
A method for cleaning, sanitizing and/or disinfecting a surface contacted by a hypochlorite source comprising:
- providing a liquid corrosion inhibitor composition in a saturated wipe, wherein the liquid corrosion inhibitor composition comprises a hypochlorite source and a corrosion inhibitor comprising a water soluble calcium salt and a member selected from the group consisting of a water soluble zinc salt, a non-thickening polymeric salt having a molecular weight less than about 10,000, and a sugar acid, and wherein the wipe is a woven or non-woven material, wherein the pH of said composition is at least about 7, the ratio of said hypochlorite source to corrosion inhibitor is from about 10:1 to about 600:1 and the ratio of said zinc salt, polymeric salt or sugar acid to said calcium salt is from about 6:1 to about 1:6;
- and
- contacting said corrosion inhibitor composition with a surface in need of cleaning, sanitizing and/or disinfecting, wherein said composition inhibits the corrosion and/or discoloration of said surface in the presence of said hypochlorite source.
A corrosion inhibitor article comprising:
- a woven or non-woven material forming a wipe saturated with a liquid corrosion inhibitor composition;
- wherein said
- liquid corrosion inhibitor composition comprises a hypochlorite source and a corrosion inhibitor comprising a water soluble calcium compound and a member selected from the group consisting of a zinc compound, a polyacrylate compound, and a sugar acid, wherein the pH of said composition is at least about 7 and wherein the composition does not cause corrosion and/or discoloration on a treated metal surface.
A corrosion inhibitor article comprising:
- a woven or non-woven material forming a wipe saturated with a corrosion inhibitor composition;
- wherein said
- corrosion inhibitor composition comprises a hypochlorite source comprising sodium hypochlorite, sodium chloride and sodium hydroxide, and about 0.01 to about 2 wt-% corrosion inhibitor comprising a water soluble calcium salt and a member selected from the group consisting of a water soluble zinc salt, a non-thickening polymeric salt having a molecular weight less than about 10,000, and a sugar acid;
- wherein the pH of said composition is at least about 7, the ratio of said hypochlorite source to corrosion inhibitor is from about 10:1 to about 600:1 and the ratio of said zinc salt, polymeric salt or sugar acid to said calcium salt is from about 6:1 to about 1:6, and wherein the composition does not cause corrosion and/or discoloration on a treated metal surface.
1 more element
A kit comprising:
- a container containing a woven or non-woven material forming a wipe saturated with a liquid corrosion inhibitor composition;
- wherein said
- corrosion inhibitor composition comprises a hypochlorite source and a corrosion inhibitor comprising a water soluble calcium compound and a member selected from the group consisting of a zinc compound, a polyacrylate compound, and a sugar acid, wherein the pH of said composition is at least about 7 and wherein the composition does not cause corrosion and/or discoloration on a treated metal surface;
- and instructions for use to combine and use the wipes with the corrosion inhibitor composition.
1 more element
Dependencies are inferred from the claim text.