COMPOSITIONS INCLUDING HARDNESS IONS AND GLUCONATE AND METHODS EMPLOYING THEM TO REDUCE CORROSION AND ETCH
First Claim
Patent Images
1. A corrosion inhibiting composition comprising:
- about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and
about 1 to about 60 wt-% gluconate;
wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13.
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Abstract
The present invention relates to compositions including a water soluble magnesium salt, water soluble calcium salt, and gluconate, which have a beneficial effect on corrosion during cleaning. The present compositions can reduce corrosion of glass, aluminum, or steel. The present invention also relates to methods employing these compositions.
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Citations
45 Claims
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1. A corrosion inhibiting composition comprising:
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about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A detergent for warewashing or automatic dishwashing, the detergent comprising source of alkalinity and about 0.01 to about 20 wt-% corrosion inhibitor;
- the corrosion inhibitor comprising;
about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 43, 44, 45)
- the corrosion inhibitor comprising;
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23. A hard surface cleaner comprising surfactant and about 0.01 to about 20 wt-% corrosion inhibitor;
- the corrosion inhibitor comprising;
about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 41, 42)
- the corrosion inhibitor comprising;
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37. A method of inhibiting corrosion during cleaning, the method comprising:
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providing a corrosion inhibitor comprising; about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13;preparing an aqueous use composition of the corrosion inhibitor; and contacting an object in need of cleaning with the aqueous use composition.
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38. A method of washing ware, the method comprising:
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providing a detergent for warewashing or automatic dishwashing, the detergent comprising source of alkalinity and about 0.01 to about 20 wt-% corrosion inhibitor;
the corrosion inhibitor comprising;about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13;preparing an aqueous use composition of the detergent for warewashing or automatic dishwashing; and contacting the ware with the aqueous use composition.
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39. A method of cleaning a hard surface, the method comprising:
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providing a hard surface cleaner comprising surfactant and about 0.01 to about 20 wt-% corrosion inhibitor;
the corrosion inhibitor comprising;about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13;preparing an aqueous use composition of the hard surface cleaner; and contacting the hard surface with the aqueous use composition.
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40. A method of corrosion control in a food or beverage processing facility, the method comprising:
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providing an alkaline cleaner or a corrosion control composition comprising about 0.01 to about 100 wt-% corrosion inhibitor;
the corrosion inhibitor comprising;about 1 to about 98 wt-% water soluble calcium salt and water soluble magnesium salt; and about 1 to about 60 wt-% gluconate; wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is about 1-2;
1-2;
the weight ratio of water soluble magnesium salt to gluconate is greater than 1;
1; and
the weight ratio of water soluble calcium salt to gluconate is about 1-19;
1;
13;preparing an aqueous use composition of the alkaline cleaner; introducing the aqueous use composition into the process facilities at a temperature in the range of about 4°
C. to 60°
C.;holding the aqueous use composition in a container or circulating the aqueous use composition throughout the system for a time sufficient to clean; and draining the aqueous use composition from the container or system.
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Specification