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US 7,741,262 B2Granted
Compositions including hardness ions and gluconate and methods employing them to reduce corrosion and etch
AssigneeEcolab Inc.
InventorsKim R. Smith, Michel M. Lawrence, Michael J. Bartelme
Life of this patent
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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 a variety of surfaces including glass, aluminum, chrome, copper, and steel. The present invention also relates to methods employing these compositions.
Claims26
A method for cleaning an instrument comprising:
- contacting the instrument with a cleaning composition comprising:
- (a) a corrosion inhibitor composition comprising:
- i) a water soluble magnesium salt;
- ii) a water soluble calcium salt;
- and
- iii) a gluconate;
- (b) a source of alkalinity;
- and
- (c) a chelating agent;
- such that the instrument is cleaned, wherein the cleaning composition reduces corrosion of the instrument by at least about 10%, and wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is 2:1, and the weight ratio of water soluble magnesium salt to gluconate is 1:9.
7 more elements
A composition for cleaning an instrument comprising:
- (a) a corrosion inhibitor composition comprising:
- i) a water soluble magnesium salt;
- ii) a water soluble calcium salt;
- and
- iii) a gluconate;
- (b) a source of alkalinity;
- and
- (c) a chelating agent;
- wherein the composition reduces corrosion of the instrument by at least about 10%, and wherein the weight ratio of water soluble magnesium salt to water soluble calcium salt is 2:1, and the weight ratio of water soluble magnesium salt to gluconate is 1:9.
6 more elements
Dependencies are inferred from the claim text.