Patent ID: 7709434

Claim:
A detergent for warewashing or automatic dishwashing, the detergent consisting essentially of; about 0.1 to about 70 wt % of a source of alkalinity; about 0.01 to about 20 wt-% corrosion inhibitor; the corrosion inhibitor consisting essentially of: about 2 to about 85 wt % water soluble calcium salt and about 10 to about 95 wt % water soluble magnesium salt; and about 2 to about 50 wt % gluconate; and about 0.1 to about 20 wt % of surfactant, 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, and the detergent comprises less than about 0.5 wt-% phosphorous-containing compounds.