Patent ID: 8691018

Claim:
A detergent composition comprising: (a) a metal silicate in an amount effective to provide a use composition having a pH of at least about 8 and obtained by diluting the detergent composition with water, wherein said effective amount of metal silicate is between 30 wt. % and 55 wt. %; and (b) a corrosion inhibitor component in an amount sufficient for reducing corrosion of aluminum or aluminum containing alloys, the corrosion inhibitor component consisting of one or more polyacrylic acid homopolymers having a molecular weight of at least about 5,000 daltons, wherein said sufficient amount of corrosion inhibitor is between 5 wt. % and 30 wt. %; wherein said composition contains less than about 0.1% by weight of phosphorous; wherein said composition does not include 1-hydroxy ethylidene 1-1-diphosphonic acid; and wherein said composition does not include sodium carbonate.