Patent ID: 6686325
Filing Date: 2004-02-03
Classification: C11D,C23G

Abstract:
An alkaline sensitive metal cleaning composition comprising:(a) an alkaline concentrate comprising: (i) a source of alkalinity in an amount sufficient to provide a use solution having a pH of at least 10.0; and (ii) a first chelant component that exhibits soil removal properties when used at a pH of at least 10.0; (b) a corrosion inhibitor concentrate comprising: (i) a corrosion inhibitor component for reducing corrosion of alkaline sensitive metals when used in a use solution having a pH of at least 10.0; (ii) a second chelant component for stabilizing the corrosion inhibitor in the second concentrate when the second concentrate is provided at a pH that is less than 8.0; and (iii) a surfactant component for providing cleaning properties when used at a pH of at least 10.0; and (c) a threshold inhibitor/crystal modifier component provided in at least one of the alkaline concentrate and the corrosion inhibitor concentrate to stabilize the corrosion inhibitor in a use solution at a pH of at least 10.0.