Alkaline sensitive metal cleaning composition, method for cleaning an alkaline sensitive metal surface, and washing facility

A method for cleaning an alkaline sensitive metal surface, the method comprising steps of:

• (a) diluting and mixing an alkaline concentrate and a corrosion inhibitor concentrate with water to provide a use solution, wherein:
• (i) the alkaline concentrate comprising:
• (A) a source of alkalinity in an amount sufficient to provide a use solution having a pH of at least 10.0;
• and
• (B) a first chelant component that exhibits soil removal properties when used at a pH of at least 10.0;
• (ii) the corrosion inhibitor concentrate comprising:
• (A) 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;
• (B) a second chelant component for stabilizing the corrosion inhibitor in the corrosion inhibitor concentrate when the corrosion inhibitor concentrate is provided at a pH that is less than 8.0;
• and
• (C) a surfactant component for providing cleaning properties when used at a pH of at least 10.0;
• and
• (iii) a threshold inhibitor/crystal modifier component provided in at least on 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;
• and
• (b) applying the use solution to an alkaline sensitive metal.

A washing facility comprising:

• (a) a first component tank comprising 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 second component tank comprising 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 corrosion inhibitor concentrate when the corrosion inhibitor concentrate is provided at a pH that is less than 8.0;
• and
• (iii) a surfactant component for cleaning properties when used at a pH of at least 10.0;
• (c) a mixing vessel for forming a use solution from water, the alkaline concentrate, and the corrosion inhibitor concentrate;
• (d) a water feed for conveying water to the mixing vessel;
• and
• (e) a use solution line for conveying the use solution from the mixing vessel to a use solution applicator.