Cleaning composition and methods for manufacturing and using
AssigneeEcolab Inc.
InventorsKim R. Smith, Robert D.P. Hei, Michael E. Besse, Jerry D. Hoyt
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Abstract
A cleaning composition is provided according to the invention. The cleaning composition includes a product of mixing an acid component, a source of phosphoric acid component, and an oxidant component. The molar ratio of oxidant component to phosphoric acid component is preferably between about 2:1 and about 1:2, and the molar ratio of oxidant component to acid component is preferably between about 1:3 and about 1:5. A method of cleaning an aluminum surface is provided The method includes a step of applying the cleaning composition to an aluminum surface, and rinsing the cleaning composition from the aluminum surface.
Claims35
A cleaning composition comprising:
- (a) a product of mixing:
- (i) acid component having a first pka of about 2.5 or less and being less oxidizing than nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- and
- (iii) oxidant component.
A method for cleaning an aluminum surface, the method comprising steps of:
- applying a cleaning composition to an aluminum surface, the cleaning composition comprising:
- (a) a product of mixing:
- (i) acid component having a pka of about 2.5 or less and being less oxidizing than nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- and
- (iii) oxidant component;
- and
- rinsing the cleaning composition from the aluminum surface.
A method for manufacturing a cleaning composition for cleaning an aluminum surface, the method comprising:
- mixing:
- (i) acid component having a first pka of about 2.5 or less and being less oxidizing than nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- and
- (iii) oxidant component.
Dependencies are inferred from the claim text.