Cleaning composition comprising inorganic acids, an oxidant, and a cationic surfactant
AssigneeEcolab Inc.
InventorsKim R. Smith, Robert D. P. Hei, Michael E. Besse, Jerry D. Hoyt
Life of this patent
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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.
Claims30
A cleaning composition comprising:
- (a) a product of mixing:
- (i) acid component comprising at least one of sulfuric acid, hydrochloric acid, hydrobroznic acid, hydroiodic acid, imidophosphoric acid, thiocyanic acid, and mixtures thereof, wherein said acid component does not include nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- (iii) oxidant component, wherein the oxidant component comprises at least one of hydrogen peroxide, adducts of hydrogen peroxide, peroxycarboxylic acid, salts of peroxycarboxylic acid, pertungstic acid, permanganates, ozone, halogens, halogenoxides, manganese compounds, chromium compounds, cerium compounds, vanadium compounds, copper compounds, silver compounds, iron compounds, titanium compounds, and mixtures thereof, wherein the molar ratio of the oxidant component to the phosphoric acid is between about 2:1 and about 1:2;
- and
- (iv) penetrant comprising a cationic s t having the formula:
- wherein each of R1, R2, R3, and R4 include, individually, or in combination, substituents including 6 to 24 carbon atoms, any one to tee of R1, R2, and R4 can be hydrogen, and X is a counter ion.
A method for cleaning an aluminum surface, the method comprising the steps of:
- applying a cleaning composition to an aluminum surface, the cleaning composition comprising a product of mixing:
- (i) acid component comprising at least one of sulfuric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, imidophosphoric acid, thiocyanic acid, and mixtures thereof, wherein said acid component dots not include nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- (iii) oxidant component, wherein the oxidant component comprises at least one of hydrogen peroxide, adducts of hydrogen peroxide, peroxycarboxylic acid, salts of peroxycarboxylic acid, pertungstic acid, permanganates, ozone, halogens, halogenoxides, manganese compounds, chromium compounds, cerium compounds, vanadium compounds, copper compounds, silver compounds, iron compounds, titanium compounds, and mixtures thereof, wherein the molar ratio of the oxidant component to the phosphoric acid is between about 2:1 and about 1:2;
- (iv) penetrant comprising a cationic surfactant having the formula:
- wherein each of R1, R2, R3, and R4 include, individually, or in combination, substituents including 6 to 24 carbon atoms, any one to three of R1, R2, R3, and R4 can be hydrogen, and X is a counter ion;
- 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 comprising at least one of sulfuric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, imidophosphoric acid, thiocyanic acid, and mixtures thereof, wherein said acid component does not include nitric acid;
- (ii) source of phosphoric acid component to provide phosphoric acid;
- (iii) oxidant component, wherein the oxidant component comprises at least one of hydrogen peroxide, adducts of hydrogen peroxide, peroxycarboxylic acid, salts of peroxycarboxylic acid, pertungstic acid, permanganates, ozone, halogens, halogenoxides, manganese compounds, chromium compounds, cerium compounds, vanadium compounds, copper compounds, silver compounds, iron compounds, titanium compounds, and mixtures thereof, wherein the molar ratio of the oxidant component to the phosphoric acid is between about 2:1 and about 1:2;
- and
- (iv) penetrant comprising a cationic surfactant having the formula:
- wherein each of R1, R2, R3, and R4 include, individually, or in combination, substituents including 6 to 24 carbon atoms, any one to three of R1, R2, R3, and 4R can be hydrogen, and X is a counter ion.
Dependencies are inferred from the claim text.