Conversion coating treatment

Abstract

A kit for applying a coating includes a first handheld container with a first liquid trivalent chromium salt composition disposed therein. A first applicator is disposed in fluid communication with the first container and is configured to dispense the first composition. The kit also includes a second handheld container having a second liquid oxidizing agent composition disposed therein. A second applicator is disposed in fluid communication with the second container and is configured to dispense the second composition.

1 . A kit for applying a conversion coating, comprising:
 a first handheld container comprising a first liquid composition disposed therein that comprises a trivalent chromium salt;   a first applicator in fluid communication with the first container configured to dispense the first composition;   a second handheld container comprising a second liquid composition disposed therein comprising an oxidizing agent; and   a second applicator in fluid communication with the second container configured to dispense the second composition.   
     
     
         2 . The kit of  claim 1 , comprising a housing that comprises a first chamber as said first container and a second chamber as said second container. 
     
     
         3 . The kit of  claim 1 , comprising a first housing that comprises a first chamber as said first container, and a second housing, separate from the first housing, that comprises a second chamber as the second container. 
     
     
         4 . The kit of  claim 1 , wherein the applicators are each independently selected from porous pads, brushes, rollers, or nozzles. 
     
     
         5 . The kit of  claim 1 , wherein the applicator in fluid communication with the second container is configured to make contact with a substrate to apply the second composition to the substrate, and wherein the second container and the applicator in fluid communication with it are configured to prevent fluid communication from the applicator to the second container. 
     
     
         6 . The kit of  claim 1 , comprising an oblong handheld housing that comprises a first chamber as said first container and a second chamber as said second container, a first applicator comprising a porous pad disposed at a first end of the oblong housing in fluid communication with the first chamber, and a second applicator comprising a porous pad disposed at a second end of the oblong housing in fluid communication with the second chamber. 
     
     
         7 . The kit of  claim 1 , comprising a first oblong handheld housing that comprises a first chamber as said first container and a first applicator comprising a porous pad disposed at an end of the first oblong housing in fluid communication with the first chamber, and a second oblong housing that comprises a second chamber as said second container and a second applicator disposed at an end of the second oblong housing comprising a porous pad in fluid communication with the second chamber. 
     
     
         8 . The kit of  claim 1 , wherein the oxidizing agent is selected from a peroxide, a permanganate salt, or combinations comprising the foregoing. 
     
     
         9 . The kit of  claim 8 , wherein the oxidizing agent comprises hydrogen peroxide. 
     
     
         10 . The kit of  claim 9 , wherein the second composition comprises 0.1 wt. % to 10 wt. % hydrogen peroxide, based on the total weight of the second composition. 
     
     
         11 . The kit of  claim 1 , wherein the second liquid composition is configured to stay wet on a substrate for at least 0.5 minutes. 
     
     
         12 . The kit of  claim 1 , further comprising instructions to apply a plurality of passes of the second composition to a substrate at intervals configured to maintain a wet layer of the second composition on the substrate for at least 0.5 minutes. 
     
     
         13 . The kit of  claim 1 , further comprising instructions to allow a drying period of time after application of the first composition to a substrate before applying the second composition. 
     
     
         14 . A method of using the kit of  claim 1 , comprising applying a coating of the first composition to a substrate, allowing a drying period of time to pass, applying the second composition to the coated substrate, and maintaining a wet layer of the second composition on the coated substrate for at least 0.5 minutes. 
     
     
         15 . The method of  claim 14 , comprising applying a plurality of passes of the second composition to the coated substrate at intervals configured to maintain a wet layer of the second composition on the substrate for at least 0.5 minutes. 
     
     
         16 . The method of  claim 14 , wherein the substrate comprises aluminum, zinc, cadmium, tin, magnesium, iron, copper, silver, and alloys thereof. 
     
     
         17 . A method of protecting a trivalent chromium conversion-coated substrate from corrosion, comprising contacting the substrate with a porous pad disposed on and end of an oblong handheld housing in fluid communication with a chamber disposed within the housing, and dispensing a liquid composition comprising an oxidizing agent disposed in the chamber onto the substrate through the porous pad. 
     
     
         18 . The method of  claim 17 , comprising applying a plurality of passes of the second composition to the coated substrate at intervals configured to maintain a wet layer of the second composition on the substrate for at least 0.5 minutes. 
     
     
         19 . The method of  claim 17 , comprising applying a plurality of passes of the second composition to the coated substrate at intervals configured to maintain a wet layer of the second composition on the substrate for at least three minutes. 
     
     
         20 . The method of  claim 17 , comprising applying a plurality of passes of the second composition to the coated substrate at intervals configured to maintain a wet layer of the second composition on the substrate for at least five minutes.