Metallic substrate treatment methods and articles comprising a phosphonate functionalized layer

Abstract

Metallic substrate treatment methods and articles comprising a phosphonate functionalized layer are provided. The method comprises contacting a metallic substrate comprising at least one of aluminum and an aluminum alloy with a fluid to form a phosphonate functionalized layer on at least a region of the metallic substrate. The fluid comprises at least one of a phosphonate containing acid and a derivative thereof. At least one of the phosphonate containing acid and the derivative thereof comprises a pKa of a first acidic proton. The fluid comprises a pH at least 0.5 pH value greater than the pKa of the first acidic proton. The article comprises a metallic substrate comprising aluminum or an aluminum alloy and a phosphonate functionalized layer on at least a region of the metallic substrate.

1 .- 14 . (canceled) 
     
     
         15 . An article comprising;
 a metallic substrate comprising aluminum or an aluminum alloy; and   a phosphonate functionalized layer on at least a region of the metallic substrate.   
     
     
         16 . The article of  claim 15 , wherein the phosphonate functionalized layer comprises a phosphonate group bonded to the metallic substrate. 
     
     
         17 . The article of  claim 15 , further comprising a coating deposited over at least a region of the phosphonate functionalized layer. 
     
     
         18 . The article of  claim 17 , wherein the coating comprises at least one of a siloxane, a silazane, a fluoropolymer, an acrylic, an epoxy, a polyester, and a polyurethane. 
     
     
         19 . The article of  claim 15 , wherein the article is configured as at least one of an aerospace component, an automotive component, a transportation component, and a building and construction component. 
     
     
         20 . The article of  claim 15 , wherein the article is a vehicle wheel. 
     
     
         21 . A vehicle wheel comprising:
 a metallic substrate comprising aluminum or an aluminum alloy; and   a phosphonate functionalized layer on at least a region of the metallic substrate, wherein the phosphonate functionalized layer comprises a phosphonate group bonded to the metallic substrate.   
     
     
         22 . The vehicle wheel of  claim 21 , further comprising a coating deposited over at least a region of the phosphonate functionalized layer. 
     
     
         23 . The vehicle wheel of  claim 22 , wherein the coating comprises at least one of a siloxane, a silazane, a fluoropolymer, an acrylic, an epoxy, a polyester, and a polyurethane.