Patent ID: 8309237

Claim:
A wrought aluminum alloy product comprising: (a) an aluminum alloy base; (b) a porous sulfate-phosphate oxide zone integral with the base, the porous sulfate-phosphate oxide zone having: (i) a plurality of pores, (ii) sulfur atoms, (iii) phosphorous atoms, (iv) wherein the porous sulfate-phosphate oxide zone has a ratio of the sulfur atoms (S) to the phosphorous atoms (P) of from about 5:1 (S:P) to about 100:1 (S:P), and (v) wherein the porous sulfate-phosphate oxide zone has an average thickness of at least about 8 microns; and (c) a silicon-containing polymer zone at least partially overlapping the porous sulfate-phosphate oxide zone, (i) wherein the silicon-containing polymer zone comprises silicon-containing polymer; and (ii) wherein the pores of the porous sulfate-phosphate oxide zone contain at least some of the silicon-containing polymer.