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Corrosion resistant aluminum alloy substrates and methods of producing the same

  • US 8,309,237 B2
  • Filed: 08/22/2008
  • Issued: 11/13/2012
  • Est. Priority Date: 08/28/2007
  • Status: Active Grant
First Claim
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1. 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.

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