Non-chromate corrosion inhibitor formulas based on zirconium vanadium oxide compositions
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United States of America Patent
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Mar 20, 2012
Grant Date -
Apr 9, 2009
app pub date -
Mar 25, 2008
filing date -
Mar 27, 2007
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Abstract
A mixture of zirconium hydroxides or zirconium basic carbonate with vanadium oxide (V205) co-reacts in high temperature aqueous slurry to form respectively an amorphous material, believed to be based on a zirconium analog of a zeolite structure, and a solid solution of zirconium oxide with vanadium oxide. The subject compositions, free of hexavalent chromium, are highly effective in providing blister-free corrosion prevention in typical coil and aerospace grade epoxy primer and color coat combinations.
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