Non-chromate corrosion inhibitor formulas based on highly crystalline hydrotalcite analogs
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United States of America Patent
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Jul 10, 2012
Grant Date -
Mar 26, 2009
app pub date -
Sep 16, 2008
filing date -
Sep 20, 2007
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Abstract
A mixture of Zinc Oxides or Hydroxides with Aluminum Hydroxides and Vanadium Oxide (V2O5) co-reacts in high temperature aqueous slurry to form highly crystalline forms of Hydrotalcite, containing the Decavanadate ion as a source of corrosion inhibition. 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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