Non-chromate corrosion inhibitor formulas based on highly crystalline hydrotalcite analogs
US8216352B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31529
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.