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US 6,582,530 B1Granted
Non-chromate protective coating for iron and iron alloys and coating solution
AssigneeUnited Technologies Corporation
InventorsThomas R. Hanlon, Mark R. Jaworowski, Michael A. Kryzman, John H. Vontell
Life of this patent
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Abstract
A non-chromate protective coating and coating solution useful for coating iron and iron alloys, particularly steel, includes V2O5, Ce2(MoO4)3 or SrWO4 as a corrosion inhibitive component
Claims11
A non-chromate protective coating solution comprising:
- from 25 to 75 wt. % H2O;
- from 5 to 20 wt. % H3PO4;
- from 2 to 10 wt. % MgO;
- from 10 to 50 wt. % Al;
- and
- from 0.5 to 10 wt. % of a metal oxide selected from the group consisting of V2O5, Ce2(MoO4)3 and SrWO4.
3 more elements
A composite comprising a metal substrate coated with a non-chromate protective coating, said non-chromate protective coating comprising:
- from 15 to 40 wt. % H3PO4;
- from 3 to 20 wt. % MgO;
- from 20 to 75 wt. % Al;
- and
- from 1.0 to 20 wt. % of a metal oxide selected from the group consisting Of V2O5, Ce2(MoO4)3 and SrWO4.
2 more elements
Dependencies are inferred from the claim text.