Corrosion inhibiting powders and processes employing powders
US7892601B1 · kind B1 · utility
1Cited by
23References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2006 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 23, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A corrosion inhibiting agent is provided as a finely ground powder that is dispensed into a sheath or other casing enclosing a metal bar, cable, or other tension member. The agents are produced by preparing salts of amines with benzoic acid or nitric acid, drying the salts, and grinding and screening the salts to provide a desired maximum particle size. Also disclosed is a dry fogging process through which the powder is applied to metal tension members enclosed in polymeric sheaths or other fluid tight casings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.