Corrosion inhibiting pigment
US4837253A · kind A · utility
11Cited by
19References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Dec 15, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Corrosion inhibiting calcium-containing amorphous precipitated silica is described. The silica is prepared by admixing simultaneously in a reactor aqueous alkali metal silicate, e.g., sodium silicate, acidifying agent, e.g., hydrochloric acid, and a water-soluble source of calcium, e.g., calcium chloride. The product contains from 6 to 9 weight percent calcium (as CaO). The silica product may be incorporated into a coating composition used for corrodible metallic surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.