Process for depositing a silica coating on a metal surface
US4564537A · kind A · utility
10Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1985 |
| Grant date | Jan 14, 1986 |
| Priority date | — |
| Expiry date | Jan 18, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23D5/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Silica may be deposited on metal surfaces e.g. on heat exchanger surfaces to reduce undesirable deposits by the following aqueous process. Finely divided moist silicic acid of defined particle size is mixed with hot (e.g. at least 98.5.degree. C.) pure water for not more than 1 hour. The mixture is subjected to depolymerization by heating at specified pH so as to depolymerize substantially all the silica. The resulting aqueous silica is then passed over the surface to be coated at temperature above 80.degree. C. so as to deposit a hard bound silica coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.