System for the passivation of metal surfaces affected by operating conditions and agents promoting corrosion
US5306355A · kind A · utility
25Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Mar 4, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A system for the passivation of metal surfaces, and more especially those of stainless steel, titanium, etc., in equipment used for chemical processes, where elements and compounds are formed which have a corrosive action, in particular where temperature and pressure are higher than ambient conditions. In the system the main passivating agent is oxygen (air) combined with at least a second auxiliary agent, characterized by the fact that the latter is ozone (03).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.