Corrosion inhibitors of steels and aqueous compositions of alkali meal halide containing them
US4963290A · kind A · utility
18Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Feb 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/188
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to corrosion inhibitors of steels, particularly carbon steels or low-alloy steels. They are ternary mixtures with synergetic action containing at least one strong base, at least one molybdate and at least one phosphate. This invention also relates to aqueous compositions of alkali metal halide containing said inhibitors. Such compositions are advantageously used as working fluid in high temperature absorption heat pump systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.