Process for the treatment of aqueous fluids to reduce corrosion comprising dicarboxylic aliphatic acid salt and polyol
US4869841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1985 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | May 16, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/143
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a process making it possible to reduce the corrosion of metals and alloys of heat exchanger circuits where aqueous heat transfer fluids are circulating and which may contain anti-freeze products. The process consists in mixing with these aqueous heat transfer fluids on the one hand from 0.05 to 5 percent by weight of one or more salts of alkali metals or of amines of dicarboxylic aliphatic acids of the formula (CH.sub.2)n(COOH).sub.2 in which n is comprised between 2 and 10 and on the other hand from 0.05 to 2.5 percent by weight of one or more polyols comprising a number of carbon atoms between 5 and 12 and a number of alcohol functions between 5 and 12 and possessing no reducing power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.