Corrosion-inhibited antifreeze/coolant composition
US5085793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A corrosion-inhibited antifreeze composition is disclosed. Specifically, the antifreeze composition comprises a major portion of a liquid alcohol freezing point depressant and a minor portion of at least one hydroxyl-substituted aromatic carboxylic acid having the hydroxyl radical disposed proximate to the carboxylic radical. The above described acid is employed as a corrosion inhibitor. Other conventional corrosion inhibitors may be employed in conjunction with the acids. In another embodiment, the present invention relates to a process for inhibitig the corrosion of metals present in the cooling system of an internal combustion engine which comprises intimately contacting the metal surface to be inhibited against corrosion with the antifreeze composition described above. Most preferably, the target substrate is high lead solder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.