Corrosion inhibited antifreeze compositions and process for inhibiting the corrosion of solder alloys
US3931029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/124
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A novel antifreeze composition is provided which comprises a water soluble liquid alcohol freezing point depressant and an inhibitor. The freezing point depressant is preferably at least one water soluble alcohol containing from one to four carbon atoms inclusive and from one to four hydroxy groups inclusive such as ethylene glycol. The inhibitor comprises at least one substance selected from the group consisting of PA1 A. compounds corresponding to the following structural formula: ##SPC1## Wherein R.sub.1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R.sub.2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R.sub.3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and PA1 B. the mono- and di-metal salts, the mono- and di-ammonium salts, and the mono- and di-amides of compounds corresponding to the above structural formula. The presently preferred inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene, or the mono- and di-metal salts, ammonium salts, and amides thereof. The inhibitor also aids in solublizing antifoam agents. The invention further provides a process for inhibiting the corros…
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