Composition and method for inhibition of metal corrosion
US6447717B1 · kind B1 · utility
15Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1999 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jun 4, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/161
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Carbon dioxide induced corrosion of ferrous metals in aqueous systems is inhibited by treatment of the aqueous system with corrosion inhibiting amino thiol and amino disulfide compounds. Particularly effective inhibitors are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine. Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.