Corrosion inhibiting admixture for concrete
US6340438B1 · kind B1 · utility
2Cited by
34References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Apr 19, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A corrosion inhibiting admixture for concrete is disclosed comprising a combination of organic (amines) and inorganic (nitrites) fractions that provide a synergistic effect when present at a specific ratio. Such a synergistic effect occurs when the amine:nitrite ratio (% by weight) is between 1.5 to 2.5 resulting in the admixture providing excellent corrosion inhibiting capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.