Corrosion inhibition of sodium and calcium chloride
US4849171A · kind A · utility
Inventor
Key dates
| Filing date | Feb 9, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Feb 9, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/185
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A corrosion inhibited sodium and calcium chloride composition preferably in granular form, which is uniformly coated with a minute to minor quantity of an inhibitor comprising chiefly superphosphate and a minor amount of magnesium oxide. There is also disclosed a method for inhibiting corrosion of sodium and calcium chloride which comprises supplying to the metal surface which is exposed to corrosive attack by sodium and calcium chloride, a minute quantity of an inhibitor comprising chiefly superphosphate and a minor amount of magnesium oxide. The magnesium oxide functions to cement the inhibitor as a tenacious coating on the salt granules, and also to enhance the effectiveness of the phosphate corrosion inhibition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.