Water-soluble containers for water cooling towers and boilers
US6085905A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of protecting water reservoirs or enclosures utilized in thermal energy conversion applications against corrosion during periods of shutdown by depositing a source of a vapor phase corrosion inhibitor, preferably a blend of ammonium benzoate, sodium benzoate, sodium sebacate, monoethanolammonium benzoate, benzotriazole, and cyclohexylammonium benzoate within the enclosure through the steps of packaging a vapor phase corrosion inhibitor in powder form within a container fabricated from a water-soluble film; perforating the walls of the container; depositing the perforated container within the enclosure being protected; and introducing water into the enclosure at the end of the shutdown period for simultaneously flushing the enclosure and removal of both the residual corrosion inhibitor and water-soluble container therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.