Method for preventing obstruction in aluminum brass pipes in a water flow path
US6106770A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/04
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for preventing obstruction in aluminum brass pipes in a water flow path, including the steps of continuously supplying iron ions or an iron ion supply compound to water in the water flow path in such a manner that a concentration of iron ions in the water is 0.005 to 0.05 mg/liter, and supplying hydrogen peroxide or a hydrogen peroxide supply compound for a period of time sufficient for preventing adhesion of organisms to the aluminum brass pipes but not impeditive to formation of corrosion-resistant coating inside the pipes, in such a manner that a concentration of hydrogen peroxide in the water is 0.1 to 1.5 mg/liter, whereby corrosion of aluminum brass pipes and adhesion of organisms to the pipes are prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.