High aluminum zeolite coatings on corrodible metal surfaces
US7179547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Jul 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24997
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition of matter including a substrate of a metal that is susceptible to corrosion in a high pH alkaline solution, a corrosion-resistant base layer disposed on the surface of the substrate, the base layer having a pure or high silica zeolite having a silicon:aluminum atomic ratio of at least about 100, a middle mixed zeolite layer disposed on the surface of the base layer, and a top hydrophilic layer disposed on the surface of the middle layer, the top layer having a high aluminum zeolite having a silicon:aluminum atomic ratio of less than 5. The middle mixed zeolite layer includes a zeolite having a silicon:aluminum atomic ratio range that is between the silicon:aluminum ratio of the pure or high silica zeolite of the base layer and of the high aluminum zeolite of the top layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.