Corrosion-resistant metallic porous member and method of manufacturing the same
US5582867A · kind A · utility
5Cited by
2References
6Claims
0Family size
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Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C10/56
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In manufacturing a corrosion-resistant metallic porous member having high Cr content by diffusion process in which the material is heat-treated, a plurality of heat cycles are used to achieve uniform Cr content in the thickness direction. Metallic porous body of Ni, Fe, Ni--Cr or Fe--Cr is buried in a powder of Al, Cr and NH.sub.4 Cl. Inert gas such as Ar and H.sub.2 is introduced and the porous body is heat treated at 800.degree.-1100.degree. C. In the heat treatment, at least two temperature-increase and temperature-decrease steps are included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.