Corrosion resistant aluminum-based alloy
US5221375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1991 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Feb 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C45/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a corrosion resistant aluminum-based alloy which is composed of a compound having a composition consisting of the general formula: Al.sub.a M.sub.b Mo.sub.c X.sub.d Cr.sub.e wherein: M is one or more metal elements selected from the group consisting of Ni, Fe, Co, Ti, V, Mn, Cu and Ta; X is Zr or a combination of Zr and Hf; and a, b, c, d and e are, in atomic percentages; 50%.ltoreq.a.ltoreq.89%, 1%.ltoreq.b.ltoreq.25%, 2%.ltoreq.c.ltoreq.15%, 4%.ltoreq.d.ltoreq.20% and 4%.ltoreq.e.ltoreq.20%, the compound being at least 50% by volume composed of an amorphous phase. The Al-based alloy exhibits a very high corrosion resistance in severe corrosive environments, such as hydrochloric acid solution or sodium hydroxide solution, due to the formation of a highly passivative protective film. Therefore, the alloy exhibits a good durability in long services under such severe corrosive environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.