Corrosion resistant aluminum-based alloy

Details Corrosion resistant aluminum-based alloy Corrosion resistant aluminum-based alloy

1991-02-22

1993-06-22

Wyszomierski, George

Metal treatment

Stock

Amorphous, i.e., glassy

420551, 420552, C22C 4508

Patent

active

052213757

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.

REFERENCES:
patent: 4595429 (1986-06-01), LeCaer et al.
patent: 4710246 (1987-12-01), LeCaer et al.
patent: 4891068 (1990-01-01), Masumoto et al.
patent: 5053084 (1991-10-01), Masumoto et al.
patent: 5122205 (1992-06-01), Masumoto et al.

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