Corrosion resistant aluminum-based alloy

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

C - Chemistry, Metallurgy

22

C

75/1.1

C22C 45/08 (2006.01) C22C 21/00 (2006.01)

Patent

CA 2037996

Disclosed is a corrosion resistant aluminum- based alloy which is composed of a compound having a composition consisting of the general formula: AlaMbMocXdCre 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% ? a ? 89%, 1% ? b ? 25%, 2% ? c ? 15%, 4% ? d ? 20% and 4% ? e ? 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 passive protective film. Therefore, the alloy exhibits a good durability in long services under such severe corrosive environments.

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