Rapidly solidified aluminum alloys are candidate materials for applications in marine and aerospace industries. Al—Ti-based alloys are particularly attractive because of their high strength to weight ratio. In recent years corrosion studies on various rapidly solidified powder metallurgy aluminum alloys have been reported.2-9  The various aluminum alloys studied have included 2618 and 2024 alloys 7090 alloys, Al—Fe,3,7  Al—Li,4-6  Al—Mg,4,7  Al—Cu,4,7  Al—Er, Al—Fe—Mo, Al—Zn—Mg, and Al—Zn—Mg—Cu. One study in particular investigated a number of binary and ternary aluminum alloys containing Mg, Ti, Mn, Cr, Fe, Ni, C, Zn, Zr, Nb, and/or Si. However, binary Al—Ti was not considered and the only Ti-containing alloy studied was Al—6%Ti—5%Si.

The purpose of this investigation is to determine the general corrosion and localized corrosion behavior of rapidly solidified Al—Ti-based alloys and compare it to that of Al—8%Fe—2%Mo.

The alloys studied were...

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