The hot corrosion behavior of wrought Ni- and Co-base superalloys and nickel aluminide intermetallics was studied in a burner rig at 900°C (1650°F) injected with 5 and 50 ppm sea salt. Nickel aluminides (IC-50 and IC-218) were found to be extremely susceptible to hot corrosion attack. Some state-of-the-art wrought superalloys, such as HAYNES alloys 230 and 188, on the other hand, were extremely resistant to hot corrosion. The behavior of different alloy systems, breakaway corrosion and corrosion morphology are discussed.

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