Abstract
The role of liquid nickel-sulfide eutectic in the mechanism of corrosive damage is determined by investigations of products of high-temperature oxidation and corrosion of superalloys with the use of scanning-electron microscopy and X-ray spectroscopic and X-ray structural analyses. It is found that the sulfide corrosion rate is controlled by the process of the dilution of the high-temperature nickel alloy within the liquid nickel-sulfide eutectic, diffusion of alloying constituents of the alloy in the liquid phase, and their subsequent oxidation.
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