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High-temperature salt and gas corrosion of refractory alloys based on nickel

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Abstract

We present the results of investigations of chloride corrosion and oxidation of refractory ÉP539 and ÉP99 nickel-base alloys. We established that the heat-resistance of these alloys is rather high up to a temperature of 1273 K, whereas, at a temperature of 973 K, the chloride corrosion proceeds intensively and has an intercrystalline character. Under the same kinetic conditions, the rate of chloride corrosion is greater than the rate of oxidation by two to three orders of magnitude. ÉP539 alloy is more resistant against chloride corrosion than ÉP99 alloy by a factor of 1.1–1.3, but the heat-resistance of the former is less than that of the latter by the same factor.

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Authors
  1. I. V. Oryshich
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Additional information

Frantsevich Institute for Problems of Materials Technology, Ukrainian National Academy of Sciences, Kiev. Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 36, No. 1, pp. 87–92. January–February, 2000.

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Oryshich, I.V. High-temperature salt and gas corrosion of refractory alloys based on nickel. Mater Sci 36, 104–110 (2000). https://doi.org/10.1007/BF02805124

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  • DOI: https://doi.org/10.1007/BF02805124

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