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High Temperature Alloy Corrosion by Halogens


Difficulties of alloy selection for high-temperature halogen service are described with reference to product morphologies, vaporization and the manner by which alloy degradation may occur. Selected results from work with alloy 600 (Ni-16 Cr-8Fe) and Havnes® Alloy 230 (Ni-22 Cr-14W-2Mo-0.3Al-0.02 La) are used to contrast various modes of attack. Oxidizing chlorine-containing gases often give rise to heavy volatilization and intergranular attack at 900°C (1650°F) whilst HF/steam mixtures result in more uniform internal oxidation at 750°C (1380°F).

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Additional information

Peter Elliott is currently a Lecturer in corrosion science and engineering at the Corrosion and Protection Centre, UMIST, in Manchester, England

R. Prescott and C.J. Tyreman are each researching for their Ph.D. degrees at the Corrosion and Protection Centre, UMIST, Manchester, England

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Elliott, P., Tyreman, C.J. & Prescott, R. High Temperature Alloy Corrosion by Halogens. JOM 37, 20–23 (1985).

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  • Intergranular Attack
  • CrF3
  • NiF2
  • Cabot Corporation
  • British Nuclear Fuel