KCl-Induced Corrosion of the FeCrAl Alloy Kanthal® AF at 600°C and the Effect of H2O
Journal article, 2015

The present study investigates the influence of H2O and KCl on the high-temperature corrosion of the FeCrAl alloy Kanthal(A (R)) AF. Polished samples, with and without applied KCl, were exposed isothermally to O-2 or O-2 + H2O at 600 A degrees C. The samples were investigated using TGA, XRD, SEM/EDX, AES and IC. It was found that KCl accelerates corrosion and that a rapidly growing iron, chromium-rich oxide forms in both environments. Chromate formation and alloy chlorination are shown to initiate the formation of non-protective oxide scales. In addition, aluminium nitrides form in the alloy substrate in both environments.

KCl

FeCrAl

Water vapour

High temperature corrosion

Author

Niklas Israelsson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Kristina M Hellström

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Lars-Gunnar Johansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 83 1-2 1-27

Subject Categories

Chemical Sciences

DOI

10.1007/s11085-014-9506-3

More information

Created

10/7/2017