KCl-Induced Corrosion of an FeCrAl Alloy at 600°C in O2 + H2O Environment: The Effect of Pre-oxidation
Journal article, 2015

The present study investigates the influence of H2O and KCl on the high temperature corrosion of an FeCrAl alloy at 600 A degrees C. Polished samples were exposed to O-2 or O-2 + H2O and to O-2 + H2O with KCl applied. The samples were investigated using SEM/EDX, XRD, IC, AES and SIMS. It was found that KCl accelerates corrosion and that a rapidly growing iron-rich oxide forms with time. Chromate formation is shown to initiate the formation of a non-protective oxide scale. Pre-oxidising the alloy before exposure in the presence of KCl had a strongly beneficial effect on the corrosion.

FeCrAl

Water vapour

KCl

High temperature corrosion

Pre-oxidation

Author

Niklas Israelsson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Josefin Engkvist

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Kristina M Hellström

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Mats Halvarsson

Chalmers, Applied Physics, Materials Microstructure

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Lars-Gunnar Johansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Oxidation of Metals

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

Vol. 83 1-2 29-53

Subject Categories

Chemical Sciences

DOI

10.1007/s11085-014-9507-2

More information

Latest update

11/5/2018