Influence of KCl and HCl on a laser clad FeCrAl alloy: In-Situ SEM and controlled environment High temperature corrosion
Journal article, 2019

This study investigated the effects of HCl and KCl on a laser-clad FeCrAl coating at 450 °C in an in-situ ESEM followed by a furnace exposure. In all in-situ TEM cross-sections, three major phases were identified: an iron rich oxide, an iron-chromium mixed oxide and an aluminium enriched layer. HCl allowed chlorine based corrosion to occur which suggests interaction from its gas phase. EDX of the regions around KCl crystals showed a decrease in chromium which is an indication of chlorine selectively removing chromium. Moreover, the mass gain in HCl with KCl was significantly lower than that observed in air with KCl.

In-situ SEM




Laser cladding

High temperature corrosion

Molten salts



L. Reddy

University of Nottingham

Mohammad Sattari

Chalmers, Physics, Microstructure Physics

C. J. Davis

Uniper Technologies

P. H. Shipway

University of Nottingham

Mats Halvarsson

Chalmers, Physics, Microstructure Physics

T. Hussain

University of Nottingham

Corrosion Science

0010-938X (ISSN)

Vol. 158 108076

Subject Categories

Materials Chemistry


Corrosion Engineering


Chalmers Materials Analysis Laboratory

Areas of Advance

Materials Science



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