Influence of KCl and HCl on a laser clad FeCrAl alloy: In-Situ SEM and controlled environment High temperature corrosion
Artikel i vetenskaplig tidskrift, 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.
HCl
In-situ SEM
Molten salts
Laser cladding
FeCrAl
High temperature corrosion
Aluminium
KCl
Författare
L. Reddy
University of Nottingham
Mohammad Sattari
Chalmers, Fysik, Mikrostrukturfysik
C. J. Davis
Uniper Technologies
P. H. Shipway
University of Nottingham
Mats Halvarsson
Chalmers, Fysik, Mikrostrukturfysik
T. Hussain
University of Nottingham
Corrosion Science
0010-938X (ISSN)
Vol. 158 108076Ämneskategorier
Materialkemi
Geokemi
Korrosionsteknik
DOI
10.1016/j.corsci.2019.07.003