Characterization of pack cemented Ni(2)Al(3 )coating exposed to KCl(s) induced corrosion at 600 degrees C
Artikel i vetenskaplig tidskrift, 2018
Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm(-2) KCl(s) deposit in an environment containing 5% O-2, 40% H2O and 55% N-2 at 600 degrees C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50-250 nm thick nodules form that are enriched in K, O and Al.
KCl
Nickel aluminide
high temperature corrosion
electron microscopy
600 degrees C
Författare
K. V. Dahl
Danmarks Tekniske Universitet (DTU)
Andreas Slomian
Chalmers, Kemi och kemiteknik, Energi och material
T. N. Lomholt
Danmarks Tekniske Universitet (DTU)
FORCE Technology
S. Kiamehr
Danmarks Tekniske Universitet (DTU)
F. B. Grumsen
Danmarks Tekniske Universitet (DTU)
M. Montgomery
Danmarks Tekniske Universitet (DTU)
Torbjörn Jonsson
Chalmers, Kemi och kemiteknik, Energi och material
Materials at High Temperatures
0960-3409 (ISSN)
Vol. 35 1-3 267-274Ämneskategorier
Bearbetnings-, yt- och fogningsteknik
Materialkemi
Korrosionsteknik
DOI
10.1080/09603409.2017.1392112