TY - JOUR
T1 - Characterization of pack cemented Ni2Al3 coating exposed to KCl(s) induced corrosion at 600 °C
AU - Dahl, Kristian Vinter
AU - Slomian, A.
AU - Lomholt, Trine Nybo
AU - Kiamehr, Saeed
AU - Grumsen, Flemming Bjerg
AU - Montgomery, Melanie
AU - Jonsson, T.
PY - 2018
Y1 - 2018
N2 - 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% O2, 40% H2O and 55% N2 at 600 °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.
AB - 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% O2, 40% H2O and 55% N2 at 600 °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.
KW - Nickel aluminide
KW - KCI
KW - High temperature corrosion
KW - 600 °C
KW - Electron microscopy
U2 - 10.1080/09603409.2017.1392112
DO - 10.1080/09603409.2017.1392112
M3 - Journal article
SN - 0960-3409
VL - 35
SP - 267
EP - 274
JO - Materials at High Temperatures
JF - Materials at High Temperatures
IS - 1-3
ER -