TY - JOUR
T1 - High temperature oxidation of Co-W electroplated type 430 stainless steel for the interconnect of solid oxide fuel cells
AU - Gan, Lu
AU - Murakami, Hideyuki
AU - Saeki, Isao
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP25420768 .
PY - 2018/4/15
Y1 - 2018/4/15
N2 - Cobalt–tungsten alloy layer containing 2.4 at% W was electroplated on type 430 stainless steel (Fe–16 mass% Cr), and it was subjected to high-temperature oxidation at 800 °C in Air–3 vol% H2O atmosphere for 1000 h. A five-layered oxide of Co3O4, FeCo2O4, CoWO4, (Co,Fe,Cr)3O4, and Cr2O3 formed within 1 h, and the structure retained up to 1000 h. The outward diffusion of Cr3+ was effectively prevented by the CoWO4 layer. In the oxide, Co and W exist as divalent and hexavalent ions respectively, and there is no trivalent cation sites or trivalent cation vacancy through which Cr3+ diffuses.
AB - Cobalt–tungsten alloy layer containing 2.4 at% W was electroplated on type 430 stainless steel (Fe–16 mass% Cr), and it was subjected to high-temperature oxidation at 800 °C in Air–3 vol% H2O atmosphere for 1000 h. A five-layered oxide of Co3O4, FeCo2O4, CoWO4, (Co,Fe,Cr)3O4, and Cr2O3 formed within 1 h, and the structure retained up to 1000 h. The outward diffusion of Cr3+ was effectively prevented by the CoWO4 layer. In the oxide, Co and W exist as divalent and hexavalent ions respectively, and there is no trivalent cation sites or trivalent cation vacancy through which Cr3+ diffuses.
KW - A. Stainless steel
KW - B. SEM, XRD
KW - C. High temperature corrosion
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U2 - 10.1016/j.corsci.2018.02.026
DO - 10.1016/j.corsci.2018.02.026
M3 - Article
AN - SCOPUS:85042443209
VL - 134
SP - 162
EP - 168
JO - Corrosion Science
JF - Corrosion Science
SN - 0010-938X
ER -