TY - JOUR
T1 - Influence of Time on Low Temperature Salt Bath Nitriding and its Corrosion Behavior of 316L ASS in PEMFC Environment
AU - Vipin Tandon, Tandon
AU - Patil, Awanikumar P.
AU - Rathod, Ramesh C.
N1 - Publisher Copyright:
© 2020, Pleiades Publishing, Ltd.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Abstract: Austenitic stainless steels (ASSs) offer many advantages over carbon and/or graphite composites for bipolar plates of proton exchange membrane fuel cells (PEMFCs). However, its corrosion resistance in PEMFCs operating conditions is lower. A low temperature (450°C) salt bath nitriding technique for different durations (3, 6 and 12 h) was employed to modify the surface of 316L ASS to enhance its corrosion resistance. The scanning electron microscopy of the transverse sections of nitrided sample reveals a white layer and its thickness increases on increasing nitriding durations. The X-ray photon spectroscopy results show that on nitriding, nitrogen (N) is present in the free form (on 3 h duration) and nitrides (CrN and FexN) precipitates (on 6 and 12 h durations). The corrosion resistance increased on nitridation. The best corrosion resistance was obtained for 3 h nitriding. The corrosion resistance decreases on increasing durations which can be attributed to the formation of nitrides.
AB - Abstract: Austenitic stainless steels (ASSs) offer many advantages over carbon and/or graphite composites for bipolar plates of proton exchange membrane fuel cells (PEMFCs). However, its corrosion resistance in PEMFCs operating conditions is lower. A low temperature (450°C) salt bath nitriding technique for different durations (3, 6 and 12 h) was employed to modify the surface of 316L ASS to enhance its corrosion resistance. The scanning electron microscopy of the transverse sections of nitrided sample reveals a white layer and its thickness increases on increasing nitriding durations. The X-ray photon spectroscopy results show that on nitriding, nitrogen (N) is present in the free form (on 3 h duration) and nitrides (CrN and FexN) precipitates (on 6 and 12 h durations). The corrosion resistance increased on nitridation. The best corrosion resistance was obtained for 3 h nitriding. The corrosion resistance decreases on increasing durations which can be attributed to the formation of nitrides.
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U2 - 10.1134/S2070205120040243
DO - 10.1134/S2070205120040243
M3 - Article
AN - SCOPUS:85091406819
SN - 2070-2051
VL - 56
SP - 772
EP - 779
JO - Protection of Metals and Physical Chemistry of Surfaces
JF - Protection of Metals and Physical Chemistry of Surfaces
IS - 4
ER -