TY - JOUR
T1 - Artificial MNS inclusions in stainless steel
T2 - Fabrication by spark plasma sintering and corrosion evaluation by microelectrochemical measurements
AU - Nishimoto, Masashi
AU - Muto, Izumi
AU - Sugawara, Yu
AU - Hara, Nobuyoshi
N1 - Funding Information:
This work was supported by JSPS KAKENHI (grant Nos. JP17H01331 and JP17J03625). This work was also supported by the Program for Leading Graduate Schools, “Interdepartmental Doctoral Degree Program for Multidimensional Materials Science Leaders, Tohoku University,” MEXT, Japan.
Funding Information:
This work was supported by JSPS KAKENHI (grant Nos. JP17H01331 and JP17J03625). This work was also supported by the Program for Leading Graduate Schools, ?Interdepartmental Doctoral Degree Program for Multidimensional Materials Science Leaders, Tohoku University,? MEXT, Japan.
Publisher Copyright:
© 2020 ISIJ
PY - 2020
Y1 - 2020
N2 - Spark plasma sintering was used to fabricate type 304L stainless steel specimens containing artificial manganese sulfide (MnS) inclusions, and a microelectrochemical technique was used to characterize the pit initiation behavior at the MnS. A 200 μm square electrode area that included an artificial MnS particle was potentio-dynamically polarized in 0.1 M NaCl, and the electrode surface was observed in situ by optical microscopy. The anodic dissolution of the MnS particle was observed in the passive region of the stainless steel. The pit occurred at the boundary between the particle and the steel matrix after the particle dissolved slightly. The dissolution potential and pit initiation behavior at the artificial MnS particles in the sintered stainless steel were confirmed to be similar to those at MnS inclusions in commercial stainless steels.
AB - Spark plasma sintering was used to fabricate type 304L stainless steel specimens containing artificial manganese sulfide (MnS) inclusions, and a microelectrochemical technique was used to characterize the pit initiation behavior at the MnS. A 200 μm square electrode area that included an artificial MnS particle was potentio-dynamically polarized in 0.1 M NaCl, and the electrode surface was observed in situ by optical microscopy. The anodic dissolution of the MnS particle was observed in the passive region of the stainless steel. The pit occurred at the boundary between the particle and the steel matrix after the particle dissolved slightly. The dissolution potential and pit initiation behavior at the artificial MnS particles in the sintered stainless steel were confirmed to be similar to those at MnS inclusions in commercial stainless steels.
KW - Microelectrochemical measurement
KW - Pitting corrosion
KW - Spark plasma sintering
KW - Stainless steel
KW - Sulfide inclusion
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U2 - 10.2355/isijinternational.ISIJINT-2019-408
DO - 10.2355/isijinternational.ISIJINT-2019-408
M3 - Article
AN - SCOPUS:85078531660
VL - 60
SP - 196
EP - 198
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 1
ER -