TY - JOUR
T1 - Effect of atmospheric-controlled induction-heating fine particle peening on electrochemical characteristics of austenitic stainless steel
AU - Kikuchi, Shoichi
AU - Iwamae, Shota
AU - Akebono, Hiroyuki
AU - Komotori, Jun
AU - Kadota, Keisuke
N1 - Funding Information:
This work has been supported by the Grant-in-Aid for Scientific Research (B) No· 15H03894 of JSPS KAKENHI Grant from 2015, The Light Metal Educational Foundation, Inc. and Neturen Co., Ltd . We are grateful for their support.
Publisher Copyright:
© 2017
PY - 2018/1/25
Y1 - 2018/1/25
N2 - Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) using Cr and Mo shot particles in a N2 atmosphere was introduced to improve the electrochemical characteristics of AISI 316 austenitic stainless steel. The surface microstructure of the AIH-FPP-treated specimen was characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX). AIH-FPP can be used to form transferred and diffused layers of shot particles on the surface of austenitic stainless steel. The thickness of the diffusion layers of Cr shot particles tended to increase with the heating time in the AIH-FPP process, whereas the Cr concentration at the surface tended to decrease. Electrochemical polarization tests were performed in 3 wt% NaCl + H2SO4 and 20 wt% NaCl environments at 343 K using a three-electrode electrochemical cell connected to a computer driven potentiostat to examine the corrosion resistance of austenitic stainless steel treated with AIH-FPP. The pitting potential of the AIH-FPP-treated specimen was higher than that of the untreated specimen. In particular, there was clear improvement in the pitting potential of austenitic stainless steel by AIH-FPP with Cr shot particles following peening with Mo shot particles. AIH-FPP using Cr and Mo shot particles in a N2 atmosphere is an effective method of improving the electrochemical characteristics of austenitic stainless steel.
AB - Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) using Cr and Mo shot particles in a N2 atmosphere was introduced to improve the electrochemical characteristics of AISI 316 austenitic stainless steel. The surface microstructure of the AIH-FPP-treated specimen was characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX). AIH-FPP can be used to form transferred and diffused layers of shot particles on the surface of austenitic stainless steel. The thickness of the diffusion layers of Cr shot particles tended to increase with the heating time in the AIH-FPP process, whereas the Cr concentration at the surface tended to decrease. Electrochemical polarization tests were performed in 3 wt% NaCl + H2SO4 and 20 wt% NaCl environments at 343 K using a three-electrode electrochemical cell connected to a computer driven potentiostat to examine the corrosion resistance of austenitic stainless steel treated with AIH-FPP. The pitting potential of the AIH-FPP-treated specimen was higher than that of the untreated specimen. In particular, there was clear improvement in the pitting potential of austenitic stainless steel by AIH-FPP with Cr shot particles following peening with Mo shot particles. AIH-FPP using Cr and Mo shot particles in a N2 atmosphere is an effective method of improving the electrochemical characteristics of austenitic stainless steel.
KW - Austenitic stainless steel
KW - Corrosion resistance
KW - Fine particle peening
KW - Induction heating
KW - Surface modification
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U2 - 10.1016/j.surfcoat.2017.08.001
DO - 10.1016/j.surfcoat.2017.08.001
M3 - Article
AN - SCOPUS:85034428391
SN - 0257-8972
VL - 334
SP - 189
EP - 195
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -