Characterization of mechanical surface treated 304 stainless steel by electrochemical impedance spectroscopy

Teguh Dwi Widodo; Azizul Helmi Bin Sofian; Ryouji Suzuki; Youhei Hirohata; Kazuhiko Noda

doi:10.1166/sam.2014.2063

Characterization of mechanical surface treated 304 stainless steel by electrochemical impedance spectroscopy

Teguh Dwi Widodo, Azizul Helmi Bin Sofian, Ryouji Suzuki, Youhei Hirohata, Kazuhiko Noda

Research output: Contribution to journal › Article

Abstract

The electrochemical behaviors of 304 stainless steel before and after mechanical surface treatment were investigated by electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Prior to EIS measurements, potentiodynamic polarization was conducted to characterize the passive potential range and localized potential behaviors. The potentiodynamic polarization results demonstrated a localized corrosion potential shift towards a more noble direction and an expanded passive potential range after the shot peening process. The EIS results showed that the surface barrier of 304 stainless steel improved after the shot peening process. In addition, field emission scanning electron microscopy (FE-SEM) observations revealed grain refinement on the 304 stainless steel surface after the shot peening process. The observed improvement in localized corrosion resistance may be attributable to grain refinement of the 304 stainless steel surface.

Original language	English
Pages (from-to)	2179-2184
Number of pages	6
Journal	Science of Advanced Materials
Volume	6
Issue number	10
DOIs	https://doi.org/10.1166/sam.2014.2063
Publication status	Published - 2014 Jan 1

Keywords

304 stainless steel
Corrosion
Electrochemical impedance spectroscopy
Mechanical surface treatment
Shot peening

ASJC Scopus subject areas

Materials Science(all)

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10.1166/sam.2014.2063

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Widodo, T. D., Bin Sofian, A. H., Suzuki, R., Hirohata, Y., & Noda, K. (2014). Characterization of mechanical surface treated 304 stainless steel by electrochemical impedance spectroscopy. Science of Advanced Materials, 6(10), 2179-2184. https://doi.org/10.1166/sam.2014.2063

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abstract = "The electrochemical behaviors of 304 stainless steel before and after mechanical surface treatment were investigated by electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Prior to EIS measurements, potentiodynamic polarization was conducted to characterize the passive potential range and localized potential behaviors. The potentiodynamic polarization results demonstrated a localized corrosion potential shift towards a more noble direction and an expanded passive potential range after the shot peening process. The EIS results showed that the surface barrier of 304 stainless steel improved after the shot peening process. In addition, field emission scanning electron microscopy (FE-SEM) observations revealed grain refinement on the 304 stainless steel surface after the shot peening process. The observed improvement in localized corrosion resistance may be attributable to grain refinement of the 304 stainless steel surface.",

keywords = "304 stainless steel, Corrosion, Electrochemical impedance spectroscopy, Mechanical surface treatment, Shot peening",

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AU - Widodo, Teguh Dwi

AU - Bin Sofian, Azizul Helmi

AU - Suzuki, Ryouji

AU - Hirohata, Youhei

AU - Noda, Kazuhiko

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The electrochemical behaviors of 304 stainless steel before and after mechanical surface treatment were investigated by electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Prior to EIS measurements, potentiodynamic polarization was conducted to characterize the passive potential range and localized potential behaviors. The potentiodynamic polarization results demonstrated a localized corrosion potential shift towards a more noble direction and an expanded passive potential range after the shot peening process. The EIS results showed that the surface barrier of 304 stainless steel improved after the shot peening process. In addition, field emission scanning electron microscopy (FE-SEM) observations revealed grain refinement on the 304 stainless steel surface after the shot peening process. The observed improvement in localized corrosion resistance may be attributable to grain refinement of the 304 stainless steel surface.

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KW - Electrochemical impedance spectroscopy

KW - Mechanical surface treatment

KW - Shot peening

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