Direct evidence of passive film growth on 316 stainless steel in alkaline solution

Bowei Zhang; Shiji Hao; Junsheng Wu; Xiaogang Li; Chaojiang Li; Xiaowei Di; Yizhong Huang

doi:10.1016/j.matchar.2017.05.013

Direct evidence of passive film growth on 316 stainless steel in alkaline solution

Bowei Zhang, Shiji Hao, Junsheng Wu^*, Xiaogang Li, Chaojiang Li, Xiaowei Di, Yizhong Huang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Evolution of the oxide films formed on the surface of 316 stainless steel needles during the electrochemical polarization in 0.1 M NaOH solution is investigated by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). During the polarization process, the films can grow from ~ 4 nm to dozens of nanometers and are composed of crystalline structures incorporated with amorphous phases. Additionally, Cr (III) species that are formed at low potentials will transform into Cr (VI) species in secondary passive region. Fe element is present as Fe₃O₄-like spinel oxides while no Fe₂O₃ is found in the films. The Fe/Cr ratio increases with the increase of applied potential.

Original language	English
Pages (from-to)	168-174
Number of pages	7
Journal	Materials Characterization
Volume	131
DOIs	https://doi.org/10.1016/j.matchar.2017.05.013
Publication status	Published - Sept 2017
Externally published	Yes

Keywords

Passive film
STEM-EDX
Secondary passive film
Stainless steel
TEM
Transpassive film

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10.1016/j.matchar.2017.05.013

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title = "Direct evidence of passive film growth on 316 stainless steel in alkaline solution",

abstract = "Evolution of the oxide films formed on the surface of 316 stainless steel needles during the electrochemical polarization in 0.1 M NaOH solution is investigated by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). During the polarization process, the films can grow from ~ 4 nm to dozens of nanometers and are composed of crystalline structures incorporated with amorphous phases. Additionally, Cr (III) species that are formed at low potentials will transform into Cr (VI) species in secondary passive region. Fe element is present as Fe3O4-like spinel oxides while no Fe2O3 is found in the films. The Fe/Cr ratio increases with the increase of applied potential.",

keywords = "Passive film, STEM-EDX, Secondary passive film, Stainless steel, TEM, Transpassive film",

author = "Bowei Zhang and Shiji Hao and Junsheng Wu and Xiaogang Li and Chaojiang Li and Xiaowei Di and Yizhong Huang",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = sep,

doi = "10.1016/j.matchar.2017.05.013",

language = "English",

volume = "131",

pages = "168--174",

journal = "Materials Characterization",

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TY - JOUR

T1 - Direct evidence of passive film growth on 316 stainless steel in alkaline solution

AU - Zhang, Bowei

AU - Hao, Shiji

AU - Wu, Junsheng

AU - Li, Xiaogang

AU - Li, Chaojiang

AU - Di, Xiaowei

AU - Huang, Yizhong

PY - 2017/9

Y1 - 2017/9

N2 - Evolution of the oxide films formed on the surface of 316 stainless steel needles during the electrochemical polarization in 0.1 M NaOH solution is investigated by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). During the polarization process, the films can grow from ~ 4 nm to dozens of nanometers and are composed of crystalline structures incorporated with amorphous phases. Additionally, Cr (III) species that are formed at low potentials will transform into Cr (VI) species in secondary passive region. Fe element is present as Fe3O4-like spinel oxides while no Fe2O3 is found in the films. The Fe/Cr ratio increases with the increase of applied potential.

AB - Evolution of the oxide films formed on the surface of 316 stainless steel needles during the electrochemical polarization in 0.1 M NaOH solution is investigated by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). During the polarization process, the films can grow from ~ 4 nm to dozens of nanometers and are composed of crystalline structures incorporated with amorphous phases. Additionally, Cr (III) species that are formed at low potentials will transform into Cr (VI) species in secondary passive region. Fe element is present as Fe3O4-like spinel oxides while no Fe2O3 is found in the films. The Fe/Cr ratio increases with the increase of applied potential.

KW - Passive film

KW - STEM-EDX

KW - Secondary passive film

KW - Stainless steel

KW - TEM

KW - Transpassive film

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U2 - 10.1016/j.matchar.2017.05.013

DO - 10.1016/j.matchar.2017.05.013

M3 - Article

AN - SCOPUS:85021755442

SN - 1044-5803

VL - 131

SP - 168

EP - 174

JO - Materials Characterization

JF - Materials Characterization

ER -

Direct evidence of passive film growth on 316 stainless steel in alkaline solution

Abstract

Keywords

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