Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater

Hongchi Ma; Zhiyong Liu; Cuiwei Du; Huiru Wang; Caiyu Li; Xiaogang Li

doi:10.1016/j.msea.2015.05.109

Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater

Hongchi Ma
, Zhiyong Liu
, Cuiwei Du^*
, Huiru Wang
, Caiyu Li
, Xiaogang Li

^*此作品的通讯作者

University of Science and Technology Beijing
CAS - Ningbo Institute of Material Technology and Engineering

科研成果: 期刊稿件 › 文章 › 同行评审

135 引用（Scopus）

摘要

Slow strain rate tensile tests, combined with fracture morphology observation and electrochemical measurements, were conducted to investigate the SCC behavior of E690 steel in simulated seawater at open circuit potential (OCP) and various cathodic potentials. Results showed that E690 steel had a certain degree of SCC susceptibility at OCP in simulated seawater and had a high susceptibility to hydrogen embrittlement (HE) at high cathodic potentials. The SCC susceptibility showed a distinct decline at -850mV_SCE because of the inhibition of the anodic dissolution, and the fracture surface exhibited a ductile failure of dimple. The SCC susceptibility presented a remarkable increase at -950mV_SCE with a distinct feature of brittle rupture and increased drastically as the potential became more negative. The bainitic lath boundaries had an opposite effect on the SCC behaviors of E690 steel. The fracture modes at OCP and various cathodic potentials were all transgranular cracking.

源语言	英语
页（从-至）	22-31
页数	10
期刊	Materials Science and Engineering: A
卷	642
DOI	https://doi.org/10.1016/j.msea.2015.05.109
出版状态	已出版 - 6 8月 2015
已对外发布	是

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title = "Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater",

abstract = "Slow strain rate tensile tests, combined with fracture morphology observation and electrochemical measurements, were conducted to investigate the SCC behavior of E690 steel in simulated seawater at open circuit potential (OCP) and various cathodic potentials. Results showed that E690 steel had a certain degree of SCC susceptibility at OCP in simulated seawater and had a high susceptibility to hydrogen embrittlement (HE) at high cathodic potentials. The SCC susceptibility showed a distinct decline at -850mVSCE because of the inhibition of the anodic dissolution, and the fracture surface exhibited a ductile failure of dimple. The SCC susceptibility presented a remarkable increase at -950mVSCE with a distinct feature of brittle rupture and increased drastically as the potential became more negative. The bainitic lath boundaries had an opposite effect on the SCC behaviors of E690 steel. The fracture modes at OCP and various cathodic potentials were all transgranular cracking.",

keywords = "Bainitic high-strength steel, Cathodic potential, Hydrogen embrittlement, Simulated seawater, Stress corrosion cracking (SCC)",

author = "Hongchi Ma and Zhiyong Liu and Cuiwei Du and Huiru Wang and Caiyu Li and Xiaogang Li",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = aug,

day = "6",

doi = "10.1016/j.msea.2015.05.109",

language = "英语",

volume = "642",

pages = "22--31",

journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater

AU - Ma, Hongchi

AU - Liu, Zhiyong

AU - Du, Cuiwei

AU - Wang, Huiru

AU - Li, Caiyu

AU - Li, Xiaogang

PY - 2015/8/6

Y1 - 2015/8/6

N2 - Slow strain rate tensile tests, combined with fracture morphology observation and electrochemical measurements, were conducted to investigate the SCC behavior of E690 steel in simulated seawater at open circuit potential (OCP) and various cathodic potentials. Results showed that E690 steel had a certain degree of SCC susceptibility at OCP in simulated seawater and had a high susceptibility to hydrogen embrittlement (HE) at high cathodic potentials. The SCC susceptibility showed a distinct decline at -850mVSCE because of the inhibition of the anodic dissolution, and the fracture surface exhibited a ductile failure of dimple. The SCC susceptibility presented a remarkable increase at -950mVSCE with a distinct feature of brittle rupture and increased drastically as the potential became more negative. The bainitic lath boundaries had an opposite effect on the SCC behaviors of E690 steel. The fracture modes at OCP and various cathodic potentials were all transgranular cracking.

AB - Slow strain rate tensile tests, combined with fracture morphology observation and electrochemical measurements, were conducted to investigate the SCC behavior of E690 steel in simulated seawater at open circuit potential (OCP) and various cathodic potentials. Results showed that E690 steel had a certain degree of SCC susceptibility at OCP in simulated seawater and had a high susceptibility to hydrogen embrittlement (HE) at high cathodic potentials. The SCC susceptibility showed a distinct decline at -850mVSCE because of the inhibition of the anodic dissolution, and the fracture surface exhibited a ductile failure of dimple. The SCC susceptibility presented a remarkable increase at -950mVSCE with a distinct feature of brittle rupture and increased drastically as the potential became more negative. The bainitic lath boundaries had an opposite effect on the SCC behaviors of E690 steel. The fracture modes at OCP and various cathodic potentials were all transgranular cracking.

KW - Bainitic high-strength steel

KW - Cathodic potential

KW - Hydrogen embrittlement

KW - Simulated seawater

KW - Stress corrosion cracking (SCC)

UR - https://www.scopus.com/pages/publications/84934269362

U2 - 10.1016/j.msea.2015.05.109

DO - 10.1016/j.msea.2015.05.109

M3 - 文章

AN - SCOPUS:84934269362

SN - 0921-5093

VL - 642

SP - 22

EP - 31

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater

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