Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater

Tianliang Zhao; Zhiyong Liu; Cuiwei Du; Meihui Sun; Xiaogang Li

doi:10.1016/j.ijfatigue.2018.01.008

Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater

Tianliang Zhao
, Zhiyong Liu^*
, Cuiwei Du
, Meihui Sun
, Xiaogang Li

^*Corresponding author for this work

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

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

76 Scopus citations

Abstract

Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater were studied by carried out electrochemical measurements and corrosion fatigue tests under different cathodic potentials. The results show that effects of cathodic polarization on corrosion fatigue life are different with different stress levels. When the peak stress is far below the proof stress (<0.8 σ_p0.2), the corrosion fatigue life increases with decreasing cathodic potential and reaches close to the fatigue life in air after −900 mV. However, when the peak stress is close to or beyond the proof stress (≥0.95 σ_p0.2), the corrosion fatigue life shows an trend of first increase and then decrease with decreasing cathodic potential and peaks at −850 mV. It is attributed to the synergistic effect between plastic deformation and hydrogen, which can be explained with hydrogen-promoting-plastic-deformation (HPPD) theory. Both anodic dissolution and HPPD can promote intergranular cracking. However, HPPD will not occur when the peak stress is far below the proof stress.

Original language	English
Pages (from-to)	105-114
Number of pages	10
Journal	International Journal of Fatigue
Volume	110
DOIs	https://doi.org/10.1016/j.ijfatigue.2018.01.008
State	Published - May 2018
Externally published	Yes

Keywords

Cathodic potential
Corrosion fatigue
Crack initiation
Low-carbon bainite steel
Seawater

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10.1016/j.ijfatigue.2018.01.008

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@article{b2898f66a2524d6b9bbdf67b730c7d78,

title = "Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater",

abstract = "Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater were studied by carried out electrochemical measurements and corrosion fatigue tests under different cathodic potentials. The results show that effects of cathodic polarization on corrosion fatigue life are different with different stress levels. When the peak stress is far below the proof stress (<0.8 σp0.2), the corrosion fatigue life increases with decreasing cathodic potential and reaches close to the fatigue life in air after −900 mV. However, when the peak stress is close to or beyond the proof stress (≥0.95 σp0.2), the corrosion fatigue life shows an trend of first increase and then decrease with decreasing cathodic potential and peaks at −850 mV. It is attributed to the synergistic effect between plastic deformation and hydrogen, which can be explained with hydrogen-promoting-plastic-deformation (HPPD) theory. Both anodic dissolution and HPPD can promote intergranular cracking. However, HPPD will not occur when the peak stress is far below the proof stress.",

keywords = "Cathodic potential, Corrosion fatigue, Crack initiation, Low-carbon bainite steel, Seawater",

author = "Tianliang Zhao and Zhiyong Liu and Cuiwei Du and Meihui Sun and Xiaogang Li",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = may,

doi = "10.1016/j.ijfatigue.2018.01.008",

language = "英语",

volume = "110",

pages = "105--114",

journal = "International Journal of Fatigue",

issn = "0142-1123",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater

AU - Zhao, Tianliang

AU - Liu, Zhiyong

AU - Du, Cuiwei

AU - Sun, Meihui

AU - Li, Xiaogang

PY - 2018/5

Y1 - 2018/5

N2 - Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater were studied by carried out electrochemical measurements and corrosion fatigue tests under different cathodic potentials. The results show that effects of cathodic polarization on corrosion fatigue life are different with different stress levels. When the peak stress is far below the proof stress (<0.8 σp0.2), the corrosion fatigue life increases with decreasing cathodic potential and reaches close to the fatigue life in air after −900 mV. However, when the peak stress is close to or beyond the proof stress (≥0.95 σp0.2), the corrosion fatigue life shows an trend of first increase and then decrease with decreasing cathodic potential and peaks at −850 mV. It is attributed to the synergistic effect between plastic deformation and hydrogen, which can be explained with hydrogen-promoting-plastic-deformation (HPPD) theory. Both anodic dissolution and HPPD can promote intergranular cracking. However, HPPD will not occur when the peak stress is far below the proof stress.

AB - Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater were studied by carried out electrochemical measurements and corrosion fatigue tests under different cathodic potentials. The results show that effects of cathodic polarization on corrosion fatigue life are different with different stress levels. When the peak stress is far below the proof stress (<0.8 σp0.2), the corrosion fatigue life increases with decreasing cathodic potential and reaches close to the fatigue life in air after −900 mV. However, when the peak stress is close to or beyond the proof stress (≥0.95 σp0.2), the corrosion fatigue life shows an trend of first increase and then decrease with decreasing cathodic potential and peaks at −850 mV. It is attributed to the synergistic effect between plastic deformation and hydrogen, which can be explained with hydrogen-promoting-plastic-deformation (HPPD) theory. Both anodic dissolution and HPPD can promote intergranular cracking. However, HPPD will not occur when the peak stress is far below the proof stress.

KW - Cathodic potential

KW - Corrosion fatigue

KW - Crack initiation

KW - Low-carbon bainite steel

KW - Seawater

UR - https://www.scopus.com/pages/publications/85041462334

U2 - 10.1016/j.ijfatigue.2018.01.008

DO - 10.1016/j.ijfatigue.2018.01.008

M3 - 文章

AN - SCOPUS:85041462334

SN - 0142-1123

VL - 110

SP - 105

EP - 114

JO - International Journal of Fatigue

JF - International Journal of Fatigue

ER -

Effects of cathodic polarization on corrosion fatigue life of E690 steel in simulated seawater

Abstract

Keywords

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