Effect of pH value on stress corrosion cracking of X70 pipeline steel in acidic soil environment

Zhiyong Liu; Cuiwei Du; Xin Zhang; Fuming Wang; Xiaogang Li

doi:10.1007/s40195-012-0216-z

Effect of pH value on stress corrosion cracking of X70 pipeline steel in acidic soil environment

Zhiyong Liu
, Cuiwei Du
, Xin Zhang
, Fuming Wang
, Xiaogang Li^*

^*Corresponding author for this work

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

37 Scopus citations

Abstract

The effect of pH value on the stress corrosion cracking (SCC) of API X70 pipeline steel in simulated acidic soil solutions was investigated by using slow strain rate test, electrochemical polarization curves, electrochemical impedance spectroscopy, and scanning electron microscopy. pH plays an important role in the susceptibility and electrochemical mechanism of SCC. The pH higher than 5 has no significant effect on electrochemical processes. By contrast, the pH lower than 5 intensifies cathodic hydrogen evolution reactions, thus increasing the cathodic current and corrosion potential. Under different pH values, the SCC mechanism of X70 pipeline steel varies among anodic dissolution (AD), hydrogen embrittlement (HE), and the combination of AD and HE (AD + HE) with variations of applied potential. At -850 mV_SCE, the SCC mechanism is HE if pH is less than 4 or AD + HE if pH value is more positive.

Original language	English
Pages (from-to)	489-496
Number of pages	8
Journal	Acta Metallurgica Sinica (English Letters)
Volume	26
Issue number	4
DOIs	https://doi.org/10.1007/s40195-012-0216-z
State	Published - Aug 2013
Externally published	Yes

Keywords

Soil environment
Stress corrosion cracking
X70 pipeline steel
pH

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10.1007/s40195-012-0216-z

Cite this

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title = "Effect of pH value on stress corrosion cracking of X70 pipeline steel in acidic soil environment",

abstract = "The effect of pH value on the stress corrosion cracking (SCC) of API X70 pipeline steel in simulated acidic soil solutions was investigated by using slow strain rate test, electrochemical polarization curves, electrochemical impedance spectroscopy, and scanning electron microscopy. pH plays an important role in the susceptibility and electrochemical mechanism of SCC. The pH higher than 5 has no significant effect on electrochemical processes. By contrast, the pH lower than 5 intensifies cathodic hydrogen evolution reactions, thus increasing the cathodic current and corrosion potential. Under different pH values, the SCC mechanism of X70 pipeline steel varies among anodic dissolution (AD), hydrogen embrittlement (HE), and the combination of AD and HE (AD + HE) with variations of applied potential. At -850 mVSCE, the SCC mechanism is HE if pH is less than 4 or AD + HE if pH value is more positive.",

keywords = "Soil environment, Stress corrosion cracking, X70 pipeline steel, pH",

author = "Zhiyong Liu and Cuiwei Du and Xin Zhang and Fuming Wang and Xiaogang Li",

year = "2013",

month = aug,

doi = "10.1007/s40195-012-0216-z",

language = "英语",

volume = "26",

pages = "489--496",

journal = "Acta Metallurgica Sinica (English Letters)",

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TY - JOUR

T1 - Effect of pH value on stress corrosion cracking of X70 pipeline steel in acidic soil environment

AU - Liu, Zhiyong

AU - Du, Cuiwei

AU - Zhang, Xin

AU - Wang, Fuming

AU - Li, Xiaogang

PY - 2013/8

Y1 - 2013/8

N2 - The effect of pH value on the stress corrosion cracking (SCC) of API X70 pipeline steel in simulated acidic soil solutions was investigated by using slow strain rate test, electrochemical polarization curves, electrochemical impedance spectroscopy, and scanning electron microscopy. pH plays an important role in the susceptibility and electrochemical mechanism of SCC. The pH higher than 5 has no significant effect on electrochemical processes. By contrast, the pH lower than 5 intensifies cathodic hydrogen evolution reactions, thus increasing the cathodic current and corrosion potential. Under different pH values, the SCC mechanism of X70 pipeline steel varies among anodic dissolution (AD), hydrogen embrittlement (HE), and the combination of AD and HE (AD + HE) with variations of applied potential. At -850 mVSCE, the SCC mechanism is HE if pH is less than 4 or AD + HE if pH value is more positive.

AB - The effect of pH value on the stress corrosion cracking (SCC) of API X70 pipeline steel in simulated acidic soil solutions was investigated by using slow strain rate test, electrochemical polarization curves, electrochemical impedance spectroscopy, and scanning electron microscopy. pH plays an important role in the susceptibility and electrochemical mechanism of SCC. The pH higher than 5 has no significant effect on electrochemical processes. By contrast, the pH lower than 5 intensifies cathodic hydrogen evolution reactions, thus increasing the cathodic current and corrosion potential. Under different pH values, the SCC mechanism of X70 pipeline steel varies among anodic dissolution (AD), hydrogen embrittlement (HE), and the combination of AD and HE (AD + HE) with variations of applied potential. At -850 mVSCE, the SCC mechanism is HE if pH is less than 4 or AD + HE if pH value is more positive.

KW - Soil environment

KW - Stress corrosion cracking

KW - X70 pipeline steel

KW - pH

UR - https://www.scopus.com/pages/publications/84880663258

U2 - 10.1007/s40195-012-0216-z

DO - 10.1007/s40195-012-0216-z

M3 - 文章

AN - SCOPUS:84880663258

SN - 1006-7191

VL - 26

SP - 489

EP - 496

JO - Acta Metallurgica Sinica (English Letters)

JF - Acta Metallurgica Sinica (English Letters)

IS - 4

ER -

Effect of pH value on stress corrosion cracking of X70 pipeline steel in acidic soil environment

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Keywords

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