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Stress corrosion cracking of pipeline steels in near-neutral pH solutions: the role of mechanochemical and chemomechanical effects

1 Institute of Natural Gases and Gas Technologies-Gazprom VNIIGAZ LLC, Moscow Oblast, Razvilka Settlement, Russia
2 Dept. of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel

Special Issues: Corrosion

The review presents brief theoretical foundations of the mechanochemical and chemomechanical surface effects (MCE and CME) associated with corrosion-mechanical destruction of metals, considers the results of various scientific publications that studied the mechanochemical behavior of steels in near-neutral pH media, and analyzes the application of the results of such studies with the purpose of their practical use in the stress corrosion cracking (SCC) prevention. The article attempts to summarize the results of modern experimental studies and numerical modeling of mechanochemical and chemomechanical processes occurring on the surface of pipe steels and at the tip of the crack under the simultaneous effects of stresses/strains and corrosion media. The influence of these processes on the mechanism and kinetics of corrosion cracking of pipe steels in near-neutral aqueous solutions is discussed. The criteria for the quantitative assessment of the influence of MCE and CME on the SCC of pipeline steels are considered. The analysis of research methods for the study of MCE and CME, was carried out with the aim of further developing a unified methodological approach to assessment and quantification in predicting SCC in neutral media.
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Keywords near-neutral pH SCC (NNpHSCC); pipeline; mechanochemical; chemomechanical effects

Citation: Roman I. Bogdanov, Yaakov B. Unigovski, Emmanuel M. Gutman, Iliya V. Ryakhovskikh, Roni Z. Shneck. Stress corrosion cracking of pipeline steels in near-neutral pH solutions: the role of mechanochemical and chemomechanical effects. AIMS Materials Science, 2019, 6(6): 1065-1085. doi: 10.3934/matersci.2019.6.1065

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