Study of stress corrosion behaviors of B+F dual-phase X80 pipeline steel in simulated near neutral and acidic soil solution

Jing Ma; Shen-hao Wang; Hong Luo; Ting Wang; Jian-hui Li; Zhi-hao Feng; Yi-qing Chen

doi:10.1117/12.2635187

25 April 2022 Study of stress corrosion behaviors of B+F dual-phase X80 pipeline steel in simulated near neutral and acidic soil solution

Jing Ma, Shen-hao Wang, Hong Luo, Ting Wang, Jian-hui Li, Zhi-hao Feng, Yi-qing Chen

Author Affiliations +

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 122441H (2022) https://doi.org/10.1117/12.2635187
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

Slow strain rate tensile corrosion (SSRT) of B+F X80 pipeline steel in simulated near-neutral and acidic soil solution were investigated. SSRT results show that the stress corrosion of B+F dual phase X80 pipeline steel in acidic soil solution is more sensitive. The loss of section shrinkage and elongation of B+F dual-phase X80 pipeline steel after SSRT in acidic soil solution was 1.49 and 2.62 times of those in near neutral soil solution. In acidic soil solution, the stress corrosion cracking mechanism of X80 pipeline steel is intergranular fracture induced by pitting under corrosion products. Crack nucleates at the bottom of corrosion pit and propagates along the weak path--grain boundary. In near neutral soil solution, the crack is originated from inclusions and propagated mainly transgranularly. Multi-pit connection forms propagation path and some cracks propagate at two stages.

Citation Download Citation

Jing Ma, Shen-hao Wang, Hong Luo, Ting Wang, Jian-hui Li, Zhi-hao Feng, and Yi-qing Chen "Study of stress corrosion behaviors of B+F dual-phase X80 pipeline steel in simulated near neutral and acidic soil solution", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 122441H (25 April 2022); https://doi.org/10.1117/12.2635187

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KEYWORDS

Corrosion

Soil science

Hydrogen

Chemical species

Metals

Oceanography

Phase measurement

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