External Stress Corrosion Cracking Risk Factors of High Grade Pipeline Steel-Reference-Cited by-同舟云学术

External Stress Corrosion Cracking Risk Factors of High Grade Pipeline Steel

Published:2020-05 Issue: Volume:993 Page:1270-1276
ISSN:1662-9752
Container-title:Materials Science Forum
language:
Short-container-title:MSF

Author:

Zhu Li Xia¹,Luo Jin Heng¹,Wu Gang¹,Li Li Feng¹,Li Lei¹,Wu Yi²

Affiliation:

1. CNPC Tubular Goods Research Institute

2. Petrochina West Pipeline Company

Abstract

The influence weights of various sensitive factors, such as steel grade, applied potential, temperature and soil environment, on stress corrosion cracking behavior of high-grade pipeline steel were studied by means of orthogonal test at mixed level and slow strain rate test. The stress corrosion behavior of X80 pipeline steel in near neutral and high pH simulated soil solution under overprotection potential was observed by SEM. The results showed that the applied potential has the greatest weight on stress corrosion index of ISSRT, followed by temperature, steel grade and soil environment. X80 pipeline steel exhibits high stress corrosion sensitivity in near-neutral and high pH simulated soil solutions at applied potential of -1500mV, and its SCC mechanism is hydrogen embrittlement (HE). This study can provide guidance for practical engineering application of pipeline steel.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.scientific.net/MSF.993.1270.pdf

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