辽宁石油化工大学学报 ›› 2025, Vol. 45 ›› Issue (6): 68-74.DOI: 10.12422/j.issn.1672-6952.2025.06.009

• 机械工程 • 上一篇    下一篇

弹、塑性应变对X90管线钢腐蚀行为的影响

白淞元(), 孙东旭, 吴明()   

  1. 辽宁石油化工大学 石油天然气工程学院,辽宁 抚顺 113001
  • 收稿日期:2025-02-07 修回日期:2025-03-09 出版日期:2025-12-25 发布日期:2025-12-07
  • 通讯作者: 吴明
  • 作者简介:白淞元(2000⁃),男,硕士研究生,从事油气输送管道腐蚀与防护方面的研究;E⁃mail:bsy_lnpu@163.com
  • 基金资助:
    国家自然科学基金项目(52274062);国家自然科学基金项目(52404058)

Effect of Elastic and Plastic Strain on Corrosion Behavior of X90 Pipeline Steel

Songyuan BAI(), Dongxu SUN, Ming WU()   

  1. College of Petroleum Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2025-02-07 Revised:2025-03-09 Published:2025-12-25 Online:2025-12-07
  • Contact: Ming WU

摘要:

应用慢应变速率拉伸实验、原位电化学测试、扫描电镜观察、XRD测试等实验方法,探究了南海海洋干湿交替环境下弹性应变和塑性应变对X90管线钢腐蚀行为的影响及其机理。结果表明,在弹性应变区,随着应变的增大,X90管线钢的腐蚀敏感性增大,但影响并不显著;在塑性应变区,随着应变的增大,X90管线钢腐蚀敏感性显著增大;当塑性应变达到5.5%时,X90管线钢表面的腐蚀情况最为严重;应变对X90管线钢腐蚀行为的影响归因于X90管线钢受到外加应力后产生的机械?电化学效应,在海洋干湿交替环境下X90管线钢的腐蚀表现为以阳极溶解为主,以析氢为辅。腐蚀产物分析结果表明,应变对腐蚀产物类型无明显影响。

关键词: 弹性应变, 塑性应变, X90管线钢, 机械?电化学效应, 电化学测试, 腐蚀形貌表征

Abstract:

The effect of elastic and plastic strain on corrosion behavior of X90 pipeline steel in a simulated marine alternating dry/wet environment was investigated by means of slow strain rate tensile test, in?situ electrochemical measurement, scanning electron microscope (SEM) observation and X-ray Diffraction (XRD) test. The results indicate that in the elastic strain regime, the corrosion susceptibility of X90 pipeline steel increases with the enhancement of elastic strain, but the effect is not pronounced. In the plastic strain regime, the corrosion susceptibility of X90 pipeline steel increases significantly with the enhancement of plastic strain. The most severe surface corrosion of X90 pipeline steel occurs at a plastic strain level of 5.5%. It is attributed to the mechano-electrochemical effect of X90 pipeline steel under external stress. The corrosion mechanism is anode dissolution dominated and hydrogen evolution assisted. The result of corrosion product analysis show that strain has no significant effect on the type of corrosion products.

Key words: Plastic strain, Elastic strain, X90 pipeline steel, Mechano?electrochemical effect, Electrochemical test, Corrosion morphology characterization

中图分类号: 

引用本文

白淞元, 孙东旭, 吴明. 弹、塑性应变对X90管线钢腐蚀行为的影响[J]. 辽宁石油化工大学学报, 2025, 45(6): 68-74.

Songyuan BAI, Dongxu SUN, Ming WU. Effect of Elastic and Plastic Strain on Corrosion Behavior of X90 Pipeline Steel[J]. Journal of Liaoning Petrochemical University, 2025, 45(6): 68-74.

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               https://journal.lnpu.edu.cn/CN/Y2025/V45/I6/68