Journal of Materials Engineering and Performance

, Volume 28, Issue 11, pp 6931–6941 | Cite as

Effect of AC Current Density on the Stress Corrosion Cracking Behavior and Mechanism of E690 High-Strength Steel in Simulated Seawater

  • Yue Pan
  • Zhiyong LiuEmail author
  • Yadan Zhang
  • Xiaogang Li
  • Cuiwei Du


In this work, we studied the impact of alternating current (AC) density on the stress corrosion cracking (SCC) behavior and mechanism of E690 high-strength steel in simulated seawater with electrochemical measurements, U-bend immersion tests and slow strain rate tensile tests. Results demonstrate that AC enhances both anodic and cathodic processes, especially localized anodic dissolution and hydrogen evolution, which manifests as the increase in icorr with AC current density rising. Therefore, AC leads to higher SCC susceptibility. Accordingly, SCC is dominated by anodic dissolution (AD) at low AC current density while in a mixed control of AD and hydrogen embrittlement (HE) at high AC current density as a result of increasing hydrogen concentration. Besides, 50 A/m2 corresponds to the threshold hydrogen concentration of the “hydrogen-induced plasticity to HE” transformation, which is due to the different interactions of dislocation and hydrogen.


AC stray current E690 steel SCC Simulated seawater 



The authors gratefully acknowledge financial support from National Environmental Corrosion Platform of China (NECP) and National Natural Science Foundation of China (No. 51471034 and 51771028).


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Copyright information

© ASM International 2019

Authors and Affiliations

  • Yue Pan
    • 1
  • Zhiyong Liu
    • 1
    Email author
  • Yadan Zhang
    • 1
  • Xiaogang Li
    • 1
    • 2
  • Cuiwei Du
    • 1
  1. 1.Corrosion and Protection CenterUniversity of Science and Technology BeijingBeijingChina
  2. 2.Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingboChina

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