Acta Metallurgica Sinica (English Letters) ›› 2024, Vol. 37 ›› Issue (4): 678-694.DOI: 10.1007/s40195-023-01637-1

Previous Articles     Next Articles

Effects of Environmental Factors on Corrosion Behavior of E690 Steel in Simulated Marine Environment

Jingjing Peng, Jing Liu(), Shen Zhang, Zhihui Wang, Xian Zhang, Kaiming Wu()   

  1. Collaborative Innovation Center for Advanced Steels, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China
  • Received:2023-09-20 Revised:2023-10-18 Accepted:2023-10-21 Online:2024-04-10 Published:2024-01-02
  • Contact: Jing Liu, liujing19880111@163.com; Kaiming Wu, wukaiming@wust.edu.cn

Abstract:

The effects of hydrostatic pressure, dissolved oxygen, temperature and flow velocity, and their interaction on the corrosion rates of E690 high-strength steel (HSS) in simulated marine environments were studied using response surface methodology. The results show that the flow velocity exerts the most significant influence on the corrosion rate of E690 HSS. Consequently, the corrosion behavior of E690 HSS under varying flow velocities were analyzed profoundly from initial pitting corrosion to long-term corrosion properties. The results indicate that the flow state facilitates the mass transfer and enhances the adsorption tendency of Cl by enhancing the electrochemical activity of the steel surface. These factors accelerate the electrochemical reactions, resulting in increased pitting density, depth and the long-term corrosion rates in dynamic seawater environments.

Key words: E690 steel, Simulated marine environment, Corrosion behavior, Flow velocity, Response surface methodology (RSM)