Effect of Nano-sized Cu-Rich Phase on Microbiological Corrosion Behavior of Cu and Ni-Added Steel for Oil Country Tubular Goods

DOI Web Site 42 References
  • Shi Xianbo
    State Key Laboratory of Metal Material for Marine Equipment and Application Institute of Metal Research, Chinese Academy of Sciences
  • Zeng Yunpeng
    Institute of Metal Research, Chinese Academy of Sciences China Special Equipment Inspection & Research Institute Yangtze Delta Branch
  • Ren Yi
    State Key Laboratory of Metal Material for Marine Equipment and Application
  • Yan Wei
    Institute of Metal Research, Chinese Academy of Sciences
  • Yang Xu
    China Special Equipment Inspection & Research Institute Yangtze Delta Branch
  • Wu Guanghui
    Hengyang Valin Steel Tube Co., Ltd.
  • Shan Yiyin
    Institute of Metal Research, Chinese Academy of Sciences
  • Yang Ke
    Institute of Metal Research, Chinese Academy of Sciences

Description

<p>The Cu-bearing antibacterial low-alloyed steel pipe is a new strategy to mitigate microbiologically influenced corrosion (MIC) for oil and gas industry. It can effectively alleviate the occurrence of bacterial corrosion, but cannot avoid the MIC totally. To enhance the resistance to MIC of Cu-bearing low-alloyed steel, the MIC behavior of a Cu and Ni-added experimental steel with different nano-sized Cu-rich precipitates was investigated. Results showed that the synergistic effect of antibacterial ability of nano-sized Cu-rich precipitates and protective Cu–Ni enrichment layer formed on the steel surface contributed to the good MIC resistance. Although the Cu-rich precipitates possessed antibacterial actively, they also increased the surface potential difference simultaneously, resulting in promoting MIC. The extremely fine and dispersed Cu-rich precipitates with high-density was the preferred microstructure to achieve better MIC resistance for the steel.</p>

Journal

  • ISIJ International

    ISIJ International 64 (6), 1047-1056, 2024-04-15

    The Iron and Steel Institute of Japan

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