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The influence of nitrate ions on the corrosion of Q420 steel in chloride environment was studied by electrochemical means. The results show that in solutions where the ratio of nitrate ions to chloride ions is greater than 0.09%, nitrate ions have an inhibitory effect on the corrosion of Q420 steel in chloride environment. However, no inhibitory effect was observed in solutions where the ratio of nitrate ions to chloride ions is less than 0.09%. Furthermore, nitrate ions are unable to inhibit pitting corrosion of Q420 steel in chloride environment.

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Inhibiting Effect of NO3− on the Corrosion Behavior of Q420 Steel in Cl− Solution

  • 会议论文

  • 发表日期：

    2026年

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  • KaiZhi Sha,
  • YiQing Chen,
  • XiDong Su,
  • HongYu San,
  • Bin Zhong,
  • Peng Gao,
  • Lin Li,
  • FangFang Ai,
  • Zihan Yu

摘要

The influence of nitrate ions on the corrosion of Q420 steel in chloride environment was studied by electrochemical means. The results show that in solutions where the ratio of nitrate ions to chloride ions is greater than 0.09%, nitrate ions have an inhibitory effect on the corrosion of Q420 steel in chloride environment. However, no inhibitory effect was observed in solutions where the ratio of nitrate ions to chloride ions is less than 0.09%. Furthermore, nitrate ions are unable to inhibit pitting corrosion of Q420 steel in chloride environment.