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This research aims to explore the electrochemical corrosion behavior of Ti–Al–V–Mo–Zr titanium alloy drill pipe materials with different solution treatment temperatures in a 10 wt% NaCl high-salt solution. The results indicate that the average grain size of α phase first decreases and then increases with the increase of solution treatment temperature. The average size of the primary α phase of the material solution-treated at 910 ℃ reaches the minimum of 27.52 μm2; the corrosion products on the surface of Ti–Al–V–Mo–Zr titanium alloy are mainly TiO2, TiO, Al2O3 and V2O5. Under identical test solution temperatures, the grain size of oxide films as the solution treatment temperature increased, open-circuit potential, corrosion current density and corrosion potential all exhibited a trend of initial decrease followed by increase, which was consistent with the variation pattern of α-phase average grain size in the material's microstructure. Due to the combined effects of α-phase content and oxide film grain size on corrosion resistance, the Ti–6Al–4V–1Mo–1Zr alloy the smallest average size of primary α phase after 910 ℃ solution treatment demonstrated optimal corrosion resistance performance in 10 wt% NaCl solution.

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Corrosion Behavior of Ti–6A1–4V–1Mo–1Zr Titanium Alloy Drill Pipe Materials in High-Salt Environments at Different Temperatures

  • 会议论文

  • 发表日期：

    2026年

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  • Lijuan Zhu,
  • Hangyu Yu,
  • Chun Feng,
  • Kai Zhang,
  • Weiwei Zhang,
  • Peng Wang,
  • Anqing Fu,
  • Chunyong Huo,
  • ZhaoXi Shen,
  • Shasha Yang

摘要

This research aims to explore the electrochemical corrosion behavior of Ti–Al–V–Mo–Zr titanium alloy drill pipe materials with different solution treatment temperatures in a 10 wt% NaCl high-salt solution. The results indicate that the average grain size of α phase first decreases and then increases with the increase of solution treatment temperature. The average size of the primary α phase of the material solution-treated at 910 ℃ reaches the minimum of 27.52 μm2; the corrosion products on the surface of Ti–Al–V–Mo–Zr titanium alloy are mainly TiO2, TiO, Al2O3 and V2O5. Under identical test solution temperatures, the grain size of oxide films as the solution treatment temperature increased, open-circuit potential, corrosion current density and corrosion potential all exhibited a trend of initial decrease followed by increase, which was consistent with the variation pattern of α-phase average grain size in the material's microstructure. Due to the combined effects of α-phase content and oxide film grain size on corrosion resistance, the Ti–6Al–4V–1Mo–1Zr alloy the smallest average size of primary α phase after 910 ℃ solution treatment demonstrated optimal corrosion resistance performance in 10 wt% NaCl solution.