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<p>This study comprehensively investigated the influence of varied hot rolling temperatures on the microstructure, mechanical properties, and corrosion behavior of Mg-2Zn-0.1Ca alloy in a simulated physiological environment. Advanced characterization techniques, including Field Emission Scanning Electron Microscopy (FESEM) and Electron Backscatter Diffraction (EBSD), were employed for detailed microstructural analysis. Corrosion performance was systematically evaluated through mass loss, hydrogen evolution, and electrochemical polarization tests. Results indicate that increasing rolling temperature progressively enlarged the alloy’s grain size, peaking at 15.06&#xa0;μm at 400 ℃. Concurrently, the degree of dynamic recrystallization (DRX) and the fraction of high-angle grain boundaries (HAGBs) exhibited a synchronized increase. Notably, the alloy rolled at 300 ℃ displayed the highest dislocation density, attributed to a significantly higher rate of dislocation multiplication than annihilation. The ultimate tensile strength (UTS) generally decreased with rising rolling temperature, with the 250 ℃ rolled specimen achieving the maximum UTS of 218.34&#xa0;MPa. Conversely, the 300 ℃ rolled alloy exhibited superior elongation (EL) of 19.8%. The damping performance at room temperature exhibits a monotonically increasing trend with rising rolling temperature, with the alloy achieving optimal damping properties at 400 ℃. Regarding corrosion performance, at the 400 ℃ rolling process, the alloy’s corrosion rate is minimized. This superior performance is primarily attributed to its lower grain boundary density, more homogeneous microstructure, and the formation of a dense passive film on the surface, which synergistically impede further corrosive medium penetration.</p>

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Corrosion failure behavior of Mg-2Zn-0.1Ca alloy in simulated physiological environment: influence of rolling temperature

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Kaifei Zhang,
  • Youping Sun,
  • Wangzhen Li,
  • Jiangmei He,
  • Wengang Chen,
  • Chengwei He

摘要

This study comprehensively investigated the influence of varied hot rolling temperatures on the microstructure, mechanical properties, and corrosion behavior of Mg-2Zn-0.1Ca alloy in a simulated physiological environment. Advanced characterization techniques, including Field Emission Scanning Electron Microscopy (FESEM) and Electron Backscatter Diffraction (EBSD), were employed for detailed microstructural analysis. Corrosion performance was systematically evaluated through mass loss, hydrogen evolution, and electrochemical polarization tests. Results indicate that increasing rolling temperature progressively enlarged the alloy’s grain size, peaking at 15.06 μm at 400 ℃. Concurrently, the degree of dynamic recrystallization (DRX) and the fraction of high-angle grain boundaries (HAGBs) exhibited a synchronized increase. Notably, the alloy rolled at 300 ℃ displayed the highest dislocation density, attributed to a significantly higher rate of dislocation multiplication than annihilation. The ultimate tensile strength (UTS) generally decreased with rising rolling temperature, with the 250 ℃ rolled specimen achieving the maximum UTS of 218.34 MPa. Conversely, the 300 ℃ rolled alloy exhibited superior elongation (EL) of 19.8%. The damping performance at room temperature exhibits a monotonically increasing trend with rising rolling temperature, with the alloy achieving optimal damping properties at 400 ℃. Regarding corrosion performance, at the 400 ℃ rolling process, the alloy’s corrosion rate is minimized. This superior performance is primarily attributed to its lower grain boundary density, more homogeneous microstructure, and the formation of a dense passive film on the surface, which synergistically impede further corrosive medium penetration.