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<p>Corrosion and mechanical degradation of anchor systems are critical concerns in deep coal mines, where groundwater intrusion and aggressive environments prevail. This study investigates the corrosion behavior and mechanical performance of anchor rods fabricated via selective laser melting using stainless steel, die steel, and aluminum alloy powders, in comparison with conventionally forged rods. All samples were exposed to simulated mine water for accelerated corrosion testing. Mechanical degradation was evaluated through uniaxial tensile tests, while microstructural changes and corrosion products were analyzed using scanning electron microscopy and x-ray diffraction. Prior to corrosion, stainless steel rods exhibited tensile properties comparable to traditional rods. After 30&#xa0;days of corrosion, all rods showed reductions in strength and ductility. Conventional rods exhibited the least mechanical loss, while stainless steel rods, despite showing minimal mass loss and localized pitting corrosion, experienced the most significant decline in tensile properties. Die steel rods showed brittle fractures and the highest corrosion rate, while aluminum rods displayed surface delamination. Identified corrosion products included iron carbonate, iron oxides, and oxyhydroxides on steel rods, and aluminum oxide and hydroxide on aluminum alloy rods. These findings provide insights into material selection for corrosion-resistant anchorage in harsh mining environments.</p>

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Experimental Study of 3D-Printed Anchor Rods Corrosion in Simulated Mine Water

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Xiaowu Ma,
  • Mengtao Ren,
  • Xusheng Zhang,
  • Xuefeng Ji

摘要

Corrosion and mechanical degradation of anchor systems are critical concerns in deep coal mines, where groundwater intrusion and aggressive environments prevail. This study investigates the corrosion behavior and mechanical performance of anchor rods fabricated via selective laser melting using stainless steel, die steel, and aluminum alloy powders, in comparison with conventionally forged rods. All samples were exposed to simulated mine water for accelerated corrosion testing. Mechanical degradation was evaluated through uniaxial tensile tests, while microstructural changes and corrosion products were analyzed using scanning electron microscopy and x-ray diffraction. Prior to corrosion, stainless steel rods exhibited tensile properties comparable to traditional rods. After 30 days of corrosion, all rods showed reductions in strength and ductility. Conventional rods exhibited the least mechanical loss, while stainless steel rods, despite showing minimal mass loss and localized pitting corrosion, experienced the most significant decline in tensile properties. Die steel rods showed brittle fractures and the highest corrosion rate, while aluminum rods displayed surface delamination. Identified corrosion products included iron carbonate, iron oxides, and oxyhydroxides on steel rods, and aluminum oxide and hydroxide on aluminum alloy rods. These findings provide insights into material selection for corrosion-resistant anchorage in harsh mining environments.