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<p>The conveyor roller is a key component in steel production lines, but it is susceptible to surface damage due to high-temperature oxidation and corrosion, which reduces its lifespan and affects production efficiency. To address this, a single-layer, multi-channel WC-Fe-based coating was applied to the surface of 45 steel using laser cladding technology. The coating's performance was tested through high-temperature oxidation, electrochemical corrosion, and salt spray corrosion tests to simulate its working environment. Results indicate that the Fe-based gradient coating has significantly lower oxidation weight gain compared to the 45 steel substrate. The oxide film on the 45 steel is mainly Fe<sub>2</sub>O<sub>3</sub> with a loose, needle-like structure, while the Fe-based coating's oxide film consists of NiO, Cr<sub>2</sub>O<sub>3</sub>, and Fe<sub>2</sub>O<sub>3</sub> phases, forming granular and lamellar structures, demonstrating superior high-temperature oxidation resistance. Additionally, the Fe-based coating exhibits much better corrosion resistance than the 45 steel substrate in both electrochemical and salt spray tests.</p>

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Study on Oxidation Resistance and Corrosion Resistance of Laser Cladding WC-Fe-Based Coating on Steel Rolling Conveyor Roller

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Chuncheng Yan,
  • Ziqiang Yin,
  • Youhong Cao,
  • Dianxiu Xia

摘要

The conveyor roller is a key component in steel production lines, but it is susceptible to surface damage due to high-temperature oxidation and corrosion, which reduces its lifespan and affects production efficiency. To address this, a single-layer, multi-channel WC-Fe-based coating was applied to the surface of 45 steel using laser cladding technology. The coating's performance was tested through high-temperature oxidation, electrochemical corrosion, and salt spray corrosion tests to simulate its working environment. Results indicate that the Fe-based gradient coating has significantly lower oxidation weight gain compared to the 45 steel substrate. The oxide film on the 45 steel is mainly Fe2O3 with a loose, needle-like structure, while the Fe-based coating's oxide film consists of NiO, Cr2O3, and Fe2O3 phases, forming granular and lamellar structures, demonstrating superior high-temperature oxidation resistance. Additionally, the Fe-based coating exhibits much better corrosion resistance than the 45 steel substrate in both electrochemical and salt spray tests.