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<p>This study presents a novel electrochemical comparison of WC–Co and Cr<sub>3</sub>C<sub>2</sub> coatings on steel substrates, addressing a critical gap in benchmarking corrosion resistance under controlled alkaline conditions. In 3.5% NaCl, potentiodynamic polarization revealed corrosion rates of 0.065668&#xa0;mm/year for uncoated steel, 0.023323&#xa0;mm/year for WC–Co, and a significantly lower 0.007667&#xa0;mm/year for Cr<sub>3</sub>C<sub>2</sub>. The enhanced performance of Cr<sub>3</sub>C<sub>2</sub> is linked to its superior passivation and microstructural stability. These findings establish a unified framework for evaluating coating efficacy in aggressive environments and offer actionable guidance for material selection in corrosion-critical sectors such as offshore, mining, and chemical processing.</p>

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Electrochemical Performance of Carbide Coatings for Corrosion Resistance in Chloride Environments

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Roshan Kuruvila,
  • R. Jayakrishnan,
  • R. Anish,
  • Amal Chummar,
  • S. Thirumalai Kumaran

摘要

This study presents a novel electrochemical comparison of WC–Co and Cr3C2 coatings on steel substrates, addressing a critical gap in benchmarking corrosion resistance under controlled alkaline conditions. In 3.5% NaCl, potentiodynamic polarization revealed corrosion rates of 0.065668 mm/year for uncoated steel, 0.023323 mm/year for WC–Co, and a significantly lower 0.007667 mm/year for Cr3C2. The enhanced performance of Cr3C2 is linked to its superior passivation and microstructural stability. These findings establish a unified framework for evaluating coating efficacy in aggressive environments and offer actionable guidance for material selection in corrosion-critical sectors such as offshore, mining, and chemical processing.