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<p>High-performance materials used in gas turbines aerospace engines and marine components need advanced surface protection to survive harsh operating conditions. CoMoCrSi alloys strengthened with WC–12Co demonstrate effectiveness at protecting against extreme temperature oxidation and corrosion. Our research analyzes how hot corrosion affects titanium coated with CoMoCrSi/WC–12Co while exploring its microstructural changes and the ways it breaks down. Hot corrosion test conditions for this study contained 50 cycles of exposure at 705&#xa0;°C while using Na<sub>2</sub>SO<sub>4</sub> and V<sub>2</sub>O<sub>5</sub> salts. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD) studied the sample's degradation. Our findings showed the development of protective oxide barriers with added WC helping the coating resist extreme heat damage. The uncorroded test material achieved 239.3 H<sub>V</sub> but showed 603.3 H<sub>V</sub> after enduring corrosion testing. The material mapping shows corrosion products that verify both oxidation and oxide layer development. The oxide layer showed weak protection against degradation because its breakdown happened only in targeted locations. Coating stability regulates how fast deterioration happens while oxide formation protects against damages.</p>

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Investigation of Microstructural and Hot Corrosion Behaviour of CoMoCrSi/WC–12Co Microwave Cladding on Titanium Substrate

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • C. Durga Prasad,
  • H. R. Manjunath,
  • Mahantesh S. Matur,
  • H. B. Shivaprasad,
  • C. Solaimuthu,
  • M. Haridass,
  • Shrishail B. Sollapur,
  • Saravana Bavan,
  • T. A. Sudarshan

摘要

High-performance materials used in gas turbines aerospace engines and marine components need advanced surface protection to survive harsh operating conditions. CoMoCrSi alloys strengthened with WC–12Co demonstrate effectiveness at protecting against extreme temperature oxidation and corrosion. Our research analyzes how hot corrosion affects titanium coated with CoMoCrSi/WC–12Co while exploring its microstructural changes and the ways it breaks down. Hot corrosion test conditions for this study contained 50 cycles of exposure at 705 °C while using Na2SO4 and V2O5 salts. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD) studied the sample's degradation. Our findings showed the development of protective oxide barriers with added WC helping the coating resist extreme heat damage. The uncorroded test material achieved 239.3 HV but showed 603.3 HV after enduring corrosion testing. The material mapping shows corrosion products that verify both oxidation and oxide layer development. The oxide layer showed weak protection against degradation because its breakdown happened only in targeted locations. Coating stability regulates how fast deterioration happens while oxide formation protects against damages.