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<p>The present study implicated the wear and corrosion performance of Al<sub>2</sub>O<sub>3</sub> and Cr<sub>3</sub>C<sub>2</sub> coatings on IS2062. The specimens were prepared using the optimal parameters adopted by plasma spray technique. The investigation on wear behavior of coated and uncoated specimens is preluded in the first-half of the study through pin-on-disc method and the effects of the different operating attributes such as applied load of 20 to 60&#xa0;N, sliding velocity of 1 to 2&#xa0;m/s and sliding distance of 500 to 1500&#xa0;m on the wear characteristics was determined. Following the wear studies, the second-half involved potentiodynamic polarization test on corrosion in 3.5% NaCl medium at ambient temperature. Al<sub>2</sub>O<sub>3</sub> decreased wear-rate by 66.67, 33.34, 25 and 75% on bare IS2062 and Cr<sub>3</sub>C<sub>2</sub> coatings at dry sliding condition subjecting to actual load of 20 and 40&#xa0;N, respectively, due to its high hardness and protective oxide coating. Its wear rate escalated at greater sliding speeds because of high temperature on its surface. The wear-rate between 500 and 1000&#xa0;m was between 1.2 and 1.32&#xa0;mg/min which was less than that of the substrate and Cr<sub>3</sub>C<sub>2</sub> coating. Nevertheless, the friction coefficients of IS2062 + Cr<sub>2</sub>C<sub>2</sub> were lesser (0.40, 0.22 and 0.25) compared to those of IS2062 + Al<sub>2</sub>O<sub>3</sub>. Captivatingly the tribo corrosion performance is enhanced by the Cr<sub>3</sub>C<sub>2</sub> treatment on IS2062 since the retention of the carbide phase (&gt; 50%) facilitated tribo-film and passivation layer formation. The worn and corroded morphology was assessed using Scanning electron microscopy-SEM to foresee the mechanism associated on the surface of the specimen.</p>

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Wear and Corrosion Performance of Plasma Sprayed Al2O3 and Cr3C2 Coatings on IS2062

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Vijayakumar Naganna Patil,
  • S. P. Shanmuganatan,
  • M. Madhusudan,
  • Rajashekhar Hosalli

摘要

The present study implicated the wear and corrosion performance of Al2O3 and Cr3C2 coatings on IS2062. The specimens were prepared using the optimal parameters adopted by plasma spray technique. The investigation on wear behavior of coated and uncoated specimens is preluded in the first-half of the study through pin-on-disc method and the effects of the different operating attributes such as applied load of 20 to 60 N, sliding velocity of 1 to 2 m/s and sliding distance of 500 to 1500 m on the wear characteristics was determined. Following the wear studies, the second-half involved potentiodynamic polarization test on corrosion in 3.5% NaCl medium at ambient temperature. Al2O3 decreased wear-rate by 66.67, 33.34, 25 and 75% on bare IS2062 and Cr3C2 coatings at dry sliding condition subjecting to actual load of 20 and 40 N, respectively, due to its high hardness and protective oxide coating. Its wear rate escalated at greater sliding speeds because of high temperature on its surface. The wear-rate between 500 and 1000 m was between 1.2 and 1.32 mg/min which was less than that of the substrate and Cr3C2 coating. Nevertheless, the friction coefficients of IS2062 + Cr2C2 were lesser (0.40, 0.22 and 0.25) compared to those of IS2062 + Al2O3. Captivatingly the tribo corrosion performance is enhanced by the Cr3C2 treatment on IS2062 since the retention of the carbide phase (> 50%) facilitated tribo-film and passivation layer formation. The worn and corroded morphology was assessed using Scanning electron microscopy-SEM to foresee the mechanism associated on the surface of the specimen.