• Influence of electrodeposition parameters on the characteristics of Mn–Co coatings on Crofer 22 APU ferritic stainless steel

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    • Keywords


      Electrodeposition; manganese; cobalt; coating; current efficiency.

    • Abstract


      Manganese–cobalt coatings are promising candidates for solid oxide fuel cell (SOFC) interconnection applications because of their high conductivity and good oxidation resistance. In the present study, manganese and cobalt are electrodeposited onCrofer 22APU ferritic stainless steel. The effects of current density, pH, sodium gluconate (NaC$_6$H$_{11}$O$_7$)concentration, cobalt sulphate concentration (CoSO$_4$·7H$_2$O) and deposition duration on the microstructure and cathodic efficiency are characterized by means of scanning electron microscopy, weight gain measurements and energy-dispersive X-ray spectrometry, respectively. Results show that increases in current density and deposition duration lead to decrease in current efficiency and deposition rate. Increasing the pH to 2.5 causes an initial rise of current efficiency and depositionrate, followed by subsequent decline. In addition, the increases in sodium gluconate and cobalt sulphate concentrations inthe electrolyte solution result in an increase in current efficiency and deposition rate. Moreover, the results demonstratethat the variations in the current density, pH, sodium gluconate (NaC$_6$H$_{11}$O$_7$) concentration, cobalt sulphate concentration (CoSO$_4$·7H$_2$O) and duration have a significant effect on grain size, uniformity and the adherence of the coating.

    • Author Affiliations



      1. Department of Metallurgy and Materials Science, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman 76169133, Iran
    • Dates

  • Bulletin of Materials Science | News

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