• Surface morphology and corrosion resistance of electrodeposited composite coatings containing polyethylene or polythiophene in Ni–Mo base

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      https://www.ias.ac.in/article/fulltext/boms/034/04/0993-0996

    • Keywords

       

      Ni–Mo + PTh composite coatings; Ni–Mo + PE composite coatings; Ni–Mo coatings; corrosion resistance.

    • Abstract

       

      Ni–Mo + PENi and Ni–Mo + PTh composite coatings have been prepared by nickel-molybdenum deposition from a bath containing a suspension of PENi or Th. These coatings were obtained at galvanostatic conditions, at a current density of 𝑗dep = – 0.100 A cm-2 and temperature of 293 K. A scanning electron microscope was used for surface morphology characterization of the coatings. The chemical composition of the coatings was determined by EDS. Electrochemical corrosion resistance investigations were carried out in 5 M KOH, using potentiodynamic and electrochemical impedance spectroscopy (EIS) methods. On the basis of these investigations it was found, that the composite coatings containing thiophene are more corrosion resistant in alkaline solution than the Ni–Mo + PENi coatings. This is caused by presence of the polymer on the coatings surface and decrease of corrosion active surface area of the coatings.

    • Author Affiliations

       

      J Niedbała1

      1. Institute of Materials Science, University of Silesia, 40-007 Katowice, ul. Bankowa 12, Poland
    • Dates

       
  • Bulletin of Materials Science | News

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