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    • Keywords


      Atmospheric corrosion; nickel–cobalt coating; polarization curve.

    • Abstract


      In this study, the corrosion behaviour of Ni-Co alloys with low Co content, electroplated on steel substrate in sulphate bath, was investigated. The morphology of coatings was studied by optical and SEM microscopy. The corrosion products were analyzed using EDX. The results showed that Ni–1% Co coatings had a better corrosion resistance 0.30, 0.92 and 3.75 mpy for atmospheric, salt spray and polarization tests, respectively. These are 0.41, 1.20 and 5.40 mpy for pure nickel coatings that indicate the least corrosion resistance. Surface analysis revealed the presence of oxides, sulphides and chlorides in corrosion products.

    • Author Affiliations


      Kourosh Sharifi1 Mohammad Ghorbani2

      1. Science and Engineering Department, Sharif University of Technology, Kish Island, P.O. Box: 79417-76655, Iran
      2. Department of Material Science and Engineering, Sharif University of Technology, Azadi Ave, Tehran, P.O. Box: 11155-9466, Iran
    • Dates

  • Bulletin of Materials Science | News

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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