MORPHOLOGY AND PROPERTIES OF ELECTRODEPOSITED ZN-NI ALLOY COATINGS ON MILD STEEL

Authors

  • M J Rahman Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka
  • S R Sen Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka
  • M Moniruzzaman Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka
  • K M Shorowordi Institute of Appropriate Technology, Bangladesh University of Engineering and Technology, Dhaka

DOI:

https://doi.org/10.3329/jme.v40i1.3468

Keywords:

Zn-Ni alloy, electrodeposition, morphology, corrosion resistance

Abstract

Zinc-nickel alloys electrochemically deposited on mild steel under various deposition conditions were investigated. The effect of plating variables (bath composition, pH, current density) on the coating composition, morphology, corrosion property and microhardness were investigated. Modified morphology with perfect crystal growth, uniform arrangement of crystals, refinement in crystal size and hence bright deposit was obtained from sulfate Bath-3 containing 30 g/l H3BO3 at a current density of 75 mA/cm2. Corrosion resistance as well as microhardness of Zn-Ni alloy coatings increased with the increase of %Ni in the deposit for all the sulphate baths studied. Optimum conditions for good deposition are also discussed.

Keywords: Zn-Ni alloy, electrodeposition, morphology, corrosion resistance.  

doi: 10.3329/jme.v40i1.3468

Journal of Mechanical Engineering, Vol. ME40, No. 1, June 2009 9-14

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How to Cite

Rahman, M. J., Sen, S. R., Moniruzzaman, M., & Shorowordi, K. M. (2009). MORPHOLOGY AND PROPERTIES OF ELECTRODEPOSITED ZN-NI ALLOY COATINGS ON MILD STEEL. Journal of Mechanical Engineering, 40(1), 9–14. https://doi.org/10.3329/jme.v40i1.3468

Issue

Vol. 40 No. 1 (2009)

Section

Articles