Characterization and optimization of pulse electrodeposition of Ni/nano-Al2O3 composite coatings

A. Jegan, R. Venkatesan

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    A. Jegan, and R. Venkatesan, Characterization and optimization of pulse electrodeposition of Ni/nano-Al2O3 composite coatings, Int. J. Miner. Metall. Mater., 20(2013), No. 5, pp.479-485. https://dx.doi.org/10.1007/s12613-013-0754-z
    A. Jegan, and R. Venkatesan, Characterization and optimization of pulse electrodeposition of Ni/nano-Al2O3 composite coatings, Int. J. Miner. Metall. Mater., 20(2013), No. 5, pp.479-485. https://dx.doi.org/10.1007/s12613-013-0754-z
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    Characterization and optimization of pulse electrodeposition of Ni/nano-Al2O3 composite coatings

    • Department of Mechanical Engineering, Sona College of Technology, Salem, 636005, India

      通信作者:

      A. Jegan E-mail: jegmak@gmail.com

    中文摘要

    Nickel/nano-Al2O3 composite coatings produced by the pulse electrodeposition method and the influence of pulse parameters, i.e., pulse frequency, duty cycle, and current density on the microstructure, hardness, and corrosion resistance, were critically investigated on an AISI 1018 mild steel specimen electroplated in a Watt’s type bath. The experiments were carried out with different combinations of pulse parameters using Taguchi’s L27 orthogonal array, and 27 trials were conducted to study the effect of pulse parameters in view to maximize the hardness of the specimen. The assessment results clearly reveal that the specimen exhibits the maximum hardness at the pulse frequency of 20 Hz, duty cycle of 30%, and peak current density of 0.4 A/cm2, which are designated as the optimal parameters herein. Furthermore, the influences of those optimized pulse parameters over the microstructure and corrosion resistance were investigated, and some conclusions were drawn. Also, from the ANOVA examination, it is clear that duty cycle is predominant in affecting the hardness, while current density has relatively low impact.

     

    Characterization and optimization of pulse electrodeposition of Ni/nano-Al2O3 composite coatings

    Author Affilications

      • Department of Mechanical Engineering, Sona College of Technology, Salem, 636005, India

    • Received: 25 July 2012; Revised: 22 August 2012; Accepted: 20 September 2012;
    Nickel/nano-Al2O3 composite coatings produced by the pulse electrodeposition method and the influence of pulse parameters, i.e., pulse frequency, duty cycle, and current density on the microstructure, hardness, and corrosion resistance, were critically investigated on an AISI 1018 mild steel specimen electroplated in a Watt’s type bath. The experiments were carried out with different combinations of pulse parameters using Taguchi’s L27 orthogonal array, and 27 trials were conducted to study the effect of pulse parameters in view to maximize the hardness of the specimen. The assessment results clearly reveal that the specimen exhibits the maximum hardness at the pulse frequency of 20 Hz, duty cycle of 30%, and peak current density of 0.4 A/cm2, which are designated as the optimal parameters herein. Furthermore, the influences of those optimized pulse parameters over the microstructure and corrosion resistance were investigated, and some conclusions were drawn. Also, from the ANOVA examination, it is clear that duty cycle is predominant in affecting the hardness, while current density has relatively low impact.

     

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