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https://www.ias.ac.in/article/fulltext/boms/039/07/1691-1699

Pulse electrodeposition; Ni/Al$_2$O$_3$ nanocomposite coating; multilayer coatings; ultrasonic agitation.

In this study, the Ni/Al$_2$O$_3$ nanocomposite multilayer coatings with six consecutive layers were electrodeposited on the mild steel by pulse electrodeposition with ultrasound agitation from nickelWatts-type bath. Thestructure and morphology of the etched coatings cross-section were characterized by scanning electron microscopy (SEM). The corrosion behaviour of these coatings was investigated in 1 M H$_2$SO$_4$ solution. All of the coatings showed the active–passive transition and the distinct difference in structure had negative influence on their corrosion resistance. Moreover, the tribological behaviour of these coatings was evaluated by pin-on-disc type. The results showed that wear resistance increased with increase in duty cycle and frequency.

H MAJIDI¹ M ALIOFKHAZRAEI¹ A KARIMZADEH¹ A SABOUR ROUHAGHDAM¹

1. Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran 1411713116, Iran

Manuscript received

19 January 2016

Accepted

15 April 2016