Corrosion and wear behaviour of multilayer pulse electrodeposited Ni–Al₂O₃ nanocomposite coatings assisted with ultrasound

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• 作者：H MAJIDI ; M ALIOFKHAZRAEI ; A KARIMZADEH…
• 关键词：Pulse electrodeposition ; Ni–Al2O3 nanocomposite coating ; multilayer coatings ; ultrasonic agitation
• 刊名：Bulletin of Materials Science
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：39
• 期：7
• 页码：1691-1699
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science, general; Engineering, general;
• 出版者：Indian Academy of Sciences
• ISSN：0973-7669
• 卷排序：39

文摘

In this study, the Ni–Al₂O₃ nanocomposite multilayer coatings with six consecutive layers were electrodeposited on the mild steel by pulse electrodeposition with ultrasound agitation from nickel Watts-type bath. The structure 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 H₂SO₄ 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.