Effect of ultrasonic power on corrosion resistance and hardness of Ni-Co- Al2O3 nanocomposite coatings

X. Y. Zhou; Y. Y. Wang; H. Jin; L. J. Chen

Metalurgija (Jan 2018)

Effect of ultrasonic power on corrosion resistance and hardness of Ni-Co- Al2O3 nanocomposite coatings

X. Y. Zhou,
Y. Y. Wang,
H. Jin,
L. J. Chen

Affiliations

X. Y. Zhou: School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, China
Y. Y. Wang: School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, China
H. Jin: School of Materials Science and Engineering, Shenyang University of Technology, China; School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, China
L. J. Chen: School of Materials Science and Engineering, Shenyang University of Technology, China

Journal volume & issue: Vol. 57, no. 4
pp. 269 – 271

Abstract

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The Ni - Co - Al2O3 composite coatings were prepared by electroplating under ultrasound condition. The influence of ultrasonic power on micro hardness and corrosion resistance was investigated. Studied by Scanning Electron Microscope (SEM), Energy Disperse Spectroscopy (EDS) and X - Ray Diffraction (XRD), under the cavitation effect of ultrasound condition, the nano Al2O3 was dispersed in the coating, and the composite coatings had refiner grains. The surface morphology of coating was uniform and compact. With the increasing of ultrasonic power, the micro hardness of Ni - Co - Al2O3 composite coatings increased first and then decreased. When ultrasonic power was 240W, the composite coatings has the highest hardness and the best the corrosion resistance.

Published in Metalurgija

ISSN: 0543-5846 (Print); 1334-2576 (Online)
Publisher: Croatian Metallurgical Society
Country of publisher: Croatia
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://pubweb.carnet.hr/metalurg/journal-metalurgija-2/about-journal

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