Electroplating of Ni/Co–pumice multilayer nanocomposite coatings: Effect of current density on crystal texture transformations and corrosion behavior
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第10期
论文作者：Mehdi Boroujerdnia Hamid Ghayour Ahmad Monshi Reza Ebrahimi-Kahrizsangi Farid Jamali-Sheini
文章页码：1299 - 1310
摘 要：The present paper aims to investigate the influence of the current density in the electroplating process on the microstructure, crystal texture transformations, and corrosion behavior of Ni/Co–pumice multilayer nanocomposite coatings. The Ni/Co–pumice composite coatings were prepared by deposition of Ni, followed by the simultaneous deposition of pumice nanoparticles(NPs) in a Co matrix via an electroplating process at various current densities. Afterward, the morphology, size, topography, and crystal texture of the obtained samples were investigated. Furthermore, electrochemical methods were used to investigate the corrosion behavior of the produced coatings in a solution of 3.5 wt% NaCl. The results indicated that increasing the plating current density changed the mechanism of coating growth from the cell state to the column state, increased the coating thickness, roughness, and texture coefficient(TC) of the Co(203) plane, and reduced the amount of pumice NPs incorporated into the Ni/Co–pumice composite. The electrochemical results also indicated that increasing the current density enhanced the corrosion resistance of the Ni/Co–pumice composite.
Mehdi Boroujerdnia1，Hamid Ghayour1，Ahmad Monshi1，Reza Ebrahimi-Kahrizsangi1，Farid Jamali-Sheini2
1. Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University2. Advanced Surface Engineering and Nano Materials Research Center, Department of Physics, Ahvaz Branch, Islamic Azad University
摘 要：The present paper aims to investigate the influence of the current density in the electroplating process on the microstructure, crystal texture transformations, and corrosion behavior of Ni/Co–pumice multilayer nanocomposite coatings. The Ni/Co–pumice composite coatings were prepared by deposition of Ni, followed by the simultaneous deposition of pumice nanoparticles(NPs) in a Co matrix via an electroplating process at various current densities. Afterward, the morphology, size, topography, and crystal texture of the obtained samples were investigated. Furthermore, electrochemical methods were used to investigate the corrosion behavior of the produced coatings in a solution of 3.5 wt% NaCl. The results indicated that increasing the plating current density changed the mechanism of coating growth from the cell state to the column state, increased the coating thickness, roughness, and texture coefficient(TC) of the Co(203) plane, and reduced the amount of pumice NPs incorporated into the Ni/Co–pumice composite. The electrochemical results also indicated that increasing the current density enhanced the corrosion resistance of the Ni/Co–pumice composite.
关键词：
