MICROSTRUCTURE AND PROPERTIES OF THE Ni–B AND Ni–B–Ce ULTRASONIC-ASSISTED ELECTROLESS COATINGS

Wei Qian (), Haotian Chen (), Chenqi Feng (), Liying Zhu (), Huanming Wei (), Sheng Han (), Guisheng Li (), Hualin Lin and Jibo Jiang
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Wei Qian: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Haotian Chen: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Chenqi Feng: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Liying Zhu: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Huanming Wei: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Sheng Han: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Guisheng Li: #x2020;College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, P. R. China
Hualin Lin: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
Jibo Jiang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China

Surface Review and Letters (SRL), 2018, vol. 25, issue 06, 1-11

Abstract: We successfully obtained Ni–B and Ni–B–Ce coatings with and without sonication on low-carbon steel (Q235) through electroless plating with the deposition time of 60min. The surface morphology and elemental composition of the coatings were evaluated by scanning electron microscopy (SEM) and inductively coupled plasma (ICP). The 11μm thick sonicated Ni–B–Ce (Son-Ni–B–Ce) coating is uniform with the composition of Ni 87.1%, B 6.2% and Ce 6.6%. X-ray diffraction (XRD) measurements implied a typical broaden peak around 44∘, considered as amorphous structure which was confirmed by selected area electron diffraction pattern (SAED). Atomic force microscopy (AFM) showed a typical circular pit of Ni–B–Ce coating and Son-Ni–B–Ce coating. X-ray photoelectron spectroscopy (XPS) revealed the chemical status of coating components. The mechanical and corrosion resistance properties were determined by Vickers hardness tester, potentiodynamic polarization (Tafel) and electrochemical impedance spectroscopy (EIS) in 3.5wt. % NaCl solution. As a result, the Son-Ni–B–Ce coating revealed the optimum hardness (956HV), minimum roughness Ra (92.38nm) and excellent corrosion resistance (3.65μAcm−2) among all coatings.

Keywords: Electroless; ultrasonic; cerium; amorphous; corrosion (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X19500069

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