Structural, Mechanical and Corrosion Behavior of Ni-P-TiO2 Composite Coatings: Effect of Current Density

Authors F. Lekmine1,2 , M. Naoun3, A. Gana1, H. Ben Temam1

1Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria

2ABBES Laghrour Khenchela University, Algeria

3Corrosion Laboratory, Mechanical Department, Batna2 University, Batna 05000, Algeria

Issue Volume 14, Year 2022, Number 1
Dates Received 05 December 2021; revised manuscript received 22 February 2022; published online 28 February 2022
Citation F. Lekmine, M. Naoun, A. Gana, H. Ben Temam, J. Nano- Electron. Phys. 14 No 1, 01009 (2022)
PACS Number(s) 68.37. – d, 68.37. – Ps, 81.65. – b, 81.65. – Cf
Keywords Current density (4) , Ni-P-TiO2 composite coatings, Corrosion resistance (2) , Microhardness (2) , XRD (80) .

Ni-P-TiO2 composite coatings are important in engineering due to their properties such as good resistance to wear and corrosion, magnetic properties, electrical and thermal conductivity. In this paper, the effect of current density on electrodeposited Ni-P-TiO2 composite coatings was investigated for the first time. Ni-P-TiO2 composite coatings were deposited with applied current densities (1, 3, 5, 7 and 9 A·dm – 2) on copper substrates. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and microhardness analysis were used to study the morphological, microstructural and mechanical properties. On the other hand, the corrosion performance of the coatings was evaluated using Tafel polarization and electrochemical impedance spectroscopy (EIS). XRD results indicate that the inclusion of TiO2 nanoparticles into the coatings alters the relative intensity of Ni peak as well as peak breadth. In addition, microhardness of the coatings noticeably increased with current densities. Ni-P-TiO2 composite coating electrodeposited at 3 A·dm – 2 exhibits the best microhardness and corrosion resistance.

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