Deposition Rate and Electrochemical Corrosion Behavior of Nickel-Based Composite Coatings

Authors F. Lekmine1,2 , I. Zidani3 , A. Chala2 , H. Ben Temam2

1University Abbes Laghrour, 40000 Khenchela, Algeria

2Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145RP, Biskra 07000, Algeria

3University Hadj Lakhdar, Batna-1, Algeria

Issue Volume 14, Year 2022, Number 6
Dates Received 27 July 2022; revised manuscript received 20 December 2022; published online 27 December 2022
Citation F. Lekmine, I. Zidani, A. Chala, H. Ben Temam, J. Nano- Electron. Phys. 14 No 6, 06005 (2022)
PACS Number(s) 81.65.Rv, 82.45.Bb, 62.20.Qp, 81.65.Kn
Keywords Current density (4) , Ni-P-TiO2 composite coatings, Average particle size, Corrosion resistance (2) , Microhardness (2) .

Metal corrosion control is technically, economically, environmentally and aesthetically important. The best option is to use coatings to protect metals and alloys from corrosion. Nickel plating is one of the most widely used methods for protecting less noble metal surfaces since the turn of the century. The need for improved coatings with better wear and corrosion resistance has led to the development and use of composite electrostatic deposits. In this paper, Ni-P-TiO2 composite coatings were fabricated by direct current electrodeposition on copper substrates. X-ray diffraction (XRD) analysis and energy dispersive spectroscopy (EDS) were employed to determine the average particle size of coatings elemental chemical composition. The electrochemical corrosion behavior of Ni-P-TiO2 composite coatings in 3.5 wt. % NaCl was characterized using a potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS). The results indicate that TiO2 nanoparticles are included in the coatings. The deposition rate increased with increasing current density; the microhardness of the coatings noticeably increased with current density. Corrosion tests have shown that 3 – 2 is the optimal value of the applied current density in terms of the lowest value Ecorr = – 504 mV and the best charge transfer resistance Rp = 114.7 Ω.cm2.

List of References