Study of the Corrosion Resistance Properties of Ni–P and Ni–P–C Nanocomposite Coatings in 3.5 wt % NaCl Solution


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The present paper aims to compare the corrosion protection performance of electrodeposited Ni‒P with Ni–P–C nanocomposite coatings in 3.5 wt % NaCl solution in order to assess the influence of carbon nanoparticles on corrosion behavior of these coatings, by the potentiodynamic polarisation Tafel curves and electrochemical impedance spectroscopic (EIS) techniques. The effect of heat treatment on the coatings performance was also studied. The results revealed that heat treated Ni–P–C nanocomposite coating in air at 673 K significantly improved resistance to corrosion compared with Ni–P coatings. This behavior was related to incorporation of carbon nanoparticles into Ni–P matrix using in-situ electrochemical reduction of L-lysine, which shift the corrosion potential (Ecorr) positively, also the corrosion current density (Icorr) and the double layer capacitance (Cdl) values decrease, the charge transfer resistance (Rct) and efficiencies of inhibition (IE, %) increase, indicating improvement in the corrosion resistance in seawater environment. Microstructure, phase change and chemical composition of the prepared coatings were studied using scanning electron microscopy (SEM), X-ray diffraction (XRD) and elemental microanalysis (EDX), respectively.

作者简介

Ramin Badrnezhad

Department of Chemistry and Chemical Engineering

Email: h.pourfarzad2030@gmail.com
伊朗伊斯兰共和国, Tehran, 15875-1774

Hamed Pourfarzad

Center of Excellence in Electrochemistry, Faculty of Chemistry

编辑信件的主要联系方式.
Email: h.pourfarzad2030@gmail.com
伊朗伊斯兰共和国, Tehran, 14155-6455

Ali Madram

Endocrinology and Metabolism Research Center

Email: h.pourfarzad2030@gmail.com
伊朗伊斯兰共和国, Tehran, 14155-6455

Mohammad Ganjali

Center of Excellence in Electrochemistry, Faculty of Chemistry; Endocrinology and Metabolism Research Center

Email: h.pourfarzad2030@gmail.com
伊朗伊斯兰共和国, Tehran, 14155-6455; Tehran, 14155-6455

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