Influence of temperature and potential range on Zn-Ni deposition properties formed by cyclic voltammetry electrodeposition in chloride bath solution

Abstract

This paper describes the study of electrodeposition process by cyclic voltammetry for Zn-Ni bimetallic coating on the X52 carbon steel substrate. Prior to the deposition at the bath temperatures of 25°C, 40°C, and 60°C, investigations were carried out to find the optimum potential range for zinc-nickel coatings with respect to the Ag/AgCl reference electrode. Scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX) was used for surface morphology and elemental composition studies. The corrosion rate of the deposits was studied using the linear polarization resistance (LPR) method by immersing the samples (with and without coating) into 3.5% NaCl solution for 24 h. SEM and EDX results showed that the bath temperature has affected the formation of the microstructures and composition of coating. In addition, micro-cracks, nickel content, mobility of ions and compactness of microstructure increased by raising the bath temperature used for electrodeposition. The corrosion rate obtained from the LPR method can be correlated with the SEM/EDX analysis. The coating deposited at the temperature of 60°C including more content of nickel and micro-cracks led to lower corrosion resistance compared to the coating deposited at the bath solution temperatures of 25°C, 40°C, and non-coated X52 steel. Based on the results, the Zn-Ni coating deposited on the X52 steel substrate in the bath solution at 40°C presented the best performance due to more suitable achievements of microstructure compaction, composition, microcracks, and corrosion resistance observations.

Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO2to SYNGAS

“…The corrosion resistance of deposited Zn-Ni coatings on steel substrate indicated as having the acceptable corrosion property (corrosion rate: ~ 11 mm/year) was reached for Zn-Ni alloys in the range from 12 to 15 wt.% of Ni content in the coating so that the coating with Ni content from 12 to 15 wt.% maintains the anodic behavior of the steel, retaining the sacrificial behavior with a decrease corrosion rate after the addition of Ni, which increases the potential nearer to the substrate providing protection for a too time [21]. This has been endorsed by reports conducted by other authors [22][23][24][25] who have stated that Zn-Ni coating with a Ni amount of 12 to 15 wt.% supplies adequate corrosion protection. While the coating retains its sacrificial behavior regarding the steel substrate, whenever the alloy with more than 30 wt.% of Ni turns nobler than the substrate, missing its sacrificial behavior.…”

“…In recent years, a lot of research has been performed to investigate the possibility that the Zn-Ni alloy could be a substitute with a corrosion property corresponding to the toxic coatings of cadmium. Much research has also been done to distinguish and determine the corrosion resistance of the Zn-Ni coatings [22][23][24][25]. The corrosion resistance of deposited Zn-Ni coatings on steel substrate indicated as having the acceptable corrosion property (corrosion rate: ~ 11 mm/year) was reached for Zn-Ni alloys in the range from 12 to 15 wt.% of Ni content in the coating so that the coating with Ni content from 12 to 15 wt.% maintains the anodic behavior of the steel, retaining the sacrificial behavior with a decrease corrosion rate after the addition of Ni, which increases the potential nearer to the substrate providing protection for a too time [21].…”

Investigation of Electrochemical Parameters on Cost-Effective Zn/Ni-Based Electrocatalysts for Electrochemical CO2 Reduction Reaction to SYNGAS(H2+CO)

“…The presence of micro-cracks, compactness, uniformity, surface morphologies, and the percentage compositions in the deposited alloy was analyzed through SEM, EDX and corrosion measurement through LPR. 27,28 This section presents the results and discussions on the influence of deposition temperature (morphology) on the electrochemical CO 2 RR of electrodeposited zinc-nickel alloy electrocatalysts.…”

“…All solutions were prepared using distilled water. 5,27,28 The zinc-nickel coatings were deposited by chronopotentiometry method at different pHs and temperatures as can be seen in Table SII. Then, Zn-Ni coatings were investigated for microstructure, the formation of micro-cracks and coating composition, by SEM/EDX analysis, and corrosion resistance of LPR, by Autolab potentiostat, before CO 2 RR to obtain the coating with the best performance.…”

Effect of temperature on electronucleation and growth mechanism of Zn–Ni alloy in deep eutectic solvent

“…The traditional electrodeposition of Zn–Ni alloys is usually carried out in an aqueous solution. At present, the electrodeposition of Zn–Ni alloy coatings in aqueous solution is a mature technology that is widely used in industrial production (Bahadormanesh et al , 2017; Beheshti et al , 2020. Shekhanov et al , 2020; Abou-Krisha, 2005; Farooq et al , 2022; Roventi et al , 2015; Jia et al , 2022).…”