Effect of electrodeposition current density and sodium dodecyl sulphate surfactant (SDS) on the properties of nickel-recycled quarry dust composite coatings

Abdul Asmin, Muhammad Aslam (2024) Effect of electrodeposition current density and sodium dodecyl sulphate surfactant (SDS) on the properties of nickel-recycled quarry dust composite coatings. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This study conducted an experimental investigation into the influence of electrodeposition current density and the presence of sodium dodecyl sulphate (SDS) on the properties of nickel-recycled quarry dust (Ni-QD) composite coatings. The objective of this experiment is to investigate the effect of various current density and SDS content on the morphology, hardness and wear of the Ni-QD composite coatings. Mild steel was chosen as the substrate due to its susceptibility to wear, corrosion, and low hardness. The electrodeposition process was carried in nickel Watt’s electrolyte at the temperature of 40°C and the current density in the range between 1 A/dm2 to 9 A/dm2. SDS which act as surfactant was added to the nickel Watt’s electrolyte at 0, 0.25, 0.50, 0.75 and 1.0 g/L concentration. The coating was characterized by using scanning electron microscope (SEM) and X-ray diffraction (XRD). The hardness properties and wear behaviour of the coating were examine using micro-Vickers machine and pin on disc machine. As a result, an increase in SDS content (0.75 g/L) has a considerable effect on coating morphology at lower current densities (3 A/dm2), favouring a more uniform and compact structure. Higher current densities (9 A/dm2) applied cause to increase of the surface roughness and porosity, affecting the mechanical properties of the coatings. Furthermore, the incorporation of recovered quarry dust into composite coatings shows promise improvements in particular properties. Implying a possible sustainability and cost-effectiveness in coating applications. These results underscore the vital importance of electrodeposition current density and surfactant additives in customizing the characteristics and properties of Ni-QD composite coatings. This insight opens avenues for optimizing their utilization in industrial applications, particularly in areas such as corrosion protection and wear resistance.

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