Electrochemical Behavior Of Nickel Aluminide Based Alloy Deposited Using Deep Eutectic Solvent

Nazeri, Muhammad Zulhilmi (2020) Electrochemical Behavior Of Nickel Aluminide Based Alloy Deposited Using Deep Eutectic Solvent. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The experimental study of the utilize of deep eutectic solvent as an electrolytic solution in the electrodeposition of Nickel Aluminide based alloy on Fe substrate is canied out due to the formation of binary alloy in deep eutectic solvent has not fully studied. The purpose of this study is to form a coating of Nickel Aluminide based alloy on Fe substrate by using electrodeposition in deep eutectic solvent as a function of current density. First, the substrate is polished using 1000 grit sandpaper. Next, the substrate degreased, rinsed using ethanol and distilled water respectively. Then, the substrate were mounted by epoxy resin. Later, 3 samples was electrodeposited with current density of 0.010, 0.013 and 0.015A/cm 2 with p lating time from 1800 seconds. The plating bath consists of 0.1 M NiCli and 0.1 M Al Ch were mixed homogenously with ChCI: EG solution with molar ratio 1 :2. For the analysis, Optical Microscope (OM) and X-ray Diffraction (XRD) were used to determine the surface morphology and element composition of the coated substrate. From OM analysis, the sample were observed on the surface and considered to be Ni3Al on the substrate. For XRD analysis, the peak of Ni has seen together with Fe element at cmTent density 0.013 A/cm2. However, the element of Al is less compared to Ni. Then, hardness and surface roughness of the coated samples were determined by Micro Vickers hardness tester and Profilometer respectivel y. As result, the surface roughness is from 0.45 μm to 1.82 μm and the hardness is from 900 N /mm2 to 1060 N/ mm2. Lastly, electrochemical measurement were performed in 3.5 wt. % NaCl to investigate the corrosion behaviour of the coated samples. The coating value Icorr is 0.13 rnA and Ecorr is 0.92 V. The corrosion behaviour for coating substrate have lower corrosion potential compared to uncoated Fe substrate

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