Ni Layer Fabrication In Various Temperature Of Watts Solution

An electrode that produces oxy-hydrogen gas (HHO) through electrolysis, commonly uses stainless steel (SS). Nickel (Ni) electrodeposition over copper (Cu) alloy promises to replace SS in the electrolyte solution for HHO production. Therefore, it needs a deep exploration of electrodeposition Ni over Cu alloy. In the present work, Ni film electrodeposition was conducted at various electrolyte solution temperatures. Watts solution was chosen due to its better performance than other plating bath compositions. The scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), X-ray diffractometer (XRD), Potentiostat, and hardness apparatus were employed to identify the characteristics of the Ni films over the Cu alloy. An increase in the solution temperature led to an increase in deposition rate, roughness, crystallite size, and transformation of nodules into pyramidal colonies. The high hardness of Ni-15 (Ni films synthesized over the Cu alloy at 15 ^◦C electrolyte solution) is attributed to its smaller crystallite size. The Ni-15 sample has 38 nm of crystallite size and 232.26 HV of hardness. A lower corrosion rate was also found in the Ni-15 sample, about 1.84×10⁻³ mmpy. Therefore, it is recommended that the Ni-15 be selected as an electrode for HHO production because of its higher hardness and lower corrosion rate.