الطلاء الكهربائي لل Co,Zn وسبيكتهما من السوائل الأيونية اليوتكتيكية (DES)

Electrodeposition of Zn,Co and their alloys from deep eutectic solvents (DES)

In the presence of varying quantities of water and additives, Zn -Co alloy coatings were electrodeposited on mild steel in a choline chloride (ChCl) :ethylene glycol (EG) based liquid.The conductivities of Zn ,Co , and Zn- Co electrolytes were found to improve through enhancing volumes of water, while conductivities of plating solution decreased as a result of using boric acid and nicotinic acid. The speciation of Co in a Zn -Co electrolyte was investigated using UV-visible spectroscopy. A blue shift in the Co species was detected when water was added to Zn -Co solutions. However no change was observed in the spectra of Co species when additives were introduced to the plating bath. The cyclic voltammetry was used to examine the redox potential of the plating solutions, from which it was found that when water was added to Zn ,Co, and Zn-Co electrolytes. The redox current peaks of Zn, Co and Zn -Co increased with increasing amount of water, while intensities of deposition peak were decreased when the boric acid, nicotinic acid and ascorbic acid added to the metals electrolytes. The morphologies of films were studied by using scanning electron microscopy (SEM). Improving in homogeneous the morphologies of the deposited Zn, Co and Zn-Co films was found with enhancing the amount of water and boric acid. Zn-Co coatings produced from the electrolyte with water had 19.83 wt% Zn and 80.13 wt% Co, according to the results. When the Zn- Co film was deposited in a bath containing 20% water, the roughness of the deposit was reduced to roughly 7.642 nm. To analyze the XRD pattern of the Zn -Codeposits, researchers used the X-ray Diffraction (XRD) technique