Desenvolvimento do banho eletrolítico para eletrodeposição da liga de Ni- V.

Abstract

Problems with corrosion are common and occur in various activities, such as in chemical, petroleum, petrochemical, and others. The process of corrosion occurs on the surface of the metal and its structures under the influence of the environment. The protective layer on the other hand, are an important prevention against corrosion, particularly against atmospheric corrosion. The electrodeposition is a method widely used to generate the metal coatings. With the aim to obtain specific properties, two or more metals may be codepositados in the form of a metal alloy, properties superior to those resulting from the electrodeposition of a simple metal. Thus, the proposed study aims at optimization of the electrolytic bath for electrodeposition of the alloy Ni - V, in order to achieve greater resistance to corrosion of the alloy. We tried to optimize the concentration of the components of the alloy depending on the resistance to corrosion. The experiments were performed with the current density of 10mA/cm ² and agitation of 20rpm. The deposit of better resistance to corrosion has a potential for corrosion of -0.194 V and equal to Rp 7.435 Ohm x103. These results were obtained for lower concentrations of vanadyl sulphate and higher concentrations of nickel sulphate.