Smyrnova A. Improvement of the titanium alloy ОТ4-0 technology oxide formation

Object of study: the electrochemical synthesis processes the of complex oxide systems containing W, Mo, V, Ce, Zr, Cu compounds on titanium alloy ОТ4-0. Aim of the study: the technology improving the electrochemical synthesis processes on titanium alloy ОТ4-0 of the catalytic and protective oxide coatings by modifying the oxide layers cerium , zirconium, molybdenum and copper compounds. Methods: linear voltammetry, scanning electron microscopy, X-ray fluorescence and X-ray phase analysis, electrochemical impedance spectroscopy, catalytic tests in the model reaction of CO conversion and benzene reactions. Theoretical and practical results: the technological of micro-arc oxidation of titanium alloy OT4-0 proposed that provides a one-step formation of the cerium-, zirconium oxide and copper containing compositions, which are characterized by a high catalytic activity and low temperature CO shift reaction. The electrolytes and oxidation modes designed , which allow to obtain a titanium alloy coating OT4-0 stable at 700 ° C. Scientific novelty: the cerium-, zirconium- and copper containing oxide compositions are synthesized by micro-arc oxidation of titanium alloy OT4-0 in acid sulphate electrolytes with high adhesion to the substrate surface area and porosity. It is found that the reaction temperature CO oxidation in the presence of the oxide compositions Ti / TiOx / CeOy / ZrOz / CuOn on the titanium alloy OT4-0 formed reduced to 140 ° C, due to the presence of copper and zirconium. The molybdenum and zirconium oxide coatings obtained by oxidation of the titanium alloy to a voltage OT4-0 60 have high electrical resistance and temperature resistance to 700 ° C it determined. Degree of implementation: the cerium-containing oxide compositions materials used in catalyst construction for cleaning the combustion products of diesel fuel produced by "Ukrspetseko" (Kharkov). Application area: chemistry industry, production of catalytic materials for chemical transformations, cleaning of gas emissions, municipal engineering; electrochemical production technology; at the research institutes and educational process.