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NANO-COMPOSITION TI-CO(MN) COATINGS INVESTIGATION
Abstract
The structure and the properties of the oxide nano-composition coatings formed on titanium in the diphosphate based electrolytes by means of plasma electrolytic oxidation in the spark-discharge regime at application of interelectrode voltage 100 to 130 V have been studied. The possibility to obtain the oxide layers containing the alloying elements by the modification of the composition of electrolytes has been stated. The chemical and phase composition as well as the topography, the microstructure and the grain size of the formed layers depend on the electrolyte composition, applied current density and interelectrode voltage. The effect of chemical composition formed mixed oxide nanocomposition coatings on the corrosion resistance and catalytic activity has beendiscussed. The oxide layers containing the alloying elements might be formed on Ti by means of the anodic polarization in the spark-discharge regime (interelectrode voltage 100 to 130 V). The chemical and phase composition as well as the topography, the microstructure and the grain size of the formed layers can be varied by the altering the applied voltage and by the modification of the electrolytes. The high corrosion resistance of mixed oxide systems in alkaline and in Ringer solutions has been estimated. The possibility to obtain the layers of exhibiting the structure and properties promising for the bio-application has been stated. Mixed oxide coatings are characterized by the developed surface and high catalytic activity in the carbon (II) oxide conversion reaction.
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