B. Szeptycka, J. Senatorski INFLUENCE OF THE SURFACE ACTIVE AGENT ON TRIBOLOGICAL PROPERTIES OF Ni-PTFE AND Ni-SiC THE ELECTROPLATED NANOCOMPOSITE COATINGS This paper present a result of tribological investigations of the electroplated nanocomposite coatings Ni-SiC and NiPTFE deposited on the steel surface. <...> Siemens The microhardness of the deposited layers was measured using a Vickers’ method at a load of 0.01 kG. The surface-active agents used in the bath influenced on the content of particles in coatings. <...> Roughness of the composite coatings was small, and it was connected with content of dispersion particles in layer. <...> Such examinated layers were annealed at 523 K and all layers were subjected to the tribological tests which were carried out with the use of Amsler machine. <...> The results of this experiments, i.e. wear resistance and coefficient of friction, show very positve effect of application nanostructural electroplated coatings for steel surface treatment. <...> Strengthening the nanocrystalline nickel matrix with ceramic and polymer particles gave a positive effect in the form of high wear resistance but the annealing have varied influence. <...> INTRODUCTION Electrodeposition of nanocomposite nickel may be carried out in conditions of direct current [1] as well as with the application of pulse current [2]. <...> Nickel forms compounds with various elements, thus enhancing the properties of are formed and these are stable at even higher temperatures. <...> At elevated temperatures, compounds of the Nix the coating. <...> As an example, one can My type bath containing the brightening agents allowed the obtaining of nanocomposite coatings with the wear resistance enhanced in comparison with a nickel coating [3,4]. <...> Liang that electrodeposited composite coatings exhibit better resistance to elevated temperatures than metal coatings without dispersed particles. <...> However, above 573 K the microhardness of such coatings is reduced dramatically. <...> Taking into account the above information, the temperature of 523 K was decided as that at which the nanocrystalline structure of the nickel matrix still exists, PTFE particles should still not be subjected to degradation and the microhardness of composite coatings should not drop significantly. 2. <...> As surfactants, the following media (WFA), .7H2 O, 0.3 M NiCl2 .6H2 Проблемы машиностроения и автоматизации, № 4 – 2007 cationic high-fluorine O surfactant (WFK1) and amphoteric high-fluorine <...>