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Autori: L. Benea, P.L. Bonora, A. Borello, S. Martelli
Editorial: Materials and Corrosion, 53(1), p.23-29, 2002.
Advances in materials’ performance often require the development of composite systems, of which coated materials are one form. The abrasion and corrosion resistance of components can be greatly increased by protective coatings and this is a growing industry of considerable economic importance. This paper aims with a comparative wear corrosion study of pure nickel and Ni-SiC nano structured composite coating. All the experiments concerning the effects of the rotation speed and the applied load on the corrosion behaviour and friction coefficient were carried out using the 0.5 M Na2SO4 neutral solution. The Ecorr values measured at different disc rotation speeds and different friction loads show some differences between the two types of coatings. For wear corrosion tests an apparatus constructed in the Electrochemistry Laboratory, Dept. of Materials Engineering of Trento University was used. A PMMA cell contained the test solution and a transmission shaft with the tested sample, in the shape of a disc (diameter 40 mm and height 18 mm), connected to an electrical motor. A moving rod held an alumina parallelepiped counterface and the imposing load system thus obtaining a sliding type wear system.
Cuvinte cheie: nanocomposite coatings, corrosion, tribocorrosion