Abstract
	The effects of combined damage processes of friction and corrosion on metallic materials were studied by tribocorrosion tests. A pin-on-disk type apparatus modified to corrosion environment was used for these tests. The study was focused especially on the influence of friction on corrosion and passivation reactions in the anodic region. An austeno-ferritic duplex stainless steel was used for the tests. Hardening of surface was determined by measuring the micro-hardness in a friction trace as a result of wear. It was found that hardening of the surface, caused by the friction, does not significantly influence the surface reactivity of the metallic material. Acceleration of corrosion dissolution by destruction of the surface layers by friction was observed as another result. Concurrently, it was experimentally proved that presence of these corrosion and passivation layers influences the friction conditions, particularly values of friction coefficients. The results show that there is a need of precise description of the following characteristics: electrochemical parameters, mechanical contact and structural properties of materials at the point of friction, as well as interactions (galvanic cells, potential and current distributions) between different locations on the surface of metal.