The platelet specimens of st.3 were processed in the installation for laser assisted evaporation and epitaxial consisting of ultrahigh vacuum chamber and a powerful pulsed Nd3+ laser. The specimens and targets of evaporated material were mounted on a special holder at working vacuum nearly 10-6 Pa. The target was evaporated by laser pulses (1.06 mm wavelength, 35 ns duration, 0.3 Hz repetition rate) introduced through a transparent window and focused on the target with the help of an optical system; the density power in the local spot was 108-109 W/cm2. At this power density v value in the focal spot the vapor-plasma clusters of evaporated target material consist of high energy (up to 1 Kev) neutral as well ionized particles. Such ions and atoms partly condense on the surface of a substrate, but more energetic of them can penetrate into the substrate. As a result of this process there is sufficient surface modification which leads to a change of its strength and corrosion characteristics. The 0.1 mcm thick layers of Mo and W on previously polished surface of st. 3 specimen have been obtained during the above mentioned processing. In order to improve adhesion between deposited layer and substrate the latter was heated up to 200 0C during the laser-plasma processing. The specimens having the above mentioned surface covering underwent wear and break examination. The investigation were fulfilled according to the known test "plate-ring" with the help of the friction apparatus УMT-1. As the counterbody was a brush prepared from steel of the У8 (hrb 90-95) mark. The wear and tear resistivity was determined at the 1.0 Mpa load and 100 rotation/min velocity of the counterbody. We have used the И20 industrial oil as the lubricant each tasting was grinded la during 3-5 hours in the regime of boundary lubricant. The value of the wear and tear was determined at the arriving of the friction coefficient stability. The whole wear was determined through each 3 hours by weighting the specimen with the help of analytic balance. These results are shown into Table 1.tableTable 1. Specific friction powerThe tests show that the wear resistivity of the obtained coverings on steel is sufficiently greater than that for unprocessed steel specimens. We determined that the increased wear resistivity of the Mo covering comparing with the W one was the result of a good adhesion of Mo with steel surface. Studding the surface of specimens after work in steady-state friction conditions we have shown that wear and tear of the W covering can be characterized as some kind of elastic contactment. Study of the corrosion of obtained covering was fulfilled in various aggressive media (acidulous, neutral and alkaline). We showed the corrosion covering for the continuous coverings were the same as for pure Mo and W. For instance, the corrosion velocities in 48 v. of H2SO4 are 1.2 and 1.28 gr/m2·h for Mo and 0.3 and 0.35 gr/m2·h for W (pure metal and the covering on steel respectively).