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 hydrogenation of niobium to a concentration of more than 10 at. % leads to

the strengthening of the surface layer and, accordingly, increase its wear resistance by ~ 4
times.
 hydrogenation of zirconium to a concentration of ~ 5 at. % reduces its wear
resistance by 20….40%. In the presence of hydrogen in the surface layers, a hydride phase
is formed, which serves as a solid lubricant and increases the wear resistance of zirconium
both after and during the hydrogenation process.
It was found that galvanic composite coatings Ni-P and Ni-B after heat treatment
reduce wear of steel 17Mn1Si in 2-5 times in a hydrogen environment and wear of
aluminum alloy Д16T in a chloride-containing environment in ~ 7 times. It has been
shown for the first time that the combined action of hydrogenation and friction accelerates
diffusion processes in an amorphous Nickel-phosphorus coating, which promotes the
formation of a reinforcing phase of Ni 3P in the surface layers, which increases its wear
resistance.
It is shown that the high corrosion resistance and hardness of the coatings deposited
by the plasma powder method do not determine their corrosion-mechanical wear
resistance. The corrosion resistance of coatings based on iron, nickel and iron-nickel
increases in corrosive environments with increasing pH, increases, but their tribocorrosion
resistance decreases by 25-30%, which is determined by the nature of secondary structures
in the friction zone.
It was found that the addition of graphite (2-4%) to the BH20 composite increases its
tribotechnical characteristics during dry friction, reduces its corrosion and tribocorrosion
resistance by 2-2.5 times. The modification of the Nickel matrix of BH20 composite by
chromium carbides (1% Cr 3C 2) decreases the corrosion rate in 3% NaCl solution and the
corrosion-mechanical wear by 10-12%. It is shown that the corrosion resistance of this
alloy increases with increasing pH of the solution from 2.5 to 9.9 , and the tribocorrosion
resistance increases 2-3 times.
It is shown that the chromates, which are effective corrosion inhibitors, accelerate
tribocorrosion of the aluminum alloy by ~ 40% due to the formation of conversion films.
Instead, zinc phosphates increase the corrosion and wear resistance of D16T aluminum
alloy by ~30% due to the formation of plastic secondary structures. The rate of formation
these structures depends on the mechanical and electrochemical factors.
It was found that the addition of silver and phosphate nanoparticles to aqueous
environments and lubricants increases the tribological and tribocorrosion behavior in
friction pairs of steel 20 – steel ШХ15 by ~ 35%. The composition of lubricants with the
addition of nanoparticles is proposed, which is used in the nodes of drill bits and reduce
their wear.
The results of the work have been implemented in the enterprises of Ukraine, in
particular at PAE "Konotop Rebar Plant", LLC "Universal Drilling Equipment" and the
state research and production enterprise "Alcon-Tverdosplav".

Кey words: tribocorrosion, corrosion resistance, potential, polarization current,
friction, wear, secondary structures, structure, hydrogen, coating polarization, inhibitors,
nanoparticles, hard alloys.