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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.