Page 11 - Дисертація_Сободош_Наталія_Йосипівна

11

mechanical destruction of protective films, which mimic the real operating

conditions of friction units. It has been established that the presence of the developed

inhibitor in a corrosive environment significantly accelerates repassivation

processes: the time required for the electrode potential to return to stable values is

shorter than in an uninhibited chloride-containing solution, indicating the high

reactivity of the composition’s components toward interaction with the freshly

exposed metal surface.

The mechanism of protective action, based on the formation of a stable

adsorption-phase organo-inorganic film, has been scientifically substantiated. It has

been demonstrated that the film forms at an optimal composition concentration of 1

g/l and a component ratio of 1:1, as evidenced by faster restoration of the electrode

potential and a significant reduction in the corrosion current density on the freshly

formed mechanically activated surface compared to the uninhibited medium.

Electrochemical studies have confirmed that the corrosion current density on the

mechanically activated surface decreases by several orders of magnitude, ensuring

that the metal remains in a passive state even under intense tribochemical stress.
The results of tribocorrosion tests show that the developed composition

effectively inhibits the electrochemical component of wear. The stability of the
electrode potential throughout the entire reciprocating motion cycle, along with a

threefold reduction in the polarization current, indicates intensive self-regeneration
of the protective layer directly in the contact zone. A significant improvement in the

anti-friction characteristics of the D16T alloy has been established: the use of the

inhibitor reduces the coefficient of friction by almost half compared to operation in

an environment without an inhibitor, where a natural oxide layer predominates.

Using a combination of physical methods (scanning electron microscopy and

optical profilometry), a qualitative change in surface morphology was detected after

the tests. A reduction in the wear track width and a decrease in its roughness

parameters were observed, confirming the increased mechanical stability of the

formed film. A synergistic effect has been demonstrated, combining the high

inhibitory properties of aluminum and zinc alginate complexes with their ability to