| Autor: |
Grigoriev, Sergey, Peretyagin, Nikita, Apelfeld, Andrey, Smirnov, Anton, Rybkina, Alevtina, Kameneva, Ekaterina, Zheltukhin, Artem, Gerasimov, Mikhail, Volosova, Marina, Yanushevich, Oleg, Krikheli, Natella, Peretyagin, Pavel |
| Předmět: |
|
| Zdroj: |
Journal of Composites Science; Apr2023, Vol. 7 Issue 4, p142, 15p |
| Abstrakt: |
Coatings with a thickness from ~40 to ~50 µm on Ti6Al4V titanium alloy were formed by micro-arc oxidation in a silicate-hypophosphite electrolyte with additions of graphene oxide. Micro-arc oxidation treatment was carried out in the anode–cathode mode (50 Hz) with a ratio of anode to cathode currents of 1:1, a total density of 20 A/dm2, and a treatment duration of 30 min. The effect of the graphene oxide concentration in electrolytes on the thickness, roughness, hardness, surface morphology, structure, composition of micro-arc oxidation coatings, and its electrochemical corrosion behavior in 3.5% NaCl solution was studied. The input of graphene oxide additives into the base silicate hypophosphite electrolyte led to an increase in the hardness of micro-arc oxidation coatings. Electrochemical polarization studies and impedance data showed that the best characteristics in terms of corrosion-protective ability among coatings formed in electrolytes with graphene oxide additives were those formed in the electrolyte with a graphene oxide concentration of 0.1 g·L−l. A further increase in the graphene oxide concentration in the electrolyte did not improve the protective properties of micro-arc oxidation coatings. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
