| Autor: |
Sergey Grigoriev, Nikita Peretyagin, Andrey Apelfeld, Anton Smirnov, Alevtina Rybkina, Ekaterina Kameneva, Artem Zheltukhin, Mikhail Gerasimov, Marina Volosova, Oleg Yanushevich, Natella Krikheli, Pavel Peretyagin |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Composites Science, Vol 7, Iss 4, p 142 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2504-477X |
| DOI: |
10.3390/jcs7040142 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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