Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8
The study determined the kinetics of the selective anodic dissolution of the copper-zinc intermetallic compound Cu5Zn8 (gamma-phase) in an acetate buffer solution. Microscopic and X-ray analysis methods demonstrated the selective nature of the corrosive dissolution of Cu5Zn8. The dissolution results...
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| Format: | Article |
| Language: | English |
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Voronezh State University
2020-10-01
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| Series: | Конденсированные среды и межфазные границы |
| Subjects: | |
| Online Access: | https://journals.vsu.ru/kcmf/article/view/2965 |
| _version_ | 1819265019569766400 |
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| author | Oleg A. Kozaderov Dmitrii M. Taranov Aleksander N. Krivoslykov Sofia V. Borodkina |
| author_facet | Oleg A. Kozaderov Dmitrii M. Taranov Aleksander N. Krivoslykov Sofia V. Borodkina |
| author_sort | Oleg A. Kozaderov |
| collection | DOAJ |
| description | The study determined the kinetics of the selective anodic dissolution of the copper-zinc intermetallic compound Cu5Zn8 (gamma-phase) in an acetate buffer solution. Microscopic and X-ray analysis methods demonstrated the selective nature of the corrosive dissolution of Cu5Zn8. The dissolution results in the dezincification of the intermetalic compound and morphological development of its surface accompanied by the formation of the copper phase. A theoretical model of the transition of the electrode surface to the critical state together with the experimental concentration dependencies of the critical potential and critical overvoltage demonstrated that the dissolution of zinc from Cu5Zn8 is most probably limited
by the non-stationary diffusion mass-transfer in the solid phase of the intermetallic compound. The study also demonstrated that the phase transformation during the overcritical selective anodic dissolution of the gamma-phase of Cu5Zn8 in an acetate environment accelerates following the growth of the anodic potential and is controlled by the surface diffusion of adatoms towards the three-dimensional nucleus of the copper phase with instantaneous nucleation. |
| first_indexed | 2024-12-23T20:38:43Z |
| format | Article |
| id | doaj.art-fc86a4c50e284ad5aca1cd4b60a6d810 |
| institution | Directory Open Access Journal |
| issn | 1606-867X |
| language | English |
| last_indexed | 2024-12-23T20:38:43Z |
| publishDate | 2020-10-01 |
| publisher | Voronezh State University |
| record_format | Article |
| series | Конденсированные среды и межфазные границы |
| spelling | doaj.art-fc86a4c50e284ad5aca1cd4b60a6d8102022-12-21T17:32:00ZengVoronezh State UniversityКонденсированные среды и межфазные границы1606-867X2020-10-0122310.17308/kcmf.2020.22/2965Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8Oleg A. Kozaderov0https://orcid.org/0000-0002-0249-9517Dmitrii M. Taranov1https://orcid.org/0000-0003-0993-3707Aleksander N. Krivoslykov2https://orcid.org/0000-0001-7646-6841Sofia V. Borodkina3https://orcid.org/0000-0003-4676-261XVoronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian FederationVoronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian FederationVoronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian FederationVoronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian FederationThe study determined the kinetics of the selective anodic dissolution of the copper-zinc intermetallic compound Cu5Zn8 (gamma-phase) in an acetate buffer solution. Microscopic and X-ray analysis methods demonstrated the selective nature of the corrosive dissolution of Cu5Zn8. The dissolution results in the dezincification of the intermetalic compound and morphological development of its surface accompanied by the formation of the copper phase. A theoretical model of the transition of the electrode surface to the critical state together with the experimental concentration dependencies of the critical potential and critical overvoltage demonstrated that the dissolution of zinc from Cu5Zn8 is most probably limited by the non-stationary diffusion mass-transfer in the solid phase of the intermetallic compound. The study also demonstrated that the phase transformation during the overcritical selective anodic dissolution of the gamma-phase of Cu5Zn8 in an acetate environment accelerates following the growth of the anodic potential and is controlled by the surface diffusion of adatoms towards the three-dimensional nucleus of the copper phase with instantaneous nucleation.https://journals.vsu.ru/kcmf/article/view/2965copper-zinc alloygamma phaseselective dissolutionphase transformationsurface developmentheterogeneous nucleation. |
| spellingShingle | Oleg A. Kozaderov Dmitrii M. Taranov Aleksander N. Krivoslykov Sofia V. Borodkina Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 Конденсированные среды и межфазные границы copper-zinc alloy gamma phase selective dissolution phase transformation surface development heterogeneous nucleation. |
| title | Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 |
| title_full | Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 |
| title_fullStr | Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 |
| title_full_unstemmed | Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 |
| title_short | Kinetics of Phase Transformations during Selective Dissolution of Cu5Zn8 |
| title_sort | kinetics of phase transformations during selective dissolution of cu5zn8 |
| topic | copper-zinc alloy gamma phase selective dissolution phase transformation surface development heterogeneous nucleation. |
| url | https://journals.vsu.ru/kcmf/article/view/2965 |
| work_keys_str_mv | AT olegakozaderov kineticsofphasetransformationsduringselectivedissolutionofcu5zn8 AT dmitriimtaranov kineticsofphasetransformationsduringselectivedissolutionofcu5zn8 AT aleksandernkrivoslykov kineticsofphasetransformationsduringselectivedissolutionofcu5zn8 AT sofiavborodkina kineticsofphasetransformationsduringselectivedissolutionofcu5zn8 |