Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy
Zn-Cu alloys are promising for biomaterials due to their unique properties. Unlike most metallic alloys, Zn-Cu exhibits a partition coefficient greater than 1, leading to solvent segregation. This study aims to explore how microsegregation and cellular microstructure affect the corrosion behaviour o...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822825002163 |
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| author | Romulo S. Miranda Talita Vida Henrique S. Ligeiro Noé Cheung Fábio R. Simões Amauri Garcia Crystopher Brito |
| author_facet | Romulo S. Miranda Talita Vida Henrique S. Ligeiro Noé Cheung Fábio R. Simões Amauri Garcia Crystopher Brito |
| author_sort | Romulo S. Miranda |
| collection | DOAJ |
| description | Zn-Cu alloys are promising for biomaterials due to their unique properties. Unlike most metallic alloys, Zn-Cu exhibits a partition coefficient greater than 1, leading to solvent segregation. This study aims to explore how microsegregation and cellular microstructure affect the corrosion behaviour of a Zn-1wt%Cu alloy. Three specimens, with cellular spacings of approximately 8, 16, and 32 µm, were extracted from a directionally solidified casting. Electrochemical Impedance Spectroscopy and Potentiodynamic Polarization techniques were used to assess the corrosion performance in NaCl solutions. The results showed that coarser cellular structures demonstrated higher corrosion resistance, evidenced by greater charge transfer resistances and lower current densities. Corrosion initiated at the Cu-poor cellular boundaries, acting as anodic regions, and became more severe in finer microstructures. In contrast, larger cells with fewer boundaries exhibited less generalised corrosion, confirming that microstructural coarsening improves corrosion resistance. |
| format | Article |
| id | doaj-art-0811aa0ebaf04fcb95da3470eafb6a21 |
| institution | OA Journals |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-0811aa0ebaf04fcb95da3470eafb6a212025-08-20T02:28:37ZengElsevierNext Materials2949-82282025-07-01810069810.1016/j.nxmate.2025.100698Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloyRomulo S. Miranda0Talita Vida1Henrique S. Ligeiro2Noé Cheung3Fábio R. Simões4Amauri Garcia5Crystopher Brito6Postgraduate Program in Engineering, São Paulo State University, Guaratinguetá, BrazilDepartment of Aeronautical Engineering, School of Engineering/São Paulo State University, São João da Boa Vista, BrazilPostgraduate Program in Engineering, São Paulo State University, Guaratinguetá, BrazilDepartment of Manufacturing and Materials Engineering, University of Campinas, Campinas, BrazilInstitute of Marine Science, Federal University of São Paulo, Santos, BrazilDepartment of Manufacturing and Materials Engineering, University of Campinas, Campinas, BrazilPostgraduate Program in Engineering, São Paulo State University, Guaratinguetá, Brazil; Department of Aeronautical Engineering, School of Engineering/São Paulo State University, São João da Boa Vista, Brazil; Corresponding author at: Postgraduate Program in Engineering, São Paulo State University, Guaratinguetá, Brazil.Zn-Cu alloys are promising for biomaterials due to their unique properties. Unlike most metallic alloys, Zn-Cu exhibits a partition coefficient greater than 1, leading to solvent segregation. This study aims to explore how microsegregation and cellular microstructure affect the corrosion behaviour of a Zn-1wt%Cu alloy. Three specimens, with cellular spacings of approximately 8, 16, and 32 µm, were extracted from a directionally solidified casting. Electrochemical Impedance Spectroscopy and Potentiodynamic Polarization techniques were used to assess the corrosion performance in NaCl solutions. The results showed that coarser cellular structures demonstrated higher corrosion resistance, evidenced by greater charge transfer resistances and lower current densities. Corrosion initiated at the Cu-poor cellular boundaries, acting as anodic regions, and became more severe in finer microstructures. In contrast, larger cells with fewer boundaries exhibited less generalised corrosion, confirming that microstructural coarsening improves corrosion resistance.http://www.sciencedirect.com/science/article/pii/S2949822825002163Biodegradable Zn-Cu alloysMicrostructural refinementGalvanic corrosion mechanismsCorrosion behaviour in NaClElectrochemical performance of biomaterials |
| spellingShingle | Romulo S. Miranda Talita Vida Henrique S. Ligeiro Noé Cheung Fábio R. Simões Amauri Garcia Crystopher Brito Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy Next Materials Biodegradable Zn-Cu alloys Microstructural refinement Galvanic corrosion mechanisms Corrosion behaviour in NaCl Electrochemical performance of biomaterials |
| title | Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy |
| title_full | Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy |
| title_fullStr | Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy |
| title_full_unstemmed | Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy |
| title_short | Coupled effects of morphology/length scale of the microstructure and microsegregation on the corrosion behaviour of a single-phase Zn-1wt%Cu alloy |
| title_sort | coupled effects of morphology length scale of the microstructure and microsegregation on the corrosion behaviour of a single phase zn 1wt cu alloy |
| topic | Biodegradable Zn-Cu alloys Microstructural refinement Galvanic corrosion mechanisms Corrosion behaviour in NaCl Electrochemical performance of biomaterials |
| url | http://www.sciencedirect.com/science/article/pii/S2949822825002163 |
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