Surface characterization of anodized zamac 5
DOI:
https://doi.org/10.33448/rsd-v11i16.37702Keywords:
Zamak; Anodizing; Zn-Al.Abstract
Zamak is a Zn-Al-based metal alloy that has proven to be extremely versatile. This alloy has a low melting point and excellent fluidity, which makes it possible to obtain parts of complex geometry on a large scale, through the pressure casting process. However, the manufacturing process generates gaseous porosities inside the parts, which makes the alloy present a corrosion resistance lower than the minimum established by NBR 10283 regarding the surface of sanitary metals. The objective of this work is to characterize the surface of Zamak 5 injected under pressure after being subjected to the anodizing process. To carry out the proposed analysis, Zamak 5 samples were injected under pressure and subjected to different anodizing times: 20, 50, 110, 300, 1800 and 3600 seconds. The samples were analyzed with scanning electron microscopy (SEM), microhardness, roughness and potentiodynamic polarization assay. The results showed that the Zamak before the anodizing process presented greater corrosion resistance than after this treatment. This can be explained by the preparation process for anodizing, which makes the part more susceptible to corrosion and by the appearance of cracks and cracks that appeared with the anodizing process. However, among the anodized samples, the longer the anodizing time, the more noble its behavior became. It was found that the surface layer is composed of oxalates and oxides of zinc and aluminum. This surface layer showed an increase in hardness and surface roughness.
References
Andreoni, L. (1998). Le lighe de zinco Zama. Edimet SPA, 171p.
Babapour, H., Jalali, H., Mohammadi, N. A. (2021). The synergistic effects of zinc oxide nanoparticles and fennel essential oil on physicochemical, mechanical, and antibacterial properties of potato starch films. Food Science & Nutrition, 9(7), p. 3893–3905.
Bianchin, A., Kunst, S. R., Mueller, L. T., Ferreira, J. Z., Carone, C. L. P., Oliveira, C. T. (2020). Influence of the Anodization Process on Zamak 5 Corrosion Resistance. Materials Research, 23(4), p. 1-12.
Dienstmann, F. K., Kunst, S. R., Fuhr, L. T., Scheffel, L. F., Carone, C. L. P., Morisso, F. D. P., Schneider, E. L., Ferreira, J. Z., Oliveira, C. T. (2021). Tratamento térmico em Zamac visando diminuir defeitos de porosidade. Tecnologia em metalurgia, materiais e mineração, 18, p. e2070.
Dieter, F. B., Scheffel, L. F., Morisso, F. D. P., Carone, C. L. P., Kunst, S. R., Mueller, L. T., Fuhr, L. T., Vecchia, F. D., Schneider, E. L., Oliveira, C. T. (2020). Análise dos Efeitos da Adição de Alumina (Al2O3) na Microestrutura e Dureza do Zamac 5 Fundido Por Gravidade. Tecnologia em metalurgia, materiais e mineração, 17, p. e1963.
Estrela, C. (2018). Metodologia científica: Ciência, Ensino e Pesquisa. 3ª Edição, Editora: Artes Médicas, Universidade Federal de Goiás (FO/UFG) – Goiás, 738p.
Führ, Luciane Taís. Influência dos defeitos de solidificação na resistência à corrosão do zamac 5. 2012. 70 f. Dissertação (Mestrado) – Curso Profissional em Tecnologia dos Materiais e Processos Industriais, Universidade Feevale, Novo Hamburgo, 2012.
Fuhr, L. T., Moura, A. B. D., Carone, C. L. P., Morisso, F. P., Scheffel, L. F., Kunst, S. R., Ferreira, J. Z., Oliveira, C. T. (2020). Colored anodizing of titanium with pyroligneous solutions of black wattle. Matéria (Rio de Janeiro), 25(2), p. 104-122.
Ghomashchi, M. R., Vikhrov, A. (2000). Squeeze casting: an overview. Journal of Materials Processing Technology, 101, p.1-9.
Goodwin, F. (2010). Desenvolvimento de ligas de zinco com propriedade de fluidez melhorada. Revista Fundição e Serviços, 210, p. 20-31.
Hu, X. G., Zhu, Q., Midson, S. P. et al. (2017). Blistering in semi-solid die casting of aluminium alloys and its avoidance. Acta Materialia, 124, p. 446-455.
Kanani, N. (2004). Electroplating- Basic Principles, Processes and Practice. Elsevier, Berlin, Germany, 354p.
Kao, T. T., Chang, Y. C. (2014). Influence of Anodization Parameters on the Volume Expansion of Anodic Aluminum Oxide Formed in Mixed Solution of Phosphoric and Oxalic Acids. Applied Surface Science, 288(1), p. 654-659.
Kunst, S.R., Bianchin, A. C. V., Mueller, L. T., Santana, J. A., VolkmeR, T. M., Morisso, F. D. P., Carone, C. L. P., Ferreira, J. Z., Mueller, I. L., Oliveira, C. T. (2021). Model of Anodized Layers Formation in Zn–Al (Zamak) Aiming to Corrosion Resistance. Journal of Materials Research and Technology, 12, p. 831-847.
Lilov, E., Lilova, V., Girginov, Ch., Kozhukharov, S., Tsanev, A., Yancheva, D. (2019). Induction periods during anodic polarization of zinc in aqueous oxalic acid solutions. Materials Chemistry and Physics, 233(1), p. 727-736.
Malavazi, Jefferson. Votorantim metais: manual de fundição sob pressão. São Paulo – SP, 2015.
Marcolin, P., Kunst, S. R., Oliveira, C. T. et al. (2017). Effects of the Casting Temperature in the Leakage of Zamac 5. Materials Science Forum, 899, p. 458-462.
Metals Handbook. Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. v.2. Editora ASM. 1990.
Pereira, A. S., Shitsuka, D. M., Parreira, F. J., Shitsuka, R. (2018). Metodologia da pesquisa científica. 1ª Edição UAB/NTE/UFSM, Universidade Federal de Santa Maria – RS, 119p.
Reveko, V., Moller, P. (2018). Special Aspects of Electrodeposition on Zinc Die Castings. Nasf Surface Technology White, 82(8), p.1-9.
Severino, A. J. (2013). Metodologia do trabalho científico. 3ª Edição, Cortez Editora, São Paulo – SP, 274p.
Su, Z.; Zhou, W. (2008). Porous Anodic Metal Oxides. Science Foundation in China, 16(1), p.16-36.
Tamimi, N., Nafchi, A.M., Moghaddam, H.H., Baghaie, H. (2021). The effects of nanozinc oxide morphology on functional and antibacterial properties of tapioca starch bionanocomposite. Food Science & Nutrition, 9(8), p. 4497–4508.
Yang, L. J. (2003). The effect of casting temperature on the properties of squeeze cast aluminium and zinc alloys. Journal of Materials Processing Technology, 140, p.391-396.
Yoshino, N.Y. (Brasil) (Org.). Manual de Fundição sob Pressão. São Paulo: Grupo Votorantim Metais, 2010.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2022 Felipe Rangel Milcharek; Sandra Raquel Kunst; Cláudia Trindade Oliveira; Pedro Carlos Hernandez Junior
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
1) Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2) Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3) Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
