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Corrosion Behavior of the 6061 Al–Mg–Si Alloy in Different Soils Extracts

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Abstract

In this work, the corrosion behavior of the 6061 Al-alloy in different temper conditions was studied in different soil extracts using electrochemical and surface monitoring techniques. The results showed that the corrosion behavior of the 6061 alloy depends on the soil extract composition, with the highest electrochemical activities related to the soil extracts with the lowest nitrate and sulfate concentrations. The 6061-T6 condition was more susceptible to corrosion than the 6061-HCR one. The results were related to the higher amounts of MgSi particles in the 6061-T6 alloy compared to the 6061-HCR. Sulfate and nitrate ions acted as corrosion inhibitor reducing the corrosion kinetics of the 6061 alloy in solutions with high concentration of chloride ions.

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Acknowledgements

The authors acknowledge the National Commission for Nuclear Energy (CNEN) in Brazil for financial support for this work and for the grant of Mariana X. Milagre (SEI 01342.002357/2019-32). Acknowledgments are also due to Dr. José A. B. de Souza and Dr. Stela M. C. Fernandes of the Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN) for providing the material used in this study.

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Authors and Affiliations

  1. Instituto de Pesquisas Energéticas e Nucleares – IPEN/CNEN, Av. Prof. Lineu Prestes, São Paulo, 2242, Brazil

    Mariana Xavier Milagre, João Victor de Sousa Araujo, Marco Stanojev Pereira, Frederico Genezini & Isolda Costa

  2. Departamento. de Engenharia Metalúrgica e de Materiais, Universidade de São Paulo, São Paulo, 05508-030, Brazil

    Caruline de Souza Carvalho Machado

  3. Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas, Universidade Federal do ABC, Av. dos Estados, Santo André, 5001, Brazil

    Renato Altobelli Antunes

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Milagre, M.X., Araujo, J.V.d., Machado, C.d. et al. Corrosion Behavior of the 6061 Al–Mg–Si Alloy in Different Soils Extracts. Metallogr. Microstruct. Anal. 11, 327–340 (2022). https://doi.org/10.1007/s13632-022-00848-9

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