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Magnesium 2021 pp 217–225Cite as

The Role of Native Oxides on the Corrosion Mechanism of Laves Phases in Mg–Al–Ca Composites

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Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Magnesium–aluminum–calcium composites are characterized by thermally stable Laves phases, which enable high-temperature material applications. Nevertheless, immersing the material into an electrolyte causes an increased corrosion rate as a consequence of micro-galvanic effects among the Laves phases and the matrix. The Volta-potential difference determined under atmospheric conditions on a freshly polished surface using Scanning Kelvin Probe Force Microscopy (SKPFM) is a valid measure for the micro-galvanic coupling and the dynamic growth kinetics of a native oxide film. In the present study, the time-dependent native oxide film formation of magnesium–aluminum–calcium alloys is analyzed via in situ SKPFM measurements. An inhomogeneous evolution of the Volta-potential on the Laves phases compared to the matrix indicates heterogeneous native oxide formation.

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Acknowledgements

Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-Project-ID 409476157-SFB 1394 and INST 256/455-1 FUGG.

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Authors and Affiliations

  1. Chair of Corrosion and Corrosion Protection, Division of Materials Science and Engineering, Foundry Institute Aachen, RWTH Aachen University, Aachen, Germany

    Markus Felten, Jakub Nowak & Daniela Zander

  2. Department of Material Science and Technology, Saarland University, Bldg. D2.2, 66123, Saarbrücken, Germany

    Patrick Grünewald, Florian Schäfer & Christian Motz

Authors
  1. Markus Felten
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  2. Jakub Nowak
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  3. Patrick Grünewald
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  4. Florian Schäfer
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  5. Christian Motz
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  6. Daniela Zander
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Corresponding author

Correspondence to Daniela Zander .

Editor information

Editors and Affiliations

  1. The Ohio State University, Columbus, OH, USA

    Alan Luo

  2. McGill University, Montreal, QC, Canada

    Mihriban Pekguleryuz

  3. University of Virginia, Charlottesville, VA, USA

    Sean Agnew

  4. University of Michigan, Ann Arbor, MI, USA

    John Allison

  5. Wrocław University of Science and Technology, Wrocław, Poland

    Karl Kainer

  6. Tungsten Parts Wyoming, Laramie, WY, USA

    Eric Nyberg

  7. University of British Columbia, Vancouver, BC, Canada

    Warren Poole

  8. CanmetMATERIALS, Hamilton, ON, Canada

    Kumar Sadayappan

  9. CanmetMATERIALS, Hamilton, ON, Canada

    Bruce Williams

  10. McGill University, Montreal, QC, Canada

    Steve Yue

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Felten, M., Nowak, J., Grünewald, P., Schäfer, F., Motz, C., Zander, D. (2021). The Role of Native Oxides on the Corrosion Mechanism of Laves Phases in Mg–Al–Ca Composites. In: Luo, A., et al. Magnesium 2021. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-72432-0_22

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