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Microstructure and corrosion of AZ91 with small amounts of cerium

Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review

Authors

  • D. Zander
  • M. Heilig
  • N. Hort
  • G. Klaus
  • A. Buehrig-Polaczek
  • J. Grbbner
  • R. Schmid-Fetzer

Recent investigations of magnesium-aluminum alloys revealed a strong influence of four key microstructural parameters on corrosion: porosity, volume fraction, distribution and Al-content of the γ-Al12Mg 17 phase. Additionally, an improved corrosion resistance was observed by the addition of rare earth elements. The influence of cerium on the casting skin, inner microstructure, and corrosion of sand-cast and die-cast AZ91D with 0.5-2.0 wt.% cerium was investigated by SEM before and after potentiodynamic measurements and electrochemical impedance spectroscopy in pH8 and pHll. Cerium significantly improved the corrosion resistance through formation of a passive layer. Strong influences of cerium on the microstructure (average grain size, changes in morphology and/or volume fraction of Mg17Al12 particles, and formation of cerium-rich intermetallic phases) were observed. Microstructural influences as well as the change in chemical composition alter the local corrosion mechanism and passive layer formation in AZ91D augmented with cerium.

Original languageEnglish
Title of host publicationMagnesium Technology 2010 - Held During TMS 2010 Annual Meeting and Exhibition
EditorsSean R. Agnew, Neale R. Neelameggham, Eric A. Nyberg, Wim H. Sillekens
Number of pages5
PublisherJohn Wiley & Sons Inc.
Publication date2010
Pages187-191
ISBN (print)9780873397469
Publication statusPublished - 2010
Externally publishedYes
EventMagnesium Technology 2010 - TMS 2010 Annual Meeting and Exhibition - Seattle, WA, United States
Duration: 14.02.2010 → 18.02.2010

    Research areas

  • AZ91, Corrosion, Microstructure, Rare earth elements
  • Engineering

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Zhang, Y., Cao, J., Liu, H., Wang, C., Chu, C., Xue, F., Willumeit-Römer, R., Hort, N., Huang, Y. & Bai, J., 05.2025, In: Journal of Magnesium and Alloys. 13, 5, p. 2103-2119 17 p.

Research output: Journal contributions › Journal articles › Research › peer-review

Insight into the self-healing performance of dicalcium phosphate dihydrate coating on magnesium wires: Its damage and anti-corrosive behavior under deformation

Zhang, Y., Nie, T., Chen, D., Jiang, G., Xu, W., Liu, H., Qian, K., Ju, J., Chu, C., Xue, F., Huang, Y., Hort, N. & Bai, J., 09.2025, In: Corrosion Science. 254, 17 p., 113051.

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Microstructure-Oriented Fatigue Crack Propagation in Two Cast Mg–Al–Ba–Ca Alloys

Maier, P., Wolfram, B., Roggelin, J. & Hort, N., 2025, Magnesium Technology 2025. Tolnai, D., Palumbo, A., Leonard, A. & Neelameggham, N. R. (eds.). Springer Science and Business Media Deutschland, p. 87-96 10 p. (Minerals, Metals and Materials Series).

Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review

The Role of Geometry in Mg Implant Design

Hort, N., Wiese, B., Witte, F. & Maier, P., 2025, Magnesium Technology 2025. Tolnai, D., Palumbo, A., Leonard, A. & Neelameggham, N. R. (eds.). Cham: Springer Science and Business Media Deutschland, p. 3-8 6 p. (Minerals, Metals and Materials Series).

Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review

Utilizing Synchrotron Radiation for Phase Identification in Mg Alloys

Szakács, G., Tolnai, D., Wiese, B. & Hort, N., 2025, TMS 2025 154th Annual Meeting and Exhibition Supplemental Proceedings. Cham: Springer Nature, p. 1587-1599 13 p. (The Minerals, Metals and Materials Series).

Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review

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