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Effect of Manufacturing Parameters on the Corrosion Behavior of AZ31 Coated by Mg–Al Layered Double Hydroxide

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Abstract

In the present study, a simple in situ hydrothermal method was used to fabricate Layered Double Hydroxide conversion coating at different treatment temperatures, times and pH values on the surface of AZ31 magnesium alloy. The films were characterized using XRD, FTIR, XPS, EDS and FESEM. The corrosion resistance of the coatings was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and electrochemical noise techniques. The results confirmed the anion exchange ability of the LDH film. Moreover, the best results were obtained at 160 °C, 8 h and pH of 10. Dense and compact blade-like structures were obtained which exhibited appropriate corrosion resistance. The self-healing ability of the films was improved by increasing the LDH content of the film.

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Authors and Affiliations

  1. Faculty of Materials and Metallurgical Engineering, Amirkabir University of Technology, Hafez Ave, P.O. Box 15875-4413, Tehran, Iran

    Salimeh Hasanbeigi, Seyed Hadi Tabaian & Sepehr Yazdani

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  1. Salimeh Hasanbeigi
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  2. Seyed Hadi Tabaian
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  3. Sepehr Yazdani
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Correspondence to Seyed Hadi Tabaian.

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Hasanbeigi, S., Tabaian, S. & Yazdani, S. Effect of Manufacturing Parameters on the Corrosion Behavior of AZ31 Coated by Mg–Al Layered Double Hydroxide. Met. Mater. Int. 27, 4441–4454 (2021). https://doi.org/10.1007/s12540-020-00692-y

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