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Simultaneous mapping of nanoscale topography and surface potential for the study of localized corrosion in 2024-T3 aluminum alloy and corrosion resistance introduced by a superhydrophobic coating

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Abstract

The localized corrosion phenomenon on 2024-T3 aluminum alloy is studied at nanoscale using simultaneous mapping of topography and surface potential by atomic force microscope in this work. The corrosion resistance imparted by a superhydrophobic coating is also studied using the same procedure for comparison. The results from simultaneous mappings revealed that the surface potential images obtained from SKPM images are capable of predicting the probable sites for the initiation of localized corrosion in the case of bare aluminum alloy substrate. The corrosion parameters for both substrates were quantified by potentiodynamic polarization.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

This work was supported by Center for Midstream Management and Science (CMMS) of Lamar University. The authors also appreciate the Center for Innovation, Commercialization and Entrepreneurship (CICE) at Lamar University for providing lab space.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Lamar University, Beaumont, TX, 77710, USA

    Divine Sebastian & Chun-Wei Yao

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  1. Divine Sebastian
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  2. Chun-Wei Yao
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Correspondence to Chun-Wei Yao.

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

Supplementary Information

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43579_2021_15_MOESM1_ESM.docx

(DOCX 3250 kb) Supplementary figures are available along with this article to improve the comprehensibility of this article. Supplementary figures include SEM images of the bare aluminum alloy and fabricated coating under different magnifications, EDX spectrum for the fabricated coating, variation of static contact angle with respect to the amount of nanoparticles in nanocomposite coating solution, and additional line analysis images for bare aluminum alloy substrate.

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Sebastian, D., Yao, CW. Simultaneous mapping of nanoscale topography and surface potential for the study of localized corrosion in 2024-T3 aluminum alloy and corrosion resistance introduced by a superhydrophobic coating. MRS Communications 11, 70–77 (2021). https://doi.org/10.1557/s43579-021-00015-1

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