Nucleation and growth behavior of protective coating by plasma electrolytic oxidation considering grain size of 6061 aluminum alloy

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Authors

Maryam Chafiq¹ , Abdelkarim Chaouiki¹ , Young Gun Ko¹

1. School of Materials Science and Engineering, Yeungnam University

Conference / event

Conference on Research in Chemistry and Chemical Education, September 2022 (Bandung, Indonesia)

Poster summary

The work investigated nucleation and growth mechanism of protective coating during plasma electrolytic oxidation (PEO) by considering grain size of 6061 Al alloy substrate. Prior to PEO treatment, the substrate with grain size of 50 µm (coarse-grain, CG) was deformed via 4-pass differential-speed rolling (DSR) to achieve grain size of 1 µm (fine-grain, FG). Unlike CG, FG caused an early breakdown and more uniform characteristics of plasma sparks, resulting in the thick and compact layer. The nucleation and growth mechanism of the coating layer were scrutinized on the basis of transport behavior of massive electrons across the grain boundaries at the initial stage of PEO. The mechanical and corrosion properties of both samples were evaluated in a quantitative manner.

Keywords

Plasma electrolysis, Surface modification, Differential-speed rolling, Nucleation, Growth

Research areas

Material Sciences

References

No data provided

Funding

No data provided

Supplemental files

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Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

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

Creative Commons license

Copyright © 2024 Chafiq et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.