**4. Conclusions**

This research has investigated the enhancements of different ceramic coatings (Plasma Electrolytic Oxidation (PEO), Plasma Spray Ceramic (PSC) and Hard Anodizing (HA)) on the performances of 6082-T6 aluminum alloy surface against corrosion environments. Coatings properties have been characterized using various metallurgical tools. A series of electrochemistry experiments were used to evaluate the corrosion performances of the three types of coatings. It has been shown that the corrosion performances of aluminum alloy can be highly increased using different surface treatments. PEO coating gives a higher level of corrosion resistance compared to the HA and the PSC coatings. The findings are summarized as follows:


**Author Contributions:** Conceptualization, A.A.; Methodology, E.R.I.M. and S.Z.K.; Validation, V.T.; Formal Analysis, A.A., E.R.I.M. and S.Z.K.; Investigation, V.T.; Data Curation, A.A.; Writing—Original Draft Preparation, E.R.I.M. and A.A.; Writing—Review & Editing, E.R.I.M. and S.Z.K.; Supervision, A.A.; Project Administration, A.A.; Funding Acquisition, A.A.

**Funding:** This research was funded by [Scientific Research Deanship, King Khalid University (KKU)] gran<sup>t</sup> number [G.R.P.2/6/38].

**Acknowledgments:** Authors thankfully acknowledge the funding and support provided by the Scientific Research Deanship, King Khalid University (KKU), Abha-Asir, Saudi Arabia, with gran<sup>t</sup> number G.R.P.2/6/38 under the research group "Materials & Production" to complete the research work.

**Conflicts of Interest:** The authors declare no conflict of interest.
