**4. Conclusions**

A new approach to ceramic protective coating formation by the MAO process in molten salt was described. A TiAl6V4 alloy has been subjected to MAO treatment in a eutectic nitrate molten salt mixture. The thickness of the oxide coating reached 2.5 μm and the morphology examination evaluated the presence of a typical structure with homogeneously distributed round pores.

Phase composition analysis detected the presence of titanium oxide and titanium aluminum intermetallic (Al0.3Ti1.7). This was confirmed by EDS analysis.

The protective coating was subjected to corrosion resistance testing, and it was found that the specimen by coated MAO treatment is 20 times more resistant than the untreated specimen.

A comparison of the process conducted in molten salt with the process conducted in aqueous electrolyte showed the following benefits: the pores obtained on the surface are smaller, the coating has no impurities, the corrosion resistance is higher, and the process is economically beneficial due to the significantly lower potentials applied.

**Author Contributions:** Conceptualization and Methodology, A.S., A.K., M.Z. and K.B.; Experimental, A.S., I.W. and A.K.; SEM, EDS, and Micro-Hardness, A.S. and I.W.; XRD, A.K.; Data analysis A.S., M.Z. and K.B.; Writing, Reviewing and Editing A.S. and K.B.; Supervision M.Z. and K.B.

**Funding:** This research received no external funding.

**Acknowledgments:** This work was carried out with the support of the Ministry of Aliyah and Integration, the State of Israel.

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