Abstract
An amorphous AlTiO coating was prepared using arc ion plating. Its wear resistance and corrosion resistance were compared with those of AlTiN coating. The results indicated that the amorphous AlTiO coating had a dense structure, with H/E ratio and friction coefficient of 0.06 and 0.70, respectively, which were approaching to the values for the AlTiN coating. The friction and wear tests demonstrated that both AlTiN coating and AlTiO coating had good wear resistance. Electrochemical experiments demonstrated that the AlTiO coating exhibited excellent corrosion resistance, with a corrosion current density (Icorr) only 1.97% of that of the AlTiN coating. After neutral salt spray corrosion test with a duration of 500 h, the AlTiN coating was completely corroded, while only two corrosion spots were observed on the AlTiO coating.
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