TiN and TiAlN coatings were deposited by arc ion plating on titanium alloys to study their hot corrosion resistance when they were exposed to NaCl at 600 °C. The microstructure and corrosion behaviors of nitride coatings were studied using scanning electron microscope, X-ray diffraction, electro-probe microanalyzer and X-ray photoelectron spectroscopy. The results showed that nitride coatings with the different compositions and the ones with the same composition but different thicknesses presented different hot corrosion resistance. TiN and thin TiAlN coatings showed poor corrosion resistance. Serious internal oxidation attacked the alloy substrate. Their corrosion products were mainly consisted of non-protective TiO₂ and sodium salt. By contrast, the thick TiAlN coating presented outstanding corrosion resistance. Besides sodium salt, the corrosion products were composed of protective Al₂O₃. The increasing thickness of TiAlN significantly enhanced the hot corrosion resistance. The corrosion mechanisms of alloy, TiN and TiAlN coatings were discussed in detail.

通过电弧离子镀在钛合金上沉积 TiN 和 TiAlN 涂层，以研究它们在 600 °C 下暴露于 NaCl 时的热腐蚀性能。采用扫描电子显微镜、X射线衍射、电探针显微分析仪和X射线光电子能谱研究了氮化物涂层的微观结构和腐蚀行为。结果表明，不同成分的氮化物涂层和相同成分但不同厚度的氮化物涂层表现出不同的耐热腐蚀性能。TiN 和薄的 TiAlN 涂层显示出较差的耐腐蚀性。严重的内部氧化侵蚀了合金基材。它们的腐蚀产物主要是非保护性的 TiO ₂和钠盐。相比之下，厚的 TiAlN 涂层表现出出色的耐腐蚀性。除钠盐外，腐蚀产物由保护性Al ₂ O _{3 组成}。TiAlN 厚度的增加显着提高了抗热腐蚀性能。详细讨论了合金、TiN和TiAlN涂层的腐蚀机理。