316L stainless steel is used as an important structural material in various industries. However, its service life is limited in the presence of chloride ions due to severe chemical corrosion. Herein, a facile radiofrequency magnetron sputtering process is reported for the synthesis of various Al₂O₃–TiO₂ composite coatings as an anticorrosion layer for 316L stainless steel substrates. The enhanced chemical stability of Al₂O₃–TiO₂ composite coatings was investigated by X‐ray photoelectron spectroscopy, electron paramagnetic resonance, and X‐ray diffraction measurements. Moreover, the high specific surface area of Al₂O₃–TiO₂ composite coatings displayed better hydrophobic property which can be confirmed by scanning electron microscopy and contact angle measurements. Finally, the direct characterization of anticorrosion properties was carried out using electrochemical tests. All of the above results exhibited the enhanced anticorrosion properties of Al₂O₃ coating after the incorporation of TiO₂. Significantly, the Al₂O₃–TiO₂ composite coatings with 15.56% Ti content provided the best corrosion resistance for 316L stainless steel.

中文翻译：

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具有增强的316L不锈钢防腐性能的Al2O3-TiO2复合涂层

316L不锈钢在各个行业中用作重要的结构材料。然而，由于严重的化学腐蚀，在存在氯离子的情况下其使用寿命受到限制。本文报道了一种简便的射频磁控溅射工艺，用于合成各种Al ₂ O ₃ -TiO ₂复合涂层，作为316L不锈钢基板的防腐层。通过X射线光电子能谱，电子顺磁共振和X射线衍射测量研究了Al ₂ O ₃ -TiO ₂复合涂层增强的化学稳定性。此外，Al ₂ O ₃ -TiO的高比表面积_2种复合涂料显示出更好的疏水性，这可以通过扫描电子显微镜和接触角测量得到证实。最后，使用电化学测试对防腐性能进行了直接表征。以上所有结果都表明，加入TiO ₂后，Al ₂ O ₃涂层的防腐性能增强。值得注意的是，Ti含量为15.56％的Al ₂ O ₃ -TiO ₂复合涂层为316L不锈钢提供了最佳的耐腐蚀性。