為提高304不銹鋼的抗高溫氧化性能，以正硅酸乙酯(TEOS)為原料，采用溶膠-凝膠法，在不銹鋼表面制備了SiO2薄膜，通過氧化動力學，XRD，SEM和EDS分析，研究了涂覆層數對不銹鋼900 ℃抗高溫氧化性能的影響。結果表明，SiO2薄膜與不銹鋼基體的附著性良好，促進了不銹鋼表面發生選擇性氧化，生成保護作用的Cr2O3和NiCr2O4氧化層，不銹鋼的抗高溫氧化性能顯著提高，其中涂覆3層SiO2薄膜試樣的抗高溫氧化性能最佳，經900 ℃循環氧化100 h后氧化增重與氧化剝落僅為未涂覆試樣的58.1%和41.4%。SiO2薄膜涂覆有效提高了不銹鋼的抗高溫氧化性能，是表面處理方法應用于高溫環境的又一嘗試，為溶膠-凝膠法制備其他薄膜提供了借鑒和參考。
In order to improve the oxidation resistance of 304 stainless steel, SiO2 thin film was prepared on the surface of stainless steel by sol-gel method with tetraethyl orthosilicate (TEOS) as raw material. The effect of film layers on the high temperature oxidation resistance of stainless steel at 900 ℃ was studied by means of oxidation kinetics, XRD, SEM and EDS. The results show that the adhesion of SiO2 film to stainless steel matrix is good, which promotes the selective oxidation on the stainless steel surface and the formation of protective Cr2O3 and NiCr2O4 oxide layers. The high temperature oxidation resistance of stainless steel is improved remarkably. The oxidation resistance of the sample coated with three layers of SiO2 film proforms the best, and the oxidation weight gain and oxidation spalling of the sample are only 58.1% and 41.4% of the uncoated sample after 100 hours of cyclic oxidation at 900 ℃. The high temperature oxidation resistance of stainless steel is effectively improved through SiO2 film coating, which is another attempt of surface treatment method applied to high temperature environment, and provides reference for other thin films prepared by sol-gel method.