目的 提高316L不锈钢的耐腐蚀性能。方法 在316L不锈钢样品表面涂覆主要成分为1,2-二(三乙氧基硅基)乙烷（BTSE）的硅烷涂层。通过电化学分析测试，评价涂覆硅烷涂层的316L不锈钢的耐蚀性，并通过扫描电子显微镜和扫描电化学显微镜对其表面形貌进行分析。结果 在相同的腐蚀环境下，与未涂覆硅烷涂层的316L不锈钢样品相比，涂覆硅烷涂层样品的表面更加光滑，点蚀现象明显好转。电化学测试结果显示，涂覆硅烷涂层的316L不锈钢样品的腐蚀电位为?565.02 mV，未涂覆硅烷涂层样品的腐蚀电位为?796.01 mV，前者明显高于后者，其腐蚀倾向明显减小。另外，涂覆硅烷涂层的316L不锈钢样品的腐蚀电流为2.5177 μA，未涂覆硅烷涂层样品的腐蚀电流为5.4291 μA，涂覆硅烷涂层样品的腐蚀电流明显更小，表现出了更好的耐腐蚀性能。通过观察扫描电化学显微镜图像可以得出，未涂覆硅烷涂层的316L不锈钢样品的电流范围为?3.144×10?9 ~ ?1.957×10?9 A，涂覆硅烷涂层的316L不锈钢样品的电流范围为?3.004×10?9~ ?1.975×10?9 A，涂覆硅烷涂层样品的电流范围更窄，腐蚀程度明显减轻。结论 在316L不锈钢表面涂覆硅烷涂层可以在一定程度上减缓样品的腐蚀程度，硅烷涂层起到了物理屏障的作用，显着提高了316L不锈钢的耐腐蚀性。

The work aims to improve the corrosion resistance of 316L stainless steel. The silane coating with 1,2-bis (tri-ethoxysilyl) ethane (BTSE) as main component was coated on the surface of the 316L stainless steel sample. The corrosion re-sistance of coating on 316 stainless steel was evaluated by electrochemical analysis. The surface morphology was analyzed by scanning electron microscopy and scanning electrochemical microscopy. The silane-coated sample surface was smoother and pitting corrosion was significantly improved when compared to the silane-coated 316L stainless steel sample in the same corrosive environment. From the electrochemical test results, the corrosion potential of the silane-coated 316L stainless steel sample was ?565.02 mV and the corrosion potential of the uncoated-silane sample was ?796.01 mV. The corrosion potential of silane-coated 316L stainless steel sample was significantly higher than that of uncoated-silane sample, and the corrosion tendency was significantly reduced. In addition, the silane-coated 316L stainless steel sample had a corrosion current of 2.5177 μA and the uncoated sample had a corrosion current of 5.4291 μA. The silane-coated sample exhibited lower corrosion current and showed better corrosion resistance. From the scanning electrochemical microscopy image, the uncoated 316L stainless steel sample had a current range of ?3.144×10?9 ~ ?1.957×10?9 A, and the silane-coated 316L stainless steel sample had a current range of ?3.004×10?9 ~ ?1.975×10?9 A. The silane-coated sample had a narrower current range and less corrosion. Therefore, silane coating on the surface of 316L stainless steel can slow the corrosion of the sample to a certain extent. The silane coating acts as a physical barrier and significantly improves the corrosion resistance of 316L stainless steel.