采用电沉积Ni-P/SiC涂层外加浸制PTFE两段工艺在316L不锈钢表面获得Ni-P/SiC/PTFE涂层,应用扫描电子显微镜(SEM)、能谱(EDS)等分析表面形貌和成份,采用电化学方法对其在0.5 mol/L H2SO4+2×10-6 HF溶液中的耐腐蚀性能进行了研究,通过OCOA润湿角系统测试涂层电化学腐蚀后表面的疏水性能.结果表明:在不锈钢表面制备的Ni-P/SiC/PTFE涂层均匀致密,极大地提高了不锈钢的自腐蚀电位,其自腐蚀电流密度由7.62μA/cm2减小到0.008μA/cm2;涂层在0.6 V电压下耐久性能优异,腐蚀电流密度稳定值为0.19μA/cm2,测试后涂层的润湿角为134.5°.“,”Ni-P/SiC/PTFE coating was obtained on the surface of 316L stainless steel by electrodeposition of Ni-P/SiC coating and immersion of PTFE (polytetrafluoroethylene). The surface morphology and composition were analyzed by scanning electron microscope and energy dispersive spectrometer. The corrosion resistance of the coating in 0.5 mol/L H2SO4+2×10-6 HF solution was studied by electrochemical method. Surface contact angle was used to test the hydrophobic properties of the coating. The results indicated that the Ni-P/SiC/PTFE coating prepared on the surface of stainless steel was uniform and compact, which significantly improved the self-corrosion potential of stainless steel. The self-corrosion current density decreased from 7.62 to 0.008 μA/cm2. The durability performance of coating was tested under 0.6 V voltage and the stable corrosion current density value was 0.19 μA/cm2, then wetting angle was tested after durability experiment and the value is 134.5 °.