目的 在304不锈钢表面制备DLC薄膜，并探究其在1 mol/L NaOH、3.5%NaCl、1 mol/L H2SO4溶液中的摩擦磨损行为。方法 通过非平衡磁控溅射设备（UPD650）制备DLC薄膜。采用扫描电子显微镜、拉曼光谱仪，对DLC薄膜的微观结构及磨斑、磨痕进行表征。使用划痕仪和纳米压痕仪，分别测试DLC薄膜的结合力、硬度和弹性模量。使用接触角测量仪测试1 mol/L NaOH、3.5%NaCl、1 mol/L H2SO4溶液和去离子水在304不锈钢和DLC薄膜表面的润湿角。采用CSM摩擦试验机研究304不锈钢和DLC薄膜的摩擦磨损行为。利用动电位极化评价304不锈钢和DLC薄膜的耐腐蚀性能。结果 304不锈钢表面制备的薄膜厚度约1.95 μm，结合力为37 N左右，硬度和弹性模量分别约为14.7 GPa和191.1 GPa。DLC薄膜在1 mol/L NaOH溶液中的摩擦系数高达0.18，而在3.5%NaCl、1 mol/L H2SO4溶液和去离子水中的摩擦系数低至0.05左右。在1 mol/L NaOH、3.5%NaCl、1 mol/L H2SO4溶液中，DLC薄膜的磨损率比304不锈钢的小2、3个数量级。极化测试结果显示，DLC薄膜在不同介质中的腐蚀电流密度顺序为1 mol/L H2SO4<3.5%NaCl<1 mol/L NaOH。结论 沉积的DLC薄膜具有良好的机械性能和耐腐蚀性能，能够很好地改善304不锈钢在1 mol/L NaOH、3.5%NaCl、1 mol/L H2SO4溶液中的摩擦磨损性能。

The work aims to prepare DLC film on the surface of 304 stainless steel and investigate the friction and wear behavior of the film in 1 mol/L NaOH, 3.5%NaCl, and 1 mol/L H2SO4 solution. DLC film was prepared by unbalanced magnetron sputtering device (UPD650). The microstructure and wear scars of DLC film were characterized by scanning electron microscopy and Raman spectroscopy. The adhesion strength, hardness and modulus of elasticity of the DLC film were tested by scratch tester and nano-indenter. The wetting angle of 1 mol/L NaOH, 3.5%NaCl, 1 mol/L H2SO4 solution, and deionized water on the surface of 304 stainless steel and DLC film were tested by contact angle meter. The friction and wear behavior of 304 stainless steel and DLC film were studied by CSM friction tester. The corrosion resistance of 304 stainless steel and DLC film were evaluated by potentiodynamic polarization. The thickness of DLC film prepared on the surface of 304 stainless steel was around 1.95 μm, the bonding force was about 37 N, and the hardness and elastic modulus were about 14.7 GPa and 191.1 GPa, respectively. Surprisingly, the coefficient of friction of the DLC film in 1 mol/L NaOH solution was as high as 0.17, while the friction coefficients in 3.5%NaCl, 1 mol/L H2SO4 solution, and deionized water were about 0.05. The wear rates of DLC film in 1 mol/L NaOH, 3.5%NaCl, and 1 mol/L H2SO4 solution were 2, 3 orders of magnitude smaller than that of 304 stainless steel. The result of polarization test showed that the order of corrosion current density was: 1 mol/L H2SO4<3.5%NaCl<1 mol/L NaOH. Therefore, the deposited DLC film processes excellent mechanical properties and corrosion resistance, which improves the wear properties of 304 stainless steel in 1 mol/L NaOH, 3.5%NaCl, and 1 mol/L H2SO4 solution.