目的 沉积出在含有泥沙的模拟油气田溶液中具有优异耐蚀性与耐磨性的类金刚石碳基(DLC)薄膜来对油气开采时的管道进行保护。方法 通过等离子体增强化学气相沉积(PECVD)技术在SS304方形试样表面沉积H-DLC、F-HDLC、N-HDLC及Si-HDLC，通过电化学测试表征了其在模拟油气田CO2/H2S/Cl^?溶液中的耐蚀性。采用CSM往复式摩擦机测试了其在含有泥沙的模拟溶液中的耐蚀性，结合拉曼光谱、扫描电镜(SEM)等技术分析了摩擦测试后的磨斑与磨痕形貌。结果 DLC薄膜的沉积显著提高了SS304基底的耐蚀性，Si掺杂的DLC薄膜具有最高的孔隙电阻与最低的腐蚀电流密度，沉积薄膜后的腐蚀电流密度与SS304基底相比降低了2个数量级。沉积DLC薄膜后SS304基底的耐磨性大幅提高，转移膜的形成降低了摩擦因数与磨损率，薄膜的沉积使磨损率降低了约2个数量级，在与模拟沙粒的SiO2对偶球进行摩擦时转移膜仍能稳定形成。通过向腐蚀溶液中添加SiO2粉末模拟了SS304基底与DLC薄膜在含有大量泥沙的油气采出水中的磨损，摩擦测试后SS304基底表面发生严重的磨粒磨损，不同元素掺杂的DLC薄膜表面均存在不同程度的剥落，但与基底相比极大地缓解了基底磨损。结论 DLC薄膜的沉积可以极大地提高SS304基底的耐蚀性与耐磨性，Si-HDLC薄膜在模拟油气田溶液中具有最优越的耐蚀性与稳定性，进而使其在腐蚀溶液中具有优异的耐磨性。

Oil and gas resources are the main energy and chemical raw materials in the world today. Under the premise of limited total reserves of oil and gas resources, in order to improve the efficiency of oil and gas exploitation, CO2 flooding technology is widely used. However, CO2 flooding technology aggravates the acidification of oilfield produced water, so that oil and gas production pipelines are in a solution containing CO2/H2S/Cl? for a long time. The oilfield produced water solution has strong permeability and corrosivity. At the same time, the oil and gas exploitation is also faced with the abrasion of sand, which aggravates the corrosion. Therefore, there is an urgent need for a material to protect the inner surface of oil and gas exploitation pipelines. At present, the methods of protecting oil and gas exploitation pipelines have the defects of environmental pollution and high cost. At the same time, it is difficult to protect pipelines in the harsh environment of oil and gas exploitation. Diamond-like carbon (DLC) film with high hardness, high wear resistance and high corrosion resistance is an excellent protective material for oil and gas pipelines. In this work, H-DLC, F-HDLC, N-HDLC and Si-HDLC were deposited on the surface of SS304 square sample by plasma enhanced chemical vapor deposition (PECVD) technology, and their corrosion resistance in CO2/H2S/Cl? solution of simulated oil and gas fields was characterized by electrochemical test. The CSM reciprocating friction machine was used to test the corrosion resistance in simulated solution containing sediment. The wear scar and its morphology after friction test were analyzed by Raman spectroscopy and scanning electron microscopy (SEM). The deposition of DLC film significantly improved the corrosion resistance of SS304 substrate. The doping of Si element reduced the internal stress of DLC film, and increased the content of sp3-C hybridization, and greatly improved the corrosion resistance of H-DLC film. The Si-doped DLC film possessed the highest pore resistance and the lowest corrosion current density, and had the best corrosion resistance in simulated oil and gas field solution. The wear resistance of SS304 substrate was greatly improved after deposition of DLC film. The formation of transfer film reduced the friction coefficient and wear rate. The transfer film could still be formed stably when rubbing with the SiO2 counterpart ball of simulated sand. The wear of SS304 substrate and DLC film in oil and gas produced water containing a large amount of sediment was simulated by adding SiO2 powder to the corrosion solution. After the friction test, severe abrasive wear occurred on the surface of SS304 substrate. The surface of DLC film doped with different elements had different degrees of spalling, but it greatly alleviated the wear of the substrate compared with the substrate. The deposition of DLC film can greatly improve the corrosion resistance and wear resistance of SS304 substrate. Si-HDLC film possesses the best corrosion resistance and stability in simulated oil and gas field solution, which makes it have excellent wear resistance in corrosion solution.