新型苯并三氮唑功能化离子液体的缓蚀与摩擦学行为研究

合成了3种新型苯并三氮唑(BTA)阳离子功能化的离子液体，首先将3种离子液体作为0.5 M H₂SO₄溶液的缓蚀剂，利用电化学测试方法考察了对铜锡合金的缓蚀性能，电化学阻抗谱图和动电位极化曲线测试结果表明:3种离子液体均能够有效地抑制0.5 M H₂SO₄溶液对铜锡合金的腐蚀，起到较好的缓蚀效果. 考察了3种离子液体作为聚乙二醇(PEG)基础油添加剂时的摩擦学性能，结果表明:3种离子液体能够显著降低基础油的摩擦系数和磨损量，表现出较好的减摩抗磨性能. 利用SEM-EDS和XPS对磨斑进行了分析表征，发现摩擦化学产物和离子液体吸附膜构成的边界润滑膜是产生减摩抗磨效果的主要原因. 这种新型BTA阳离子功能化离子液体是一种兼具抗腐蚀性和优异摩擦学性能的多功能材料，在工业上具有非常广阔的应用前景. 

The Corrosion Inhibiting and Tribological Properties of Novel Benzotriazole Based Ionic Liquids

In present work, we synthesized three novel benzotriazole based ionic liquids firstly. The corrosion inhibiting properties were researched by electrochemical measurements using benzotriazole as corrosion inhibitors in 0.5 M H₂SO₄ aqueous solution. The results concluded from electrochemical impedance spectroscopy and potentiodynamic polarization curves indicated that three ionic liquids effectively inhibited the corrosion of bronze. Then three ionic liquids were utilized as additives in PEG base oil to probe the friction reducing and antiwear properties. Results indicate that three ionic liquids reduced the friction coefficient and wear volume of PEG base oil significantly, which further demonstrate excellent tribological performances of three ionic liquids. The worn surfaces were analyzed by scanning electron microscope and X-ray photoelectron spectrometer to probe the lubrication mechanisms. It was found that boundary lubricating film consisted of ionic liquids adsorption layer and tribochemical products was responsible for the excellent tribological properties. In summary, novel benzotriazole based ionic liquids were versatile materials with two outstanding abilities, i.e. corrosion inhibiting and lubricating properties, which were of considerable significance for application of ILs in industry.