不同碱值烷基苯磺酸钙的性能

针对添加不同碱值烷基苯磺酸钙清净剂的润滑油样品（简称油样），采用内燃机油成焦试验法、船用油水分离性能测定法、四球机试验法等考察其高温清净性、分水性能和极压抗磨性能。结果表明：随着清净剂碱值的增大，油样的高温清净性、分水性能和极压抗磨性能均得到提升。其中，油样的高温清净性和分水性能受清净剂由低碱值到高碱值变化影响较大，但受清净剂由高碱值到超高碱值变化影响较小；随着清净剂碱值的增加，油样的极压抗磨性能增强；清净剂碱性组分形成的摩擦保护膜，在低负荷下具有一定的极压抗磨性能，而在较高负荷下，摩擦保护膜的极压抗磨性能会减弱、甚至失效。

PERFORMANCE OF CALCIUM ALKYLBENZENESULFONATES WITH DIFFERENT BASE NUMBERS

For lubricating oil samples containing calcium alkylbenzenesulfonate detergent with different base numbers (referred to as oil sample), the high temperature detergency, water separation and extreme pressure & anti-wear properties were investigated by means of coke test of internal combustion engine oil, oil-water separation test of marine and four-ball machine test. The results show that with the increase of base number of detergent, the high temperature detergency, water separation property and extreme pressure & anti-wear property of oil samples are improved. Among them, the high temperature detergency and water-oil separation performance of oil samples are greatly affected by the change of detergent from low base number to high base number, but are less affected by the change of detergent from high base number to ultra-high base number. With the increase of base number, the extreme pressure & antiwear property of the oil sample is enhanced. The friction protective film formed by the alkaline components of detergent has a certain extreme pressure & anti-wear properties under low load, while the extreme pressure & anti-wear properties of the friction protective film will weaken or even fail under high load.