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在150ZN基础油中,用四球试验的五个指标考察了七种粘度指数改进剂对六种油性极压剂的润滑性影响。结果证明多数粘度指数改进剂可提高油性极压剂的综合磨损值。
In the 150ZN base oil, the influence of the seven viscosity index improvers on the lubricity of the six kinds of oily extreme pressure agents was investigated by four indexes of four-ball test. The results demonstrate that most viscosity index improvers increase the overall wear value of oily extreme pressure agents.