机械杂质的含量多少,是考核润滑油是否合格的重要指标之一。但在测定方法上,不少单位(包括本厂在內)一直是采用滤纸法。此法消耗的溶剂(即汽油)较多,过滤和烘干所耗的时间都比较长。此外,烘干称量时常有负数出现至使测定的数字不可靠。为了克服上述的缺点,我们把原来的“滤纸过滤法”改为“玻璃坩埚过滤法”。通过反复试验和校对,取得了节省汽油、 The amount of mechanical impurities, is to assess whether one of the important indicators of lubricants. However, in the determination of methods, many units (including our factory) has been the use of filter paper. This method consumes more solvent (ie, gasoline), filtration and drying takes more time. In addition, there is often a negative number for drying the weighing to make the measured number unreliable. In order to overcome the above shortcomings, we changed the original “filter paper filter” to “glass filter crucible.” Through repeated tests and proofreading, has made the saving of gasoline,