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在对汽车的维修当中,经常发现活塞表面有与缸体母线平行的划痕,曲轴的主轴瓦和连杆轴瓦上出现平行于机油道的深槽,曲轴主轴颈和连杆轴颈明显地磨损,其磨损的痕迹形状类似轴瓦,轴瓦上覆盖一层粗糙的暗膜。汽车的减速器、变速器以及液压机械传动装置中也有轴颈表面“长癣”的现象等。究其原因,除润滑的问题(如油的质量问题或少油及油脏的问题)以外,汽车车身电池电流及外电流也会造成这种电腐蚀现象。
In the maintenance of the car, the piston surface is often found parallel to the cylinder block scratches, crankshaft main bearing bush and connecting rod bearing bush appears parallel to the deep groove, crankshaft main journal and connecting rod neck wear significantly , Its wear traces similar to the shape of bearings, bush covered with a layer of rough dark film. Automobile reducer, transmission and hydraulic mechanical transmission also have the journal surface “long ringworm” phenomenon. The reason, in addition to lubrication problems (such as the quality of oil or less oil and dirty oil issues), the car body battery current and external current can also cause this phenomenon of electric corrosion.