Bearing common major fault

The main fault of the sliding bearings:
1, tile surface corrosion: spectral analysis found abnormal concentrations of non-ferrous metal element; Bearing appears in submicron wear particles of many non-ferrous metals; lubricants excessive moisture, acid value exceeded.
2, surface corrosion journal: spectral analysis found abnormal concentrations of iron, bearings have many submicron particles of iron components, lubricants excessive moisture or acid value exceeded.
3, peeling tile surface: bearing find many fatigue spalling of large size alloy wear particles, layered abrasive grains.
4, tile back fretting: spectral analysis found abnormal concentrations of iron, iron-bearing components in many sub-micron wear particles, water and lubricating oil acid value exception.
5, the bearing surface strain: bearings were found to have cutting abrasive, abrasive component of non-ferrous metals.
6, the journal surface strain: bearing presence temper color or black abrasive cutting iron oxide particles, the metal surface.
7, the bearing bush-burning: bearing alloy grains have more large-size black and metal oxides.