Info Centre >> Fuel and Lube Oil Technical Manual >> 7. Lube Oil - Test Results >> 7.8 Spectrochemical Oil Analysis >> 7.8.8 Silver Plating; Tracer
General:
Some bearings and bushings; oil cooler solder; seals.
Silver is also used as a physical ‘tracer’ to indicate that wear has progressed to a certain point. In this application, silver is either plated directly onto a part surface or incorporated into a layer under the surface. The wear condition of the part can then be related to the amount of the tracer deposited in the oil.