Wear Metals and Metal Contaminants in Lubricating Oils

5 Wear Metals and Metal Contaminants in Lubricating Oils [3] 

Ductile, good thermal and electrical conductance Alloy with Cu + Pb for sacrificial bearing linings Light metal, resistance to corrosion and temperature Added to increase hardness and corrosion resistance Used for sacrificial wear surfaces, babbits Silicon presence as contaminant, abrasive properties on engine Reduces friction, good thermal and bearing plate, susceptible to Zn based additives 

Wear metals from engine block Wear metal, lube friction modifier 

Corrosion inhibitor may indicate coolant leakage, ingested road salt, sea salt, antifoaming agents 

Corrosion and rust inhibitor, dispersant, detergent, antiwear, alloy bearing, etc. 

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