Table 2. Typical Sources of Metallic In Lubricating Oils

DOE-STD-1052-93

TABLE 2

TYPICAL SOURCES OF METALLIC IN LUBRICATING OILS

Element

Typical Source

Aluminum

(Al)

Pistons, bearings, dirt, additives

Barium

(Ba)

Additives, water, grease

Boron

(B)

Coolant, additives, sea water

Calcium

(Ca)

Additives, water, greases

Chromium

(Cr)

Cylinders, rings, crankshafts, gears, coolant

Copper

(Cu)

Bearings, coolers, bushings

Iron

(Fe)

Cylinders, crankshafts, water, rust

Lead

(Pb)

Bearings, greases, gasoline, paint

Magnesium

(Mg)

Bearings, additives, sea water

Manganese

(Mn)

Valves, fuel, steel shafts

Molybdenum

(Ro)

Additives, rings

Nickel

(Ni)

Shafts, gears, rings, turbine components

Phosphorus

(P)

Additives, coolants, gears

Silicon

(Si)

Defoamants, dirt

Silver

(Ag)

Bearings, solder

Sodium

(Na)

Coolant, additives, sea water

Tin

(Sn)

Bearings, solder, coolers

Zinc

(Zn)

Additives, bearings, platings

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