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Wear Metals Origins for Engines

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Element Origins

Chromium

Wear metal (rings, bearings, liners, exhaust valves); chromate coolant treatment

Copper

Wear metal, anti-wear additive in some oils

Iron

Wear metal (cylinder walls, valve train parts, gears, rust, oil pump)

Lead

Wear metal (babbit overlay); contaminant from leaded gasoline

Tin

Wear metal (piston plate coating, babbit overlay of connecting rod and crankshaft main bearings)

Aluminum

Wear metal (valve train parts, pistons)

Antimony

Wear metal (babbit overlay)

Cadmium

Wear metal

Magnesium

Wear metal (can replace typically aluminum components in aircraft engines, traces in aluminum alloy); dispersant or detergent additive in lube oil; from hard water

Molybdenum

Wear metal (anti-wear coating on some piston rings); lube oil friction modifier

Nickel

Wear metal (shafts, valves, anti-friction bearings, valve guide wear)

Silver

Wear metal (anti-friction bearings, silver solder, wrist pin bushings)

Titanium

Wear metal


Contaminants

Aluminum

Wear metal, aluminum silicate from ingested sand or dust

Chromium

Wear metal, chromate coolant treatment

Lead

Wear metal, contaminant from leaded gasoline

Silicon

Anti-foaming or inhibitor additive to lube oils; from silicone gaskets, silicon dioxide from ingested sand or dust

Barium

Detergent or dispersant additive in lube oils; smoke depressant additive in diesel fuels

Boron

Sodium borate additive in some antifreeze; lube oil additive

Calcium

Dispersant or detergent additive in lube oils; component of some road salts; from hard water

Magnesium

Dispersant or detergent additive in lube oil; from hard water

Sodium

Dispersant or detergent additive in lube oil; from sodium borate or sodium chromate additive in antifreeze and road salt


Additives

Silicon

Anti-foaming or inhibitor additive to lube oils; from silicone gaskets, silicon dioxide from ingested sand or dust

Barium

Detergent or dispersant additive in lube oils; smoke depressant additive in diesel fuels

Boron

Sodium borate additive in some antifreeze; lube oil additive

Calcium

Dispersant or detergent additive in lube oils; component of some road salts; from hard water

Copper

Anti-wear additive in some lube oils

Magnesium

Dispersant or detergent additive in lube oil; from hard water

Molybdenum

Lube oil friction modifier

Phosphorus

Corrosion inhibitor additive in lube oils

Sodium

Dispersant or detergent additive in lube oil; from sodium borate or sodium chromate additive in antifreeze and road salt

Zinc

Anti-wear and inhibitor additives in lube oils


THIS INFORMATION IS SUPPLIED AS A GUIDE ONLY. TO RECEIVE THE MAXIMUM BENEFITS FROM THIS PROGRAM, USE THIS INFORMATION IN CONJUNCTION WITH YOUR OWN MAINTENANCE PRACTICES.





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