Hydraulic oils – Typical taminants, add

Wear

AluminiumAl25 Si, Na, K, CuDie-cast parts, aluminium bronze, pump casings, guide mechanisms, plain bearings, oil coolers, multiple disc clutches, sealing rings <2 -no significan

Antimony*Sb3 Zn, Pb, Cu‚Hardened lead‘ (lead antimony alloys) and tin alloys in plain bearings, white metal bearings <2 -no significan

BariumBa2 -Not a wear-induced metal in hydraulic oils 50–8000 S, PType A ATF ( a

BerylliumBe3 CuSintered metal bearings, Cu-Be alloys, ceramic components <2 -no significan

LeadPb10 Cu, Sn, WPlain bearing running surface, pump casing, solder joints, rolling bearing cages <30 S, PFriction-redu inhibitor in lu

BoronB12 Fe Ceramic components, insulation bodies, brake and clutch linings <40 -Cleaning sup

Cadmium*Cd3 NiCorrosion-resistant Ni-Cd alloy <2 -no significan

ChromeCr25 Fe, Cu, AlRolling bearings, vanes of vane pumps, chrome plated piston rods, pump raceway, other chrome plated components <2 -no significan

Chlorine*Cl20 Fe, Cr Abrasion of PVC plastic parts <2 -no significan

IronFe50 Cu, Cr, MnHydraulic pump, hydraulic motor, valves, pistons, rolling bearings, tubing, casings, pipes, tank, cutting-ring fi ttings <2 -no significan

PotassiumK15 Al, Si, NaDie-cast parts of light-metal alloys <2 -no significan

CalciumCa5 V, Clrare alloy constituent, aggregate in PVC <3000 P, Zn,SDetergent in also in lubric

Cobalt*Co2 -Not a wear-induced metal in hydraulic oils <2 -no significan

CopperCu25 Fe, Pb, Al Brass and bronze parts, control discs, pressure plates, pipes, oil coolers, rolling bearing cage, sealing and guide rings <2 -no significan

Lithium*Li3 Al, Mg, FeLight metal alloys in aviation hydraulics <2 -no significan

MagnesiumMg5 Al, Fe, VLight-metal alloys for die-cast parts <1500 Ca, P, Zn, SDetergent in ManganeseMn3 Fe, CuSteel, high-grade steel, non-ferrous-metal alloys <2 -no significan

MolybdenumMo5 Fe, MnPump and valve parts made of high-strength alloys <250 -Molybdenum

SodiumNa25 Al, Si, KDie-cast parts with light metal alloys <300 Ca, Mg, Zn, P, S rare additive

NickelNi3 Fe, MnNickel-plated supporting cores of filters, alloy constituent for valves, gearwheels <2 -no longer sig PhosphorusP10 Fe, CuAbrasion of phosphated (hardened) surfaces, phosphorus bronze <2000 Zn, SAttrition and oils

SulphurS30 Fe Rare alloy constituent, abrasion of rubber or plastic materials <10,000 P, ZnWear-inhibiti

Silver*Ag3 Fe, CuArgentiferous solder joints <2 -no significan

SiliconSi10 Al, CuAbrasion of light metal alloys, silicon seals <15 Ca, Mg, Zn, PAnti-foam ad

Titanium*Ti3 FeHigh-strength steels in special hydraulic systems, springs on check valves, level indicators, ceramic parts <2 -no significan

Vanadium*V3 Fe, AlChrome vanadium steel, titanium vanadium aluminium alloys <2 -no significan

Tungsten*W3 Mo, FeTool steel of W-Mo-Fe for high-strength parts <2 -no significan

Elements marked with * appear in standard laboratory reports for hydraulic oils only for values over 1 mg/kg (1ppm)

ZincZn70 Fe, Cu, AlOil corrosion on zinc-coated components (zinc-free oils) <1500 P, SWear-inhibiti resistance

TinSn25 Cu, Fe, PbConstituent of tin bronze, tin solder of cooler joints <300 PIn some synt