Magnet Coating & Plating cutaway

Magnet Coating & Plating and Rust NiCuNi Cutaway

Plating NameColorTypical Thickness
Min. time
PCT (120°C, RH 100%, 200KPa)Salt Spray Test acc to ASTM- B117)
Max. Working Temperature (°C)PropertiesTypical application examples
Zn
White-blue
Color
Black
4-10um
24hrs
48hrs
12-24hrs
24-48hrs
120
120
120
Standalone coating with only one layerMotor magnets, automotive industries
Ni-Cu-Ni
Bright/Semi-Bright
Black
15-25um48hrs48-72hrs
200
200
Most common used coating, price beneficial, excellent against humidityConsumer goods, industries magnets, motors
AgSilver10-20um48-72hrs48-72hrs200High electric conductiveElectrical components
AuGold10-15um200Excellent wear resistance, high hardness, corrosion resistance, high conductivity, the gold layer is very thinDecorative
CuCopper10-20um200Slightly weaker abrasion and corrosion resistance than Ni-Cu-Ni
CrBright10-20um200Good abrasion & oxidation resistance, does not lose its shine in the atmosphere
EverlubeYellow>=10um72-120hrs72hrs160Superior ability of humid heatSpeakers, Industrial magnets
EpoxyAssorted Colors15-30um48hrs96-108hrs200High-corrosion resistance and chemical resistance, not shock-resistanctLinear motors, automotive, generators
NiCuEpoxyAssorted Colors25 – 45um16 – 30hrs168 – 1000hrs200
ParyleneClear3-10umN/A24hrs150High reliability, light weight, low coefficient of friction, high tensile, bio-compatibleMilitary & aerospace, commercial
PassivationLight Gray1-24-8hrs4-8hrs60Temporary ProtectionNormally used before over-molded or encased
Teflon (PTFE)White>=0.5mm72-120hrs120hrs260Non-stick, low coefficient of friction, non-wetting, high electrical strength, chemical resistance, 100% waterproofMedical, Food & Beverage
RubberBlack~0.5mmN/A96 – 108hrs135Excellent adhesion, abrasion and impact resistanceHolding magnets