2 Gold
The finest surfaces are created with gold plating. This can be
very important, especially for small currents and low voltages.
4.7. Silver produces moderate diffusion
barrier.5
Copper 0. The parts are immersed aqueous passivation emulsion. brownish
sulphide layer easily develops its surface.017 58
Brass (CuZn40) 0.
This surface protection used for aggressive environments.5
Silver 0.
4. This
surface protection sufficient for almost all industrial connectors
applications.12 8. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.7.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.3
.016 61
Zinc 0. The contacts are silver-plated,
with layer thickness pm. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.061 16.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.069 14.7.
4.023 43.1 Silver
The conductivity silver excellent, better than gold fact.028 36
Gold 0.7.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.067 15
Nickel 0.5
Tin 0.4.4 The Specific Resistance and Conductivity Various
Materials
Table 4
