This can be
very important, especially for small currents and low voltages.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels. brownish
sulphide layer easily develops its surface.3
.5
Copper 0.4.5
Tin 0.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.061 16.069 14. 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.7.7.028 36
Gold 0. The parts are immersed aqueous passivation emulsion.1 Silver
The conductivity silver excellent, better than gold fact.067 15
Nickel 0.023 43.12 8. Silver produces moderate diffusion
barrier.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant. This
surface protection sufficient for almost all industrial connectors
applications. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.5
Silver 0.
This surface protection used for aggressive environments.7.
4.016 61
Zinc 0.
4.
4.7.4 The Specific Resistance and Conductivity Various
Materials
Table 4.2 Gold
The finest surfaces are created with gold plating.017 58
Brass (CuZn40) 0
