061 16.4 The Specific Resistance and Conductivity Various
Materials
Table 4. The contacts are silver-plated,
with layer thickness pm. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.069 14.4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels. This can be
very important, especially for small currents and low voltages.1 Silver
The conductivity silver excellent, better than gold fact.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.7.12 8.017 58
Brass (CuZn40) 0.5
Tin 0. brownish
sulphide layer easily develops its surface.
4.016 61
Zinc 0.7.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.
4. The parts are immersed aqueous passivation emulsion.2 Gold
The finest surfaces are created with gold plating.028 36
Gold 0.5
Silver 0.023 43. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.067 15
Nickel 0.7. This
surface protection sufficient for almost all industrial connectors
applications.3
. Silver produces moderate diffusion
barrier.
4.7.
This surface protection used for aggressive environments.5
Copper 0
