5
Copper 0.067 15
Nickel 0. brownish
sulphide layer easily develops its surface.
This surface protection used for aggressive environments. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special 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. The parts are immersed aqueous passivation emulsion.7.7.7.016 61
Zinc 0.5
Silver 0. This
surface protection sufficient for almost all industrial connectors
applications.
4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.
4.023 43. Silver produces moderate diffusion
barrier.7. The contacts are silver-plated,
with layer thickness pm. This can be
very important, especially for small currents and low voltages.4 The Specific Resistance and Conductivity Various
Materials
Table 4.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.
4.028 36
Gold 0.4.1 Silver
The conductivity silver excellent, better than gold fact.3
.017 58
Brass (CuZn40) 0.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.2 Gold
The finest surfaces are created with gold plating.069 14.061 16.5
Tin 0
