brownish
sulphide layer easily develops its surface.7.1 Silver
The conductivity silver excellent, better than gold fact.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.12 8.7. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area. This
surface protection sufficient for almost all industrial connectors
applications.4 The Specific Resistance and Conductivity Various
Materials
Table 4.
This surface protection used for aggressive environments.5
Copper 0.4. Silver produces moderate diffusion
barrier.2 Gold
The finest surfaces are created with gold plating.7.067 15
Nickel 0.7.
4. The contacts are silver-plated,
with layer thickness pm.
4.028 36
Gold 0.
4.069 14. The parts are immersed aqueous passivation emulsion.017 58
Brass (CuZn40) 0.5
Silver 0.3
.061 16.5
Tin 0. This can be
very important, especially for small currents and low voltages.016 61
Zinc 0.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.023 43. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications
