4 The Specific Resistance and Conductivity Various
Materials
Table 4. This
surface protection sufficient for almost all industrial connectors
applications.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.
This surface protection used for aggressive environments. This can be
very important, especially for small currents and low voltages.5
Silver 0.
4.3
.12 8.7.1 Silver
The conductivity silver excellent, better than gold fact.
4. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.069 14. The parts are immersed aqueous passivation emulsion.4.017 58
Brass (CuZn40) 0.
4.067 15
Nickel 0.016 61
Zinc 0.5
Copper 0.5
Tin 0.7. brownish
sulphide layer easily develops its surface.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.061 16.7.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.7.2 Gold
The finest surfaces are created with gold plating. The contacts are silver-plated,
with layer thickness pm. Silver produces moderate diffusion
barrier.028 36
Gold 0.023 43. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area
