067 15
Nickel 0.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.4. This
surface protection sufficient for almost all industrial connectors
applications.
4.061 16.
4.5
Tin 0.1 Silver
The conductivity silver excellent, better than gold fact.5
Silver 0.7.016 61
Zinc 0. 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.4 The Specific Resistance and Conductivity Various
Materials
Table 4.2 Gold
The finest surfaces are created with gold plating.7.5
Copper 0.069 14.3
. 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.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant. Silver produces moderate diffusion
barrier.7. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.017 58
Brass (CuZn40) 0.023 43.
4. brownish
sulphide layer easily develops its surface. The contacts are silver-plated,
with layer thickness pm.12 8.028 36
Gold 0.
This surface protection used for aggressive environments
