brownish
sulphide layer easily develops its surface.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.5
Tin 0.
4.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.
4. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.017 58
Brass (CuZn40) 0.028 36
Gold 0.069 14.4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.2 Gold
The finest surfaces are created with gold plating.7.7.7.12 8.061 16.1 Silver
The conductivity silver excellent, better than gold fact. The contacts are silver-plated,
with layer thickness pm.023 43.067 15
Nickel 0. This can be
very important, especially for small currents and low voltages.
This surface protection used for aggressive environments.4 The Specific Resistance and Conductivity Various
Materials
Table 4.7. Silver produces moderate diffusion
barrier.5
Copper 0.5
Silver 0.
4. This
surface protection sufficient for almost all industrial connectors
applications.016 61
Zinc 0.3
. The parts are immersed aqueous passivation emulsion
