4.023 43.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.
This surface protection used for aggressive environments.5
Copper 0.028 36
Gold 0. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.4 The Specific Resistance and Conductivity Various
Materials
Table 4.
4.067 15
Nickel 0.2 Gold
The finest surfaces are created with gold plating. brownish
sulphide layer easily develops its surface.7. The contacts are silver-plated,
with layer thickness pm. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.12 8.
4.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.5
Tin 0.069 14. This
surface protection sufficient for almost all industrial connectors
applications.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.7.7.017 58
Brass (CuZn40) 0.
4. This can be
very important, especially for small currents and low voltages. The parts are immersed aqueous passivation emulsion.1 Silver
The conductivity silver excellent, better than gold fact.061 16.016 61
Zinc 0.7.5
Silver 0.3
. Silver produces moderate diffusion
barrier
