This can be
very important, especially for small currents and low voltages.7.023 43.7.2 Gold
The finest surfaces are created with gold plating.5
Silver 0.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.5
Tin 0. This
surface protection sufficient for almost all industrial connectors
applications.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0. brownish
sulphide layer easily develops its surface.3
.
4. The contacts are silver-plated,
with layer thickness pm. Silver produces moderate diffusion
barrier. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.017 58
Brass (CuZn40) 0.
4.4 The Specific Resistance and Conductivity Various
Materials
Table 4.067 15
Nickel 0.016 61
Zinc 0.061 16.069 14.12 8.028 36
Gold 0.7.
4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.
This surface protection used for aggressive environments. 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.7.5
Copper 0.1 Silver
The conductivity silver excellent, better than gold fact.4
