7.
4. This can be
very important, especially for small currents and low voltages.5
Tin 0. This
surface protection sufficient for almost all industrial connectors
applications.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.7. The parts are immersed aqueous passivation emulsion.067 15
Nickel 0. Silver produces moderate diffusion
barrier.12 8.
4.023 43.017 58
Brass (CuZn40) 0.7.7.
This surface protection used for aggressive environments.4 The Specific Resistance and Conductivity Various
Materials
Table 4.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0. The contacts are silver-plated,
with layer thickness pm. 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.069 14.016 61
Zinc 0. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.028 36
Gold 0.061 16.5
Copper 0. brownish
sulphide layer easily develops its surface.4.
4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.1 Silver
The conductivity silver excellent, better than gold fact.3
.5
Silver 0
