4 The Specific Resistance and Conductivity Various
Materials
Table 4. brownish
sulphide layer easily develops its surface.028 36
Gold 0.016 61
Zinc 0. The parts are immersed aqueous passivation emulsion.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.5
Tin 0.7.12 8. This can be
very important, especially for small currents and low voltages.
4. The contacts are silver-plated,
with layer thickness pm.7. Silver produces moderate diffusion
barrier.067 15
Nickel 0.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.4. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.7.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.5
Silver 0.061 16.023 43.7.
This surface protection used for aggressive environments.069 14.017 58
Brass (CuZn40) 0.2 Gold
The finest surfaces are created with gold plating.5
Copper 0.1 Silver
The conductivity silver excellent, better than gold fact.
4. This
surface protection sufficient for almost all industrial connectors
applications.
4.3
