Silver produces moderate diffusion
barrier.
4.5
Copper 0.5
Silver 0.
This surface protection used for aggressive environments.017 58
Brass (CuZn40) 0.3
.
4. The parts are immersed aqueous passivation emulsion.7.1 Silver
The conductivity silver excellent, better than gold fact.7.023 43.5
Tin 0.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.12 8.2 Gold
The finest surfaces are created with gold plating. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area. brownish
sulphide layer easily develops its surface. This can be
very important, especially for small currents and low voltages.016 61
Zinc 0.4 The Specific Resistance and Conductivity Various
Materials
Table 4.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.
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.028 36
Gold 0.4. This
surface protection sufficient for almost all industrial connectors
applications.7.067 15
Nickel 0.7.061 16.069 14
