This surface protection used for aggressive environments.017 58
Brass (CuZn40) 0. Silver produces moderate diffusion
barrier.
4.4.7.7.061 16.5
Copper 0.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant.
4.
4.5
Silver 0. brownish
sulphide layer easily develops its surface.016 61
Zinc 0.023 43.3
.069 14.2 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.028 36
Gold 0. This
surface protection sufficient for almost all industrial connectors
applications. This can be
very important, especially for small currents and low voltages.12 8.4 The Specific Resistance and Conductivity Various
Materials
Table 4.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.7. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.5
Tin 0. The parts are immersed aqueous passivation emulsion.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.067 15
Nickel 0. The contacts are silver-plated,
with layer thickness pm.7.1 Silver
The conductivity silver excellent, better than gold fact
