order guarantee the
long-term solderability (shelf life), brass
parts are given additional nickel
coating diffusion barrier.Materials Metals
Metals
Only materials that have proved
suitable for electrical engineering
applications are used Weidmüller
products.
The surfaces are usually given a
coating tin, which creates an
extremely good, “malleable” contact
with low contact resistance. The metal ions the zinc migrate
to the steel, which provides long-term
protection for the parent metal. the
presence electrolyte, zinc acts as
a cathode (i.
Zinc Zinc
Steel +
Crack
Elektrolyte
W
Technicalappendix
W.10 1282250000 2012/2013
. negative) with respect to
steel.
Solder connections are also given a
coating tin.
Conductive materials
The current-carrying materials copper,
brass and bronze are characterised
by their high conductivity and good
mechanical properties.
The selection, processing and surface
treatment all the metals used by
Weidmüller are carried out according
to the latest technical standards. Experience
gained from laboratory tests has
been incorporated into the design of
the surface protection.
The surface protection conforms to
the highest standards. All materials are subjected to
the rigorous quality control measures
of system certified DIN EN
ISO 9001.
The nickel coating provides effective
protection against the loss zinc
atoms from the brass. Zinc protects
against corrosion for long time even
after the zinc coating has been partially
damaged scratches pores.e. Environmental compatibility
plays crucial role the selection of
materials. Apart
from ensuring consistently good
electrical properties, the tin coating
provides excellent protection against
corrosion.
Steels
Steel parts required maintain
the contact force permanently are
electrogalvanised and treated with an
additional passivation technique
