1 Materials for air-termination and conductor
systems
The following materials are preferred for use extern-
al lightning protection systems: Hot galvanised steel,
rustproof steel, copper and aluminium. Points increased risk cor-
rosion, such insertion points into the concrete or
soil, must corrosion-protected. suitable coating
must applied corrosion protection connection
points the ground. connection between two different materi-
als that are not recommended joined re-
quired, bi-metal connectors can used.
Corrosion
A risk corrosion occurs especially when joining dif-
ferent material types.
Variable bi-metal quick connector with bi-metal intermedi-
ate plate (copper/aluminium)
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Chapter The external lightning protection system
. For this reason, copper parts
may installed above galvanised surfaces above
aluminium parts copper particles worn away by
rain other environmental influences can penetrate
the galvanised surface. addition, galvanic element
is created, which accelerates corrosion the contact
surface.
The following figure shows the use bimetal connect-
ors copper gutter which aluminium round
conductor attached.2.7
