Calorex Pro-Pac PPT45EHC - Electrolytic Corrosion in Swimming Pools

5.0 ELECTROLYTIC CORROSION IN SWIMMING POOLS
Electrolytic corrosion will occur when dissimilar metals at are in
contact wi each oer create a potential difference between
emselves. Sometimes separated by a conductive substance known
as an electrolyte, e dissimilar metals will create a small voltage
(potential difference) at allows e ions of one material to pass to e
oer.
Just like a battery, ions will pass from e most positive material to e
more negative material.
Anying more an 0.3 volts can cause e most positive material to
degrade.
A swimming pool wi its associated equipment can create is effect.
The pool water being an ideal electrolyte and components of e
filtration circuit, heating system, steps, lights etc providing e dissimilar
metals needed to complete e circuit.
Whilst ese small voltages are rarely a safety reat ey can create
premature failure rough corrosion. Not dissimilar to corrosion rough
oxidation, electrolytic corrosion can cause complete failure of a metallic
material in a very short period of time.
In order to prevent is type of corrosion all metallic components in
contact wi swimming pool water should be bonded togeer using
10mm² bonding cable. This includes non-electrical items such as metal
filters, pump strainer boxes, heat exchangers, steps and handrails. It
is highly recommended at bonding be retrofitted to existing pools,
which may not be protected by is system.
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SD566250 ISSUE 35