Special cases where galvanic corrosion can
occur in the water industry are reservoirs, wells,
filtration plants and other installations for drinking
water production and waste water treatment
plants. Most of these facilities are older and
have been updated at regular intervals. They
may contain bare or coated cast iron pipes,
coated nodular iron and steel pipes, concrete
with carbon steel reinforcing, hot dip galvanised
components and, because of continuous danger
of corrosion, piping and tubing, pressure doors
and frames, ladders, service platforms,
handrailing, floor fittings and drain pipes made of
stainless steel. In order to control galvanic
corrosion in such mixed installations a detailed
analysis of the situation will allow the definition
of appropriate measures to be taken as
discussed in this paper.