| Nuttall
John Martin has a pre-eminent position in UK as a practitioner
in the inspection, repair and control of marine corrosion
on structures, often using NJM’s unique Limpet
Dam technology. These are dry working environments providing
direct access for inspection, repairs and welding to
partially immersed structures.
NJM has offered cost-effective solutions to corrosion
of marine structures since the 1980s. Previously it
had been thought that the maximum corrosion rate occurring
in the marine environment occurred above water level
and was easily monitored and treated or repaired. It
became clear, however, that microbially induced or assisted
corrosion (familiar to the petrochemical and shipping
industries) occurring generally at low water levels
was not included in the normal design literature, and
had been ignored. The corrosion had corrosion rates
perhaps an order of magnitude greater than normal marine
corrosion. The result was that structures designed for
60 or even 100 years life without particular corrosion
protection not only required such prevention, but also
required repair after comparatively few years.
NJM introduced their Limpet
Dam to give unique access to the attack sites on all
sorts of structures.
As part of their commitment to spreading understanding
of the phenomenon NJM also provide some pages on Accelerated
Low Water Corrosion (ALWC)
which it is hoped will be both informative and useful.
NJM's Technical Manager has also participated in the
preparation of two publications in 2005 (PIANC
and CIRIA) aimed at aiding the management of ALWC prevention
and control.
For more details see:
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