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have Considerable experience in the investigation and
repair of Accelerated Low Water Corrosion. The following
pages are designed to give specific information on a
variety of aspects of the phenomenon.
BS 6349 Part 1 Maritime
Structures (revised in 2000) section 7 materials, (particularly
clause 5.2.2) defines Concentrated Corrosion as being
‘local’ and ‘accelerated’ corrosion
in relation to ‘normal’ sea water corrosion.
The BS considers ALWC as one type of concentrated corrosion.
But the prevention of all types must be part of the
consideration of the safety and cost of construction
and repair of structures.
See British
Standards Institution
To illustrate the importance of the corrosion phenomenon,
it has in the past contributed to the loss of two thirds
of structural design life before major maintenance.
The affects have been known about since certainly the
1960s, but structures have been built, and may still
be being built, without adequate consideration being
given to prevention. There is now no need for the structures
to be damaged by any of the corrosion mechanisms, if
sufficient informed advice is sought and implemented.
For more details see:
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