Abstract
Characteristic failures that have occurred in heat exchangers, condensers, sea-water circulating pumps, valves and pipework aboard vessels are described. Consideration is given to the causes of these failures and it is shown that a number of factors are involved, in particular the design of the equipment, the selection of the materials of construction and the quality of workmanship.
Possible solutions to these problems are discussed and it is suggested that many premature failures could be avoided if the materials of construction were selected more carefully and when supplied always met the specified standards. Some protective systems designed to combat corrosion have been evaluated and a unit has been designed to inject predetermined amounts of ferrous sulphate solution into sea-water cooling systems. This unit has been fitted on board several vessels where it has operated reliably and the injection of ferrous sulphate has combated impingement attack.
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