Case studies from Shipbuilding in Adelaide

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Based in Osborne, South Australia ASC builds and maintains Australia’s frontline naval ships and submarines to world class performance and quality standards. The location of the ASC Shipyard on the Port River presents some challenging conditions for the prevention of corrosion due to the nature of the water.

One of the key areas of focus in shipbuilding and maintenance is the prevention of corrosion in internal seawater pipework. As systems are shut down or in the process of being set to work, they do not see the flow patterns that the pipework would normally see in service and this contributes to the corrosion. In addition to this, ASC, like many other shipyards, is located in an estuarine waterway where the water quality is significantly lower than the water in the open ocean where the ships normally operate.

During the course of the construction and maintenance of various vessels ASC has had to combat a number of different corrosion issues, these include selective phase corrosion in nickel aluminum bronze, welding corrosion in Monel alloys, stray current corrosion and dissimilar metal corrosion. ASC has successfully managed to combat these types of corrosion after their appearance and the incidence of corrosion related failures has significantly reduced under management strategies that have been put in place.

This paper will outline some case studies of corrosion in the shipbuilding industry and the solutions implemented.

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