The U.S. Navy has used galvanized steel ducting in Surface Ship ventilation systems for many years. Overall performance of this material in service has been acceptable, but excessive corrosion has been observed at weather openings and at locations where water collects. The corrosion observed could be attributed to design problems, such as improper placement of weather intakes and lack of low point drains, or to use of a ducting material which is incompatible with the service environment Besides the cost associated with ducting replacements, seawater ingestion and duct corrosion can cause personnel hazards from projected debris and electrical arcs at switchboards. This paper discusses the various configurations and design issues considered in recent corrosion control evaluations of these systems. The benefits and problems associated with material options, including stainless steels, textiles, and composites, is discussed. A cost benefit analysis for some of these options is included.

Subject
Costs, Preservation, Marine environments, Materials, Materials performance, Installation, Ventilation, Galvanized steel, Composites, Marine vessels, Titanium, Stainless steel, Maintenance
Keywords:
ventilation, ducting materials, weather intakes
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1999
GOV
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