This report is the final product of an investigation of ballast and cargo corrosion and the use of corrosion control alternatives on board crude oil and refined petroleum product carriers. To obtain data, a survey of ship operators, coating and anode manufacturers, shipyards and contractors, consultants and published literature was conducted. Key factors affecting corrosion and corrosion protection costs are identified. The relative effectiveness of coatings, sacrificial anodes and full scantlings is evaluated for different tank conditions. A method of life-cycle cost analysis for various tank conditions and the results of sensitivity studies on two representative ship designs are presented. These analyses are used to examine traditional corrosion-control philosophy in light of modern day tanker developments. It was found that it is not normally advantageous to reduce scantlings in fully protected cargo tanks and that a partially coated crude oil tank will experience lower life cycle costs than one fully coated. The main intent of this report is to provide tanker owners and designers with a rationale for selecting an optimum corrosion-control system for a specific vessel by providing a better understanding of the factors which influence both tank corrosion and the cost of corrosion protection.
Investigation of internal corrosion and corrosion-control alternatives in commercial tankships
Untersuchung der internen Korrosion auf Tankschiffen und alternative Moeglichkeiten des Korrosionsschutzes
US Government Reports ; Jul ; 1-174
1981
174 Seiten
Report
English
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