塗装によるカーゴオイルタンクの防蝕について

抄録

As the corrosion prevention of cargo oil tanks, we have in shipyard many methods and techniques, for example ; Galvanic anticorrosion system, painting method, inhibitor method etc,. Recently cargo oil tank coating is recognized as one of powerful means for corrosion margin control by ship owners, builders and classification societies. Some test was done to find what kind of paints were suitable to prevent corrosion of cargo oil tank, when we apply the painting method. In the laboratory we have done two week cyclic immersion tests of paints in 60℃ crude oil and 35℃ sea water for 18 months and furthermore we investigated it in actual tanks of the SHINANOGAWA MARU, CHIKUMAGAWA MARU and YAMATOGAWA MARU (Kawasaki Line) about one year. According to the results of these tests Polyurethane, Vinylidenchloride, Epoxy and Epoxy coaltar paints showed good results and Zinc silicate, Zinc styrole, Polyvinylchloride paints showed poor results. Taking into cosideration of working properties, recoating properties in repairing dock and painting cost, we can conclude that Epoxy coaltar paint is the most favourable paint for cargo oil tank coating.