Part 1. The Nature of Corrosion and Its Control. Tanker vessels operated in salt water have developed serious bulkhead failures in 6 to 8 years of clean trade when frequent cleaning is required. Estimating tanker service as one-half each in clean and dirty trade, the author says partial renewal of deck, shell and bottom plating, including some longitudinals, plus complete renewal of internal structure of cargo space would cost $1,000,000 for 500 cargoes between Gulf/North of Hatteras. Figures are given on actual percentage and dollar damage resulting from tanker corrosion. Elements of tankers most subject to corrosion damage are enumerated and illustrated and design remedial measures discussed.
Methods of corrosion control are enumerated and some experience with the several methods' considered. Means of protecting cargo space by treating cargo, cathodic protection, inhibition, dehumidification, deoxidation are reviewed. The advantages of adding extra metal to members subject to greatest corrosion losses are explained and dollar savings given.
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(*Note: This abstract was not a part of the original publication of Part 1.)
