On the Steel Plate Thickness Decrease Due to Corrosion in Ships and Offshore Structures
Relating to the oil spill accident at Japan Sea by Russian tanker Nakhodka in January 1997, steel plate thickness decrease of ship hull due to corrosion was discussed from view point of navigation safety. At first, results of Investigation Committee of Nakhodka accident by Ministry of Transport were shown. Then relation between causes of accidents and decrease in plate thickness was introduced from data of NK (Classification Society of Japan). And examples of plate thickness measurement data in long life ship were shown and the influence of plate thickness decrease to the strength of ship hull was discussed. At last, ships of “flag of convenience” were discussed from view point of international safe navigation of ships.