Abstract
There are about 80, 000 above ground tanks for oil storage in Japan. Most tanks are constructed in a coastal industrial zone, therefore, corrosive environment is not mild. More than 50 leakage accidents in these tanks were reported in 2003 and about 60% of them are due to corrosion. In this report, recent trends of accident due to corrosion are described as follows. (1) Tendency of leakage accidents due to corrosion. (2) Relationship between corrosion rate and used years. (3) Introduction of recent research on evaluation of corrosion damage and protection for bottom plates.
