Comparison of X-ray CT measurement for large size iron artifact

Hayashi, Maki*; Yoshikawa, Hideki

Corrosion analysis have carried out on forty iron-based archaeological remains, which had been dug out at seventeen relics in Japan. Although JAEA estimated the corrosion amount of the carbon steel to be 31mm for 1000 years by the second progress Report (H12), this analysis clarified the corrosion amount of the iron-based archaeological remain was lower than 31mm. Most of iron-based archaeological remains for this analysis had been buried in a oxidizing environment. Because the disposal environment is expected to be reducing condition, the corrosion data in conditions relevant for geological disposal are desirable. The purpose of this study is to investigate the corrosion of the soil solid sample that contains the plow excavated from the Oda castle. We want to use medical X-ray CT owned in the JAEA for metal natural analogue study. Therefore, same sample were measured by high energy industry machine for industry and medical X-ray tomography. And the comparison of each X-ray CT Image and measurement of thickness of rust were performed.