311 核破砕中性子散乱施設用ターゲット容器材料の水銀腐食に関する研究

概要

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In a MW-class neutron scattering facility, merculy target will be used as a neutron source. In the case of a low compatibility between mercury and the target vessel material, mercury corrosion will be enhanced to decrease a structural strength of the target vessel. Furthermore, since the target vessel would have a negative potential in the case of an induction of a proton beam charged a positive potential, the target vessel material would be easily ionized to dissolve into the mercury. Therefore, the corrosion would be enhanced by an electro-chemical reaction. Then, the mercury corrosion tests of the Type 316L stainless steel, a candidate material for the target vessel, with or without the electro-chemical reaction were carried out under a temperature condition of about 200℃ in order to clarify the mercury corrosion behavior. After the corrosion test without the chemical reaction, the mass changes and the surface changes were not observed, although a hardness of the surface was increased. After the test with the electro-chemical reaction, the extreme surface changes were observed at the edge of the specimen and the areas that had initial defects.
一般社団法人日本機械学会の論文
2000-09-08