Corrosion Products from Carbon Steel Formed in Compacted Bentonite under Reducing Conditions

Autor:	Xiaobin Xia, Takamitsu Ishidera, Kazuya Idemitsu, Yoshio Kikuchi
Rok vydání:	2008
Předmět:	Nuclear and High Energy Physics Materials science Carbon steel Metallurgy Radioactive waste Sorption engineering.material Corrosion Pore water pressure Nuclear Energy and Engineering Bentonite engineering Clay minerals Dissolution
Zdroj:	Journal of Nuclear Science and Technology. 45:763-772
ISSN:	1881-1248 0022-3131
DOI:	10.1080/18811248.2008.9711477
Popis:	For safety assessment of high-level radioactive waste disposal, the sorption of radionuclides on corrosion products that migrate from overpack material into compacted bentonite and the dissolution of corrosion products, which may cause the alteration of smectite to Fe-smectite due to the increase in Fe2+ concentration in the pore water, are possibly dependent on the kinds of minerals formed in compacted bentonite as corrosion products. In this study, carbon steel, previously corroded electrochemically under aerobic conditions, was left in contact with compacted Kunigel V1 and Kunipia F under reducing conditions for 3 to 4 years at room temperature. The corrosion products, which migrated from the carbon steel into compacted bentonite, were investigated by selective dissolution analysis, which can estimate the crystal-linity of Fe-bearing compounds, and by spectrophotometry to determine the valence of iron in the corrosion products. From these analyses, the corrosion products in compacted bentonite were ide...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::475a8dd6790c6d504d9d80da68678a58 https://doi.org/10.1080/18811248.2008.9711477 Zobrazit plný text záznamu