A Sampling Method and Data Evaluation of Archaeological Samples to Support Long-Term Corrosion Prediction

Yoshikawa, Hiroyuki; Lee, S.; Matsui, Toshiya

doi:10.5006/1.3319130

Cited by 8 publications

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“…In addition, it has been believed that burying iron together with human bones and animal bones causes vivianite formation, because phosphate is necessary for its formation [9]. As the presence of iron reducing bacteria was confirmed by incubation of the soil with excavated iron remains [11], it maybe causes the reduction of magnetite by the bacteria and the iron remains were corroded. Some excavated iron remains are covered with magnetite.…”

Section: With Bacteria Without Bacteria Start 7 Days 41 Days Start 7 mentioning

confidence: 99%

Biomineralization of Vivianite on the Carbon Steel Surface Attacked by the Iron Reducing Bacteria

2010

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Experiments were carried out to investigate the corrosion and mineralization of carbon steel samples exposed to iron reducing bacteria cultured in a liquid medium. Specifically iron reducing bacteria were cultured under static conditions for 41 days with carbon steel samples. The result showed that a complex (biofilm, bacteria, etc.) was generated by the bacteria and covered the surface of the carbon steel sample. By using a microscope, the corrosion products were revealed to be formed of green and white crystals, or needle-shaped and lozenge crystals by SEM observation. The crystals were vivianite (Fe 2+ 3 (PO 4 ) 2 ・8H 2 O) measuring 50~250 μm. In a corrosion process of an iron material surface, ferrous ion (Fe 2+ ) is dissolved from the iron in a cathode reaction, and generates Fe 3+ oxide as corrosion product. It appears that vivianite can be also generated as corrosion product in an environment rich in Fe 2+ and phosphate by activity of the iron reducing bacteria. Some data on the morphological feature of these corrosion products were obtained.

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Section: With Bacteria Without Bacteria Start 7 Days 41 Days Start 7 mentioning

confidence: 99%

Biomineralization of Vivianite on the Carbon Steel Surface Attacked by the Iron Reducing Bacteria

2010

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“…The primary candidate material for the overpack is carbon steel and its stability has been studied. [1][2][3][4] The overpack containing vitrified waste will be placed in a deep underground which is regarded as an anaerobic environment where iron reducing bacteria can inhabit. Iron reducing bacteria works with the energy generated when it reduces Fe(III) ion in the pore water in soil to Fe(II) ion.…”

Section: Introductionmentioning

confidence: 99%

Study of microbial corrosion behaviour of carbon steel both in alkaline liquid medium and liquid medium with anions

Lee¹,

Matsui

Yoshikawa

2014

Corrosion Engineering, Science and Technology

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It is believed that iron reducing bacteria can be active in a deep underground where the overpack will be placed, being in a reducing condition with less oxygen or anaerobic environment. A buffer material (such as bentonite) surrounding the overpack will react with groundwater to produce alkaline pore water. We need some information to judge whether the iron reducing bacteria would be a factor to promote the corrosion of the overpack if iron reducing bacteria inhabits in alkaline condition. Also, it is very important to evaluate effect of anions, which promote corrosion of the carbon steel on growth of iron reducing bacteria and on the corrosion behaviour of carbon steel. In this study, we conducted microbial corrosion experiments of carbon steel both in an alkaline liquid medium and in a liquid medium with anions. The results indicate that iron reducing bacteria can be active, even where it is in alkaline conditions with or without anions.

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“…En Suisse, la NAGRA reprend une synthèse bibliographique des études effectuées sur la corrosion en milieu anoxique [18]; dans ce rapport, les mesures de vitesses de corrosion à partir d'objets archéologiques constituent l'une des approches proposées. Le centre d'étude nucléaire japonais, quant à lui, a effectué une revue bibliographique des études portant sur les objets archéologiques afin de mettre en place une méthode de prélèvement adaptée à la mesure de vitesse de corrosion [22]. Les réactions anodiques et cathodiques impliquent des transferts de charges entre un conducteur électronique (le métal) et un conducteur ionique (la solution aqueuse).…”

Section: I16 Etude Phénoménologique Et Prévisionunclassified

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A Sampling Method and Data Evaluation of Archaeological Samples to Support Long-Term Corrosion Prediction

Cited by 8 publications

References 1 publication

Biomineralization of Vivianite on the Carbon Steel Surface Attacked by the Iron Reducing Bacteria

Biomineralization of Vivianite on the Carbon Steel Surface Attacked by the Iron Reducing Bacteria

Study of microbial corrosion behaviour of carbon steel both in alkaline liquid medium and liquid medium with anions

Gestion des déchets radioactifs

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