In the anoxic conditions of nuclear waste deep geological repository, the main iron corrosion products formed at the surface of the carbon steel overpacks are siderite (FeIICO3) and magnetite (FeIIFeIII2O4) that form a rather protective layer. The originality of this work is the consideration of the bacterial metabolism of nitrate-reducing bacteria (NRB), often overlooked in corrosion processes. Klebsiella mobilis was used as a model of NRB and incubated with ferrous carbonates/magnetite corrosion bilayers under anoxic conditions. As a consequence of a combination of biotic and abiotic processes magnetite was reduced to mackinawite (FeIIS) and subsequently transformed to greigite (FeIIFeIII2S4).

中文翻译：

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硫化物物种对磁铁矿的非生物或微生物介导的转化：硝酸盐还原菌的不可预见的作用

在核废料深地质处置库的缺氧条件下，碳钢外包装表面形成的主要铁腐蚀产物是菱铁矿（FeIICO3）和磁铁矿（FeIIFeIII2O4），形成了相当保护层。这项工作的独创性是考虑了硝酸盐还原菌 (NRB) 的细菌代谢，这在腐蚀过程中经常被忽视。运动克雷伯氏菌被用作 NRB 的模型，并在缺氧条件下与碳酸亚铁/磁铁矿腐蚀双层一起培养。作为生物和非生物过程结合的结果，磁铁矿被还原为马其诺矿 (FeIIS)，随后转变为灰辉石 (FeIIFeIII2S4)。