The interactions between copper, the canister material in the nuclear waste disposal concept in Finland and Sweden, and micro-organisms in groundwater in their expected near-field environment are the core interest of this paper. Copper specimens were incubated with ammonia-oxidising bacteria for different time periods and then subjected to electrochemical measurements and surface characterisation to provide data on biofilm formation and its effects on copper corrosion. The biofilms on the surface of copper specimens were heterogeneous, due to the morphology of corrosion products that developed during the biofilm growth phase, but they also contributed to the nature and amount of corrosion product layers on the copper surfaces. Nitrogen was systematically detected in the biofilm specimens, due to the presence of ammonia-oxidising bacteria. The electrochemical response of the specimens was so heavily linked with the detected corrosion products, often rich in chlorine from the groundwater, that the influence of ammonia-oxidising bacteria was masked. The results demonstrate that the role that biofilm formation plays in the corrosion of copper in groundwater environment is very difficult to predict even under controlled laboratory conditions.

中文翻译：

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含氧地下水中铜与微生物相互作用的实验室研究

铜，芬兰和瑞典的核废料处置概念中的罐材料以及预期的近场环境中的地下水之间的相互作用是本文的核心兴趣。铜标本与氨氧化细菌孵育不同的时间，然后进行电化学测量和表面表征，以提供有关生物膜形成及其对铜腐蚀影响的数据。铜标本表面的生物膜是异质的，这是由于在生物膜生长阶段形成的腐蚀产物的形态所致，但它们也有助于铜表面腐蚀产物层的性质和数量。由于存在氨氧化细菌，因此在生物膜样本中系统地检测到氮。标本的电化学响应与检测到的腐蚀产物紧密相关，腐蚀产物通常富含地下水中的氯，以致掩盖了氨氧化细菌的影响。结果表明，即使在受控实验室条件下，也很难预测生物膜形成在地下水环境中铜腐蚀中的作用。