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Different effects of three soil microfloras on the corrosion of copper

机译:三种土壤微法对铜腐蚀的不同效果

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摘要

Many studies have indicated that microorganisms provide less protection or even detrimental effects to metals and alloys. In this study, surface analytical (SEM and EDS) and electrochemical techniques (polarization curves and EIS) were used to analyze the behaviour of copper corrosion by actinomyces, fungi and bacteria, which were isolated from the soil. Many pits and craters were presented on the copper surfaces after incubation with these three microfloras, and clear differences in the corrosion products and morphologies of the copper samples were observed in the fungi and bacteria groups compared with the control. The biofilm layer and the cumulated corrosion products are associated with an oxygen concentration cell, which may influence the corrosion susceptibility of copper. Our results suggest that the corrosion rate of copper samples increases more rapidly in the bacteria groups than in the actinomyces, while in the fungi groups it displays a volatile change with a large amplitude.
机译:许多研究表明,微生物为金属和合金提供了更少的保护甚至不利影响。在该研究中,使用表面分析(SEM和EDS)和电化学技术(偏振曲线和EIS)来分析来自土壤中分离的放线瘤,真菌和细菌的铜腐蚀的行为。在与这三个微氯也孵育后,在铜表面上呈现许多凹坑和陨石坑,与对照相比,在真菌和细菌组中观察到腐蚀产物和铜样品形态的清晰差异。生物膜层和累积的腐蚀产物与氧浓度细胞相关,这可能影响铜的腐蚀敏感性。我们的结果表明,铜样品的腐蚀速率在细菌组中越快地增加,而不是在辐射瘤中,而在真菌组中,它显示出具有大振幅的挥发性变化。

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  • 来源
    《RSC Advances》 |2016年第44期|共11页
  • 作者单位

    Southwest Univ Sci &

    Technol Sch Life Sci &

    Engn Mianyang 621010 Peoples R China;

    Minist Educ Engn Res Ctr Biomass Mat Mianyang 621010 Peoples R China;

    Southwest Univ Sci &

    Technol Sch Life Sci &

    Engn Mianyang 621010 Peoples R China;

    Southwest Univ Sci &

    Technol Sch Life Sci &

    Engn Mianyang 621010 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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