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Influence of phosphate species on green rust I transformation and local structure and morphology of y-FeOOH

机译:磷酸盐种类对绿锈I转化及γ-FeOOH局部结构和形貌的影响

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摘要

To clarify the role of phosphate in the formation of corrosion products, the transformation of GRI(Cl~- ) with the addition of phosphate was characterized through XRD, TEM, and solution analysis. Electrochemical analysis showed that the transformation of GRI(Cl~-) was delayed and the size of the final products, i.e., γ-FeOOH was reduced in the phosphate added case. X-ray absorption spectroscopy indicated that the neighboring Fe-Fe coordination number of FeO_6 octahedral unit in γ-FeOOH was decreased. These effects of phosphate are attributed to its adsorption on GRI(Cl~-) and nucleated γ-FeOOH that prevented particle growth during oxidation process.
机译:为了阐明磷酸盐在腐蚀产物形成中的作用,通过X射线衍射,透射电镜和溶液分析对GRI(Cl〜-)与磷酸盐的转化进行了表征。电化学分析表明,在添加磷酸盐的情况下,GRI(Cl〜-)的转化被延迟并且最终产物即γ-FeOOH的尺寸减小。 X射线吸收光谱表明,γ-FeOOH中FeO_6八面体的相邻Fe-Fe配位数减小。磷酸盐的这些作用归因于其对GRI(Cl〜-)的吸附和成核的γ-FeOOH,阻止了氧化过程中的颗粒生长。

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  • 来源
    《Corrosion science》 |2011年第8期|p.2446-2452|共7页
  • 作者单位

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan;

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan;

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan;

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A. Iron; B. EXFAS; B. XRD; C. Oxidation; C. Oxidation reduction; C. Rust;

    机译:A.铁;B。 EXFAS;B。 XRD;C。氧化;C.氧化还原;C.锈;

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