AN ELECTROCHEMICAL STUDY OF PHASE TRANSITIONS IN RUST LAYERS
AN ELECTROCHEMICAL STUDY OF PHASE TRANSITIONS IN RUST LAYERS
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DOI：
10.1002/chin.198348030
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发表时间：
1983-11
期刊：
影响因子：
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通讯作者：
M. Stratmann;K. Bohnenkamp;H. Engell
中科院分区：
文献类型：
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作者：
M. Stratmann;K. Bohnenkamp;H. Engell
用电化学方法研究了孤立锈层的还原和再氧化是否会影响铁的大气腐蚀。在低于0 mV的电位下，首先在γ-FeOOH的顶部形成薄的含Fe 2+的表面层。这种还原的表面层可以在酸性pH下溶解到电池电解质中，或者在较低的电位下，Fe 2+离子可以与γ-FeOOH反应成Fe 3 O 4。磁铁矿的形成可以通过现场磁性测量来跟踪。还原后的表面层很容易被氧化回γ-FeOOH，磁铁矿部分被氧化成γ-Fe 2 O3。
Isolated rust layers have been investigated by electrochemical methods to find out whether their reduction and re-oxidation can affect the atmospheric corrosion of iron. At potentials below 0 mV, first a thin Fe2+-containing surface layer is formed on top of the γ-FeOOH. This reduced surface layer can dissolve into the cell electrolyte at acid pH, or at lower potentials the Fe2+-ions can react with γ-FeOOH to Fe3O4. The formation of magnetite could be followed byin-situmagnetic measurements. The reduced surface layer can easily be oxidized back to γ-FeOOH, magnetite can partly be oxidized to γ-Fe2O3.