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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Behavior of Fe-Ni Alloys as an Inert Anode for Aluminum Electrolysis
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Electrochemical Behavior of Fe-Ni Alloys as an Inert Anode for Aluminum Electrolysis

机译：Fe-Ni合金作为铝电解惰性阳极的电化学行为

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Fe-Ni alloys have been regarded as promising candidates for inert anodes of aluminum electrolysis. Inthis study, a binary Fe–Ni alloy with 32 wt% Ni content was tested as an inert anode, and its hightemperature oxidation and corrosion behavior were studied. Thermogravimetric oxidation showed thatthe oxidation kinetics followed the parabolic law, and the oxidation rate constant was 9.568×10 -4 kg 2 ·m -4 ·h -1 at 970 ℃. Fe 2 O 3 and Fe-Ni-O were identified as two major components of the oxidation scale usinga combination of X-ray diffraction and energy dispersive spectrometry. The anodic behavior of pre-oxidized and non-oxidized Fe–Ni alloys in cryolite-alumina melts was studied for the first time in alaboratory-scale transparent electrolysis cell. It was observed that small bubbles were released rapidlyon pre-oxidized anodes, while no bubbles were generated on non-oxidized anodes and the moltenelectrolyte become opaque quickly. These findings confirmed that the precondition of the Fe-Ni alloy ishelpful to improve its corrosion resistance.
机译：Fe-Ni合金被认为是铝电解惰性阳极的有希望的候选者。在这项研究中，测试了一种Ni含量为32 wt％的二元Fe-Ni合金作为惰性阳极，并研究了其高温氧化和腐蚀行为。热重氧化表明，氧化动力学符合抛物线规律，在970℃下氧化速率常数为9.568×10 -4 kg 2·m -4·h -1。 X射线衍射和能量色散光谱法相结合，确定了Fe 2 O 3和Fe-Ni-O是氧化皮的两个主要成分。在实验室规模的透明电解池中，首次研究了预氧化和未氧化的Fe-Ni合金在冰晶石-氧化铝熔体中的阳极行为。观察到小气泡在预氧化的阳极上迅速释放，而在非氧化的阳极上没有气泡产生，并且熔融的电解质迅速变得不透明。这些发现证实了Fe-Ni合金的前提条件有助于提高其耐腐蚀性。

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