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Journal of Materials Engineering and Performance

Erschienen in:

23.07.2018

Effect of Thiourea on the Corrosion Behavior of Aluminum Anode Foil of Aluminum Electrolytic Capacitor

verfasst von: Zixi Fan, Chengfei Zhu, Fengzhen Chang

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 8/2018

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The specific capacitance is a key performing factor for the aluminum anode foil of aluminum electrolytic capacitor. In order to increase the specific capacitance, the effect of thiourea (TU) as corrosion inhibitor on the aluminum anode foil was investigated in this paper. Electrochemical impedance spectroscopy (EIS), polarization curves and weight loss measurements were used to investigate the effect of corrosion inhibitor TU added to nitric acid. EIS and inductance–capacitance–resistance (LCR) meter were also used to measure the specific capacitance of the aluminum anode foil, which was etched in nitric acid containing different contents of TU, and then formed in boric acid solution (100 g L⁻¹) at 540 V. The results showed that the TU could be used as an inhibitor for Al in an acid solution. When the concentration of TU was 0.10%, the specific capacitance reached up to 0.661 μF cm⁻², which increased by nearly 24% compared to that without TU. The data for the specific capacitance of Al anode foil corresponding to different TU concentrations obtained by EIS coincided well with the one obtained using LCR meter; thus, EIS could be effectively used for the preliminary selection of the type and ideal concentration of inhibitor.

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Titel: Effect of Thiourea on the Corrosion Behavior of Aluminum Anode Foil of Aluminum Electrolytic Capacitor
verfasst von: Zixi Fan
Chengfei Zhu
Fengzhen Chang
Publikationsdatum: 23.07.2018
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 8/2018
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-018-3530-4

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