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| A STUDY OF FACTORS INFLUENCING AC ETCHING OF ALUMINIUM CAPACITOR FOIL |
| Zhang Sanping;Li Yuexi;Zou Ruihai(Wuhan Research Institute of Materials Protection)Yi Shiqi(Wuhan Electrolytic Capacitor Factory ) |
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Abstract Alternating current etching is an important technique for increasing the specific surface area of aluminium capacitor foil for low voltage use. The present research was carried out on the influence of etchant bath composition and operating parameters to obtain a desirable surface morphology and high capacitance of the etched foil while keeping its tensile strength within the required range. Experimental results showed that the etched foil with the largest capacitance up to 33 μF/cm2 could be obtained at a temperature of 47±2℃ and current density of 0.5A/cm2 in a hydrochloric acid etching solution containing a proper surface protectant and another auxiliary additive with the Al3+ concentration from 5.36 to 6.55g/L. Cyclic voltammetric curves were measured to explain the mechanism and effects of above-mentioned factors on AC etching.
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Received: 25 April 1996
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Cite this article:
Zhang Sanping;Li Yuexi;Zou Ruihai(Wuhan Research Institute of Materials Protection)Yi Shiqi(Wuhan Electrolytic Capacitor Factory ). A STUDY OF FACTORS INFLUENCING AC ETCHING OF ALUMINIUM CAPACITOR FOIL. J Chin Soc Corr Pro, 1996, 16(2): 133-139.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I2/133
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