铝箔表面氧化膜剥离方法的研究

Stripping method of the oxide film on aluminum foil surface

铝电解电容器铝箔表面氧化膜的常用剥离方法有碱蚀法、高温熔化法和氯化铜剥膜法,本文探讨了不同氧化膜剥离方法适用的范围,指出了碱蚀法和高温熔化法在剥离电极箔氧化膜时存在的局限性。在选择氧化膜剥离方法的时候,要根据氧化膜的性质如外观形貌、厚度、膜结构等方面综合考虑,选择合适的剥膜方法,为电极箔工艺研发提供具有实际应用价值的制样方法和验证手段。试验结果表明,碱蚀法可用于化成后的铝箔(大部分为结晶型羟基氧化铝)氧化膜的剥离,高温熔化法可用于铝光箔表层多孔氧化膜的基础性研究分析,氯化铜剥膜法适用于各种类型的铝阳极氧化膜(如多孔氧化膜、水合氧化膜、致密结晶氧化膜)的剥离。

The common methods for stripping the oxide film on the aluminum foil surface of aluminum electrolytic capacitors include alkali etching,high-temperature melting and copper chloride peeling.The applicable scope of different methods for stripping oxide film was discussed,and the limitations of alkali etching and high temperature melting methods were pointed out in this paper.The properties of the oxide film,such as the morphology,thickness,film structure and etc,should be considered when choosing the stripping method of oxide film,so as to provide the sample preparation method and verification means with practical application values for the research and development of electrode foil process.The experimental results show that the alkaline etching method can be used to peel the oxide film of formed aluminum foil(most of which are crystalline hydroxy alumina),while the high temperature melting method can be used for the basic research and analysis of the porous oxide film on the surface of aluminum foil.And the copper chloride stripping method is suitable for stripping various types of alumina-anode oxidation film(such as porous oxide film,hydrated oxide film and dense crystalline oxide film).