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发明授权
CN100587126C 超高压高比容阳极箔的腐蚀方法 失效 - 权利终止

超高压高比容阳极箔的腐蚀方法
摘要：
本发明涉及一种超高压铝电解电容器用阳极箔的腐蚀方法；属于铝电解电容器制造领域。本发明针对现有工艺只能对低压的阳极箔进行腐蚀而无法对高压的阳极箔进行腐蚀的缺陷，提供一种超高压高比容阳极箔的腐蚀方法。本发明主要步骤为：将铝光箔进行前处理，然后在浓度0.6～4wt%硫酸、2～6wt%盐酸混合液中进行一级直流电解腐蚀，接着在浓度6～10wt%盐酸、0.02～0.2wt%磷酸及0.03～0.2wt%聚乙二醇的混合溶液中进行二级直流电解腐蚀，再在浓度6～10wt%盐酸、0.02～0.2wt%磷酸及0.03～0.2wt%聚乙二醇混合溶液中进行三级化学腐蚀，最后在浓度0.3～3wt%的硝酸水溶液中浸泡。
摘要（英）：

The invention relates to a method for corroding anode foils used in super-high tension aluminum electrolytic capacitor, which belongs to the aluminum electrolytic capacitor manufacturing field, the method aims at defects of the existing technology that only can carry out corrosion to low voltage anode foils and can not carry out corrosion to high voltage anode foils, and provides a super-high tension high specific volume corrosion method, which comprises the following steps: firstly, preprocessing the aluminum foils, secondly, carrying out A-degree direct current electrolytic corrosion in mixed solution of sulphuric acid with concentration of 0.6-4wt% and hydrochloric acid with concentration of 2-6wt%, thirdly, carrying out B-degree direct current electrolytic corrosion in mixed solutionof hydrochloric acid with concentration of 6-10wt%, phosphorus acid with concentration of 0.02-0.2wt% and carbowax with concentration of 0.03-0.2wt%, fourthly, carrying out C-degree chemical corrosion in hydrochloric acid with concentration of 6-10wt%, phosphorus acid with concentration of 0.02-0.2wt%, and carbowax with concentration of 0.03-0.2wt%, and finally, soaking in nitric acid water solution with concentration of 0.3-3wt%.

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