Novel aluminum foil corrosion process for negative electrode of aluminum electrolytic capacitor

The invention discloses a novel aluminum foil corrosion process for a negative electrode of an aluminum electrolytic capacitor. The novel aluminum foil corrosion process can improve alkaline cleaning,generates a colloid with positive electricity on a surface in cleanout fluid, and adsorbs residual chloride ions on an aluminum foil surface, so that the residual chloride ions on the treated aluminum foil surface are 0.5-0.8 mg/m , and therefore, international standards are achieved; and meanwhile, nitric acid for impurity removal and an oxidant are increased to remove a little copper and ironon the aluminum foil surface, so that purity of the aluminum foil surface is higher, and product performances are more superior. The produced aluminum electrolytic capacitor is higher in quality, andis longer in service life greater than 10000 hours (2000 hours for common materials). 本发明公开了种铝电解电容器负极用铝箔腐蚀新工艺，能够增加碱性清洗，在清洗液中生成种表面带正电的胶体，吸附铝箔表面残留氯离子，处理后铝箔表面残留氯离子在0.5～0.8mg/m2，达到国际标准；同时增加除杂用硝酸+氧化剂除去铝箔表面少量铜和铁，使铝箔表面纯度更高，产品性能更优。生产出铝电