| 摘要 |
PURPOSE:To obtain a surface treating agent suitable for Al foil used for an electrolytic capacitor by providing a composition consisting of an alkali metallic compound, an anionic surfactant and an org. reducing agent. CONSTITUTION:This surface treating agent is composed of an alkali metallic compound, an anionic surfactant and an org. reducing agent. Sodium hydroxide is used as the alkali metallic compound, sodium alkylnaphthalenesulfonate as the anionic surfactant, and ethanolamine as the org. reducing agent. When metallic foil, especially Al foil is treated with the surface treating agent, the etching rate is increased. |
