| 摘要 |
A pickling solution, including: 50 g/L to 400 g/L of sulfuric acid; 1 g/L to 100 g/L of at least one oxidant selected from a group consisting of nitric acid, hydrogen peroxide, peroxodisulfate ions, and iron (III) ions; 0.01 g/L to 10 g/L of at least one additive selected from a group consisting of aromatic sulfonic acid, aromatic sulfonate, alkylamine, aromatic carboxylic acid, and aromatic carboxylate; 0.005 g/L to 10 g/L of at least one surfactant selected from a group consisting of alkylbenzene sulfonic acid and alkylbenzene sulfonate; and 10 g/L to 300 g/L of copper sulfate, is used to remove oxide film, and then reused by being electrolyzed and adding the oxidant, the additive and the surfactant in amounts equivalent to consumed amounts.
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