Abstract

The effect of additive DCTA (1,2-diaminocyclohexane-tetraacetic acid) to HCl + H₂SO₄ solution on electrochemical tunnel etching behavior of aluminum foil was investigated. The results show that DCTA can activate Al foil surface by decreasing the self-corrosion potential and breakdown potential, which may be attributed to that DCTA forms chelate with dissolved Al³⁺, thus suppressing the oxide film formation. The tunnel density and effective tunnel number as well as uniformity of tunnel length of etching foil can be increased after DCTA addition. Furthermore, the specific capacitance of etching foil can be enhanced with trace addition of DCTA.

中文翻译：

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添加剂DCTA对铝箔电化学隧穿腐蚀的影响

摘要

研究了在HCl + H ₂ SO ₄溶液中添加DCTA（1,2-二氨基环己烷-四乙酸）对铝箔电化学隧穿行为的影响。结果表明，DCTA可以通过降低自腐蚀电位和击穿电位来活化铝箔表面，这可能是由于DCTA与溶解的Al ³⁺形成了螯合物，从而抑制了氧化膜的形成。加入DCTA后，可提高隧道密度和有效隧道数以及蚀刻箔的隧道长度均匀性。此外，通过微量添加DCTA可以提高蚀刻箔的比电容。