Abstract This study investigated the adsorption of hydrogen bubbles and tunnel formation on aluminium foil during direct current (DC) electrochemical etching in an electrolyte with and without silicone oil additive. The results indicated that the etched tunnels obtained in the electrolyte containing silicone oil were more uniformly distributed with a more consistent size and length. This was attributed to the additive ability to facilitate the desorption of large bubbles on the aluminium surface, resulting in uniform corroded regions. Moreover, the generated narrow tunnels can accelerate the hydrogen evolution inside the tunnels, resulting in increasing the length of the etched tunnels.

中文翻译：

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硅油添加剂对铝箔吸氢及隧道形成的影响

摘要 本研究研究了在含和不含硅油添加剂的电解液中进行直流 (DC) 电化学蚀刻过程中氢气泡的吸附和铝箔上隧道的形成。结果表明，在含硅油的电解液中得到的蚀刻隧道分布更均匀，尺寸和长度更一致。这归因于促进铝表面大气泡解吸的添加剂能力，导致均匀腐蚀区域。此外，产生的狭窄隧道可以加速隧道内的氢析出，导致蚀刻隧道的长度增加。