The electrolyte consist of 95 ml Ethylene glycol, 0.7 g NH4F and 5 ml distilled water. Anodize at 60 v for 1 h. Previously, my TiO2 sample was ok, no erodation. But recently when I want to try again the experiment under exactly same condition,same power supply, the samples eroded. The current goes up to 0.1 A compare to 0.05 A before this. Any idea where I get wrong? Why the current increase?
Thank you for your answer :)
Hi, so many anodizing parameters like electrode distance, temperature of the electrolyte and so on is to be taken care. what about the distance between the counter and working (Ti) electrode? Please do check the distance between these two electrodes and keep consistency. you can refer to our review paper (http://link.springer.com/article/10.1007/s40735-015-0024-x) and other reviews on anodizing for better understanding.
Article A Review on TiO2 Nanotubes: Influence of Anodization Paramet...
Dear Ms Indira,
Distance between Ti foil and counter electrode (platinum rod) I always kept it constant at 2 cm. But, my TiO2 foil still eroded. I do exactly the same method like I do before, but the current still increasing compare to before. From my observation, whenever current increase, my TiO2 foil will eroded. I have no idea where it goes wrong.
Please follow ref :
Journal of Materials Science: Materials in Electronics 27 (2016) 5204–5210
Your concentrations of fluoride and water in the Etg solution are at least two times higher, than required. Besides, the result depends on the nature of cathode (Pt, Cu, Ni...), the content of water in Etg and the purity of fluoride - a higher purity, a lower content is required. The main reason of your problem, seems me, is application a same anodizing electrolyte for anodizing of second (and others) samples. For each electrode, a fresh electrolyte is required.
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