I am more concerned about the design of the bath tank and the instrumentation involved in temperature maintenance including chiller, temperature controller, coil and/or heat ex changer . . .
Dear Ahmar,
I think the best cooling is the direct one, So you can use peltier cooler.
You do not need to circulate water for cooling. This will simplify your apparatus.
You can build your vessel from insulting materials as double glass wall.
Best wishes
The basic rule is that you have to dissipate all energy (heat) you're "injecting" - mainly the thermal flow from ambient, electrical losses and the energy injected via the magnetic stirrer.
keeping current and stirrer rpms low might help in your efforts, good thermal isolation might add to this.
Hi Ahmar, Some more detailed information would be useful. For example the area you are anodizing, nature of the soultion etc. If it is only a small area then you can just have a large bath of liquid initially cooled down and the temperature increase will be very minimal. The benefit of this is also that the anodising process is affected by the level of aluminium ions in solution which will be more significant if smaller volumes.
You could consider using peltier coolers directly mounted to your tank, though these are not very efficient it would simplify your system.
Otherwise you should look to buying a laboratory style chilled water system.
You could also consider using an aluminium counter electrode (tube block etc.) and this could be part of your cooling system, which would give you much better thermal conduction into the solution.
Phil Denby Thanks for your valuable suggestions. Area of 2um thick Al on ITO based glass substrate will be around 1 inch x 1 inch and I will be using 0.3 mol/liter H2SO4 for 60 minutes. I am more interested in finding a laboratory style chilled water system that's why I posted my query here.
U. Dreher . . . Thanks . . . . This was my first approach and may be I will use it in the beginning . . . . lets hope for best
Phil Denby Can you please suggest me some laboratory style chilling water systems. I am based in China
I guess something like this would be OK:
https://www.aliexpress.com/item/Free-Shipping-2018-popular-and-good-quality-lab-3L-20-Degree-water-recirculating-chiller-without-heater/32834653835.html?spm=2114.search0104.3.2.61e279149SKz8J&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_319_317_10696_10084_453_10924_454_10083_10618_10920_10921_10307_10922_537_536_10059_10884_10887_100031_321_322_10103,searchweb201603_51,ppcSwitch_0&algo_expid=7e5a10e8-a72c-4ac5-885a-3a0b8171bb4f-0&algo_pvid=7e5a10e8-a72c-4ac5-885a-3a0b8171bb4f
You could actually put your beaker directly into the water tank of the unit.
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