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Originally Posted by caswellsage
Good questions just up my alley.
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I figured they were, but now you know why I said 'after you've done a few runs in the big tank'
Range hood's a good idea.
For the mini line I'll probably use microwave to heat the dye - I picked that idea up here and have used it a couple times, works well.
I'll use something that can be sealed for the tank so when it's not in use it's easy to button up.
Instead of traditional agitation, I'm thinking about trying out a couple of wacky ideas (in big tank first) - I want to try attaching some sort of a vibrator to the hanging wires, and I've also been pondering ultrasonic. They make these ultrasonic transducers for creating a fog effect in ponds. My thinking is to encapsulate one against acid exposure and place in bottom of tank, probably not even running it nonstop - 10 seconds per minute possibly (I really don't want 'fog' rolling out the top of the tank). Vibration would probably be more effective, definitely cheaper - but having an ultrasonic anodizing tank is an intriguing idea..
As long as you're keeping 3-6" distance between part and cathode, I don't see any reason you'd experience higher resistance with a bigger tank. I got curious the other day when you mentioned it and measured mine. At 3" it's about 250k and at 6" it's about 450k. I didn't measure tank temp but it was probably about 85° F (no, wasn't anodizing anything!).
I've been using a drill powered blade type mixer to stir up my dye, but never thought of using one as an agitator - I've seen those squirrel cage ones. I dono about that metal shaft, though - you might be a bit optimistic about that. I had to temporarily use my mixer as a hanging bar on a couple of runs and it already started to change color just from the fumes. You might want to give some thought to coating as much of the shaft as you can with some tool dip. Definitely report further - that's a pretty slick idea.
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Originally Posted by sswee
If the parts you do are small enough
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I've got several that are in the neighborhood of 1x2x2", various little hunks of alum rod and formed sheet. Before hatching this 1 gal idea I'd planned on re-setting up a 3 gal tank.
Have you noticed any difference in fume level between aeration and your current method of agitation?