Quote:
Originally Posted by acidrain
Sounds like your current density is a little low, and could be causing desolution (acid eats the ano film as it's being built).
I'm guessing that your using the let-r-fly method... not a very accurate way of anodizing.
If you're using a 12v battery charger, you should consider a CC/CV power source. 12v is going to give you grief, especially hard to dye colors like black and red.
Also, why aren't you heating the dye? Could be the problem right there, except that you said the dye is leaching into the sealer, which leads be to believe the pores have been eaten too big from desolution. Are you using anodizing dye?
Even if you up your acid concentration, you will be limited by your power source (assuming it's a 12v power source).
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Alright, so another failed attempt today. I used heated dye. I anodized the piece for 180 minutes it was drawing 2 amps the entire time from a manual 12v charger. (That's all I have at the moment so I am trying to make it work the best I can. I'll look for a cc/cv ps in the near future.) Sat in 140 F dye for 30 minutes and stuck it in the sealer for 30 minutes. Not as much leaching, but I still get that sharpie marker black look. According to the 720 rule I am running just under 3.5 amp current density.
So it has to be dissolution. What would be the best way to remedy that with my current situation? Lower acid concentration? Colder/warmer acid bath? Shorter anodize time? Bigger cathode? I'm kind of lost at this point. At least I'm getting consistent results
!