recommended bath concentration for 12A/ft^2 current density

[Fibergeek]

Neomoses,
Recall that you can use PAR detection at 12A/sq.ft, or any other current density. The value of PAR will be a little higher than 2.5 Ohms/sq.ft., the peak will be very pronounced and hard to miss. You will need about 30 Volts peak, anodization time should be around 15 minutes. Your agitation system will really earn its keep, since power dissipation in the electrolyte will now be a concern.

Is 30 Volts peak and 15 minutes anodization time what you are seeing?

[potsked]

12 amps a sq foot is what caswell was advocating before you came along, and they suggested anodizing for around 45-50 minutes.

im not really sure how much current is going into the parts, but from others i know that chargers usually put out 10 amps a sq. foot.

crude as it is, i still find the let it rip method adequate for now.

[NeoMoses]

Originally Posted by Fibergeek

Neomoses,
Recall that you can use PAR detection at 12A/sq.ft, or any other current density. The value of PAR will be a little higher than 2.5 Ohms/sq.ft., the peak will be very pronounced and hard to miss. You will need about 30 Volts peak, anodization time should be around 15 minutes. Your agitation system will really earn its keep, since power dissipation in the electrolyte will now be a concern.

Is 30 Volts peak and 15 minutes anodization time what you are seeing?

That's not really what I saw with this batch, so I chose to let the parts go for 45 minutes (my old method) instead of detecting PAR.

Instead of seeing the distinct peak like you did within the first 15-20 minutes, my voltage:time curve looked much like the 4.5 A/ft^2 curve for LCD with a quick rise to a certain voltage and then a nearly constant voltage for the remainder of the time. I believe that the more concentrated bath may have something to do with this, and I'm not going to speculate too much since I have only done 1 real batch with this method. Over the next few weeks, I'll anodize more parts in this bath (for now, let's call it the SCD or Standard Current Density Bath). I'll try to keep better logs of voltage and post them when I get more trials completed.

[NeoMoses]

Originally Posted by potsked

12 amps a sq foot is what caswell was advocating before you came along, and they suggested anodizing for around 45-50 minutes.

im not really sure how much current is going into the parts, but from others i know that chargers usually put out 10 amps a sq. foot.

crude as it is, i still find the let it rip method adequate for now.

Guys, can we just let this rest for now? Old Timers, can we just suffice to say that the old method can (and still does) work, although it may not be the best solution for a beginning newbie?

[Fibergeek]

OK.
Post your data when you're ready.