[kco1196]

What did I do wrong? The two largest pieces turned out orange, the four smaller ones turned out golden. My first thought was to much current density (approx 12amps CD) caused dissolution. But from what I've read about dissolution the parts would have been chalky & the coating would probably 'wipe' off. Mine didn't have that.

Basically here is what I did that has always worked in the past-

degreased parts with simple green & hot water
rinsed

tumbled parts for about 3 hours w/treated corn cob media

degreased again with simple green & hot water
rinsed w/r.o. water

anodized for 65 minutes @12CD (temp was 66-69')
R.O. rinse

neutralized (baking soda & water)
R.O. rinse

dye'd in orange @120' for 15 minutes
R.O. rinse

sealed for 20 minutes in a steamy hot cooler bath was @180'
(been successful in the past)

The only thing different is my Current Density. Normally I go for 6-9 amps. All parts had excellent connection using aluminum wire. I'm speculating they weren't all the same grade aluminum.

Thanks in advance,
Gary