heyman65

Topic: bulk anodizing

I have the undaunting task of trying to reduce the percentage of bad parts in my bulk anodizing process. we process 2024 in type two anodize in titanium baskets. I am currently averaging 5% bad per load. (burn and misses constitute the problems) 

AluConsult

Re: bulk anodizing

Hi

Type II anodizing of 2024 in a titanium basket? Sounds like a bad idea, you should use titanium racks with good contact and then be sure to use a ramping in the beginning of the anodizing process. You could also use Pulse anodizing, see my blog www.anodizingworld.com for more information both of the racking issue and the pulse process.

Sunny regards

Anne

AluConsult's Website

DustinGebhardt

Re: bulk anodizing

I was thinking along the same lines as Anne, but with my limited anodizing experience, I didn't want to post anything previously.  


Since you are forming a non-conductive layer, you really want to make sure you have strong contact points between the piece and the anode rack.

-Dustin Gebhardt,
CEF
Plating Engineer
Danaher Tool Group
Gastonia, NC

heyman65

Re: bulk anodizing

when i say bulk Anodize i realy mean bulk. my orders are 20k-150k. small alluminum nuts. racking is out of the question.

leoherrington

Re: bulk anodizing

The trick to bulk anodizing is the basket and the way the parts are arranged and prevented from movement during anodizing.  I can imagine that for nuts nesting would be a problem.  Have you considered other bulk techniques?  Putting the nuts on a spindle or other techniques compatible with automated racking might work.