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Adhesive that will survive anodizing

March 24, 2010

I have aluminum tubes that have the ends sealed with solid aluminum plugs. I need to attach these plugs into the tube before anodizing.
Is there an adhesive that will withstand the process of anodizing?
Thanks for your help.

Aaron Crist
product designer - Mesa, Arizona, USA

simultaneous replies

Forgot to mention, The aluminum is 6061 and will be using a Type II anodizing process. Thanks for any help.

Aaron Crist
- Mesa, Arizona, USA

Adhesives are one method.
Putting in one plug, filing the tube with water and then inserting the other plug is cleaner and keeps the tubes from floating. Since the tube is full, there is very little tendency to let chemicals enter, even tho you are using solutions and rinses of different temperatures.

James Watts
- Navarre, Florida

Is the plug permanent or just a temporary plug intended to prevent the I.D. from anodizing? I don't think an adhesive will work, but there will be a way to get it done. If possible, attach a picture of the tube and plug. Also tell us what type of anodizing it is.

Jon Barrows
Jon Barrows, MSF, EHSSC
GOAD Company
supporting advertiser
Independence, Missouri


I am not sure of which adhesives will work (I know it is done) but beware that the adhesive can electrically isolate the plug and prevent it from anodizing along with the tube (or vice versa) unless both/all items are contacted during racking.

Willie Alexander
- Colorado Springs, Colorado

If I were you, I'd anodize the caps and tubes separately, then attach afterward. The main reason being, if the seal is not perfectly done (liquid tight), the tubes could possibly get process solutions trapped inside which could/would leak out a a later date. Or, even if there is a slight gap, that could also trap solutions that would leach out and give you, or your anodizer, cosmetic issues.

Marc Green
Marc Green
anodizer - Boise, Idaho

Thanks for the responses. The plugs are made from round bar and are the same OD as the tube. Part of the round bar will be machined to fit inside the tube.
I didn't think about the tubes floating this may be a problem with my anodizer. I'm just looking for a compatible epoxy that won't be affected by the anodizing process.

Aaron Crist
- Mesa, Arizona, USA
March 26, 2010

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