Affixing SST to Al
Affixing SST to Al
(OP)
I would have never thought in a million years it would be this hard to epoxy SST to Al...
I am trying to affix 301 SST to 6061-T6 Aluminum. The surface area is 1 SQinch. I prep both surfaces by sandblasting and then I clean with acetone. I apply the products to the letter of the law, I let it dry for days.
I have tried everythng under the sun, but the parts come apart way too easily. I've done epoxies specifically for metal, I've tried Loctite, extreme adhesive, superglue types, general epoxies... Actually the Extreme Adhesive 300 worked fairly well, but the bond failed after a few months passed.. What am I missing? What else can I try? What other surface prep can I do? Are these metals just not meant to be glued?
I welcome your thoughts! Thanks. Jim
I am trying to affix 301 SST to 6061-T6 Aluminum. The surface area is 1 SQinch. I prep both surfaces by sandblasting and then I clean with acetone. I apply the products to the letter of the law, I let it dry for days.
I have tried everythng under the sun, but the parts come apart way too easily. I've done epoxies specifically for metal, I've tried Loctite, extreme adhesive, superglue types, general epoxies... Actually the Extreme Adhesive 300 worked fairly well, but the bond failed after a few months passed.. What am I missing? What else can I try? What other surface prep can I do? Are these metals just not meant to be glued?
I welcome your thoughts! Thanks. Jim





RE: Affixing SST to Al
Go to ASSIST-Quick Search, the US military's document service:
http://assist.daps.dla.mil/quicksearch/
Type MIL-HDBK-509 in the Document ID box and click submit. This document, MIL-HDBK-509 Cleaning and Treatment of Aluminum Prior to Painting, is very helpful with surface preparation of Al.
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Affixing SST to Al
RE: Affixing SST to Al
Here are couple of approaches you might take.
Go to a big marine supply store and look for a West System kit for bonding Al. While their look for an Al etchant.
At a big box store look for a two part structural epoxy adhesive that is heat cured. If no one has it you may have to use the Internet.
Have everything ready to go.
To prepare the Al do the normal degrease and clean. Depending on quantity Using medium weight rubber gloves I would use a ScotchBrite maroon pad to abrade the surface while keeping pad soaked with any Phosphoric Acid cleaner (Weedac, Ospho, etc.) diluted three acid to 1 water while abrading. After abrading rinse the part in freshly poured bottled distilled water if possible.
As quickly as possible.
If you have an Al etchant, treat the part as per instructions and then apply the adhesive per instructions.
Normally on this type joint one would use a sealant and a mechanical fastener.
What type environment will the joint see?
Any temperature?
RE: Affixing SST to Al
This is an indoor application, no temperature swings.
RE: Affixing SST to Al
http://www.sikacorp.com/
RE: Affixing SST to Al
Check for the same systems as mention before.
Follow the same prep as used on the Al with the exception an added step where the bonding area would benefit from an abrasive blast or even glass beads. I would still clean after blast with SB pad with the Phosphoric Acid.
As I stated before everything need s to be ready to carry through with the whole process once started.
RE: Affixing SST to Al
http://alu
maybe you can find some good hints
hope this help
S
Corrosion Prevention & Corrosion Control