EPDM and Stainless steel bonding

mail4a2z,
Welcome to Eng-Tips.
Showing your picture in the post so that people can see it, rather than forcing people to download a file, attracts more responses.
Here is your drawing:


You could be talking to an application engineer at either 3M or Hysol/Loctite/Henkel/whatever they're called now to get a recommendation that will include important details like surface preparation.

I can suggest some expensive aerospace structural adhesives that will definitely bond to SS, such as Hysol EA9309.NA, but they're usually very stiff. I don't know for sure if it will work with EPDM, but it probably will. Need to know more information if something less expensive will do.
Can you say if the SS part in your design will have to flex? If so, how much? Trying to estimate the amount of displacement in the joint will give you some upper bound to the modulus of the adhesive you can accept.
Thermal range?
Moisture?
The more you can tell, the better the answers will be.


No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
STF

Please guys

Surface roughness is NOT the mechanism of adhesion. It is a chemical bond at the interface that provides both short-term strength and long term bond survival. The mechanism of bond degradation is hydration of oxide layers at the metal interface, and this is vital for the stainless interface. It is not all about the adhesive. The surface prep is far more important. And please don't believe the hype from adhesive salesmen that you just need a clean, rough surface. The surface must be clean, but also must be chemically active and then treated to provide hydration resistance. Silanes are best for that but must be applied while the surface is chemically active.

The EDPM may not need chemical treatment, but please recognise that you must bond while the surface is chemically active. In other words bond as soon as possible.

Regards

Blakmax

A contact cement would probably work reasonably well.

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

I just posted this link in the rubber forum in reply to a question on rubber bonding. It is a review article on rubber/metal bonding. Blakmax, I think you may find it interesting.

Composite Pro

Can you post the link?

Blakmax

Ooops, sorry. I see you found it in the other forum but here it is for anyone interested.