Paper on Secondary Bonding

[Toot]

While researching some info on metal-to-FRP bonding techniques, I stumbled upon this paper. It didn't tell me much that I didn't know, but it did dispell some of the "I heard this works pretty well..." rumors that go around from time to time...

http://www.nwlink.com/~orion/Documen...L%20EA-9430%22

[marshmat]

Egad, don't even get me started on Hysol. It's amazingly strong stuff, yes, but it's rather finicky and takes a fair bit of skill and experience to get it to work the way you want it to. Nice to see some numbers to back up shop experience though.

[johnW]

Thanks for the link...very informative. I have used both Hysol and Plexus but
as with anything new you try, you do not know how it will stand up until months or years have passed. It will be nice to have some test information to base my future choices on, that was not conducted by the manufactorer.

[Russ]

As an ex Ciba Resins Dept adhesives tech man I can tell you that FRP to metal is not all that difficult. The most essential element is the surface prep as related to the metal to be bonded to. Believe me the Companies like HYSOL, PLEXAS, HUNTSMAN and quite a few more are essentially compounders who take the basic materials and taylor them to perform well for a specific job. Look at the spec sheets and take their advice exactly. For example cold rolled steel. You have 4 hours from the grind and surface wipe to the complete coverage with resin. That is the window of opportunity before oxidation begins to form. Many, many tests are performed in the lab before a product is released so the data is trustworthy.
Oh, one last point. The bond is only as good as the FRP being bonded. If the laminate can pull apart within itself that is the best you will get.