Gary.

Re: your question about the aluminum maybe being anodized. If it's hard anodize (which is most likely for an extremely tough, anti-corrosion surface treatment rather than merely a decorative treatment) then the aluminum surface is converted to a very good insulator. If a test with an ohmmeter shows no conductance (infinite resistance), even after aggressively digging the meter's probes into the surface, then one can conclude that the part has been anodized. The same test on Alodine treated aluminum will indicate close to zero ohms. Also alodine will easily scratch and hard anodize will not. In a past life as an electronic engineer/designer, I used hard anodize as an insulator for mounting active components. It will easily withstand several hundred volts as an insulator.

As far as bonding to any epoxy, I'd bet that hard anodize would provide as good or better a surface as bare Al or alodine. Regardless of the surface treatment, the shear strength of the bond will far exceed the peel strength, so one needs to assess the application.

Regards,

Dan Schaefer
LNC-2   N235SP --
I am using the free version of SPAMfighter.
We are a community of 7 million users fighting spam.
SPAMfighter has removed 931 of my spam emails to date.
Get the free SPAMfighter here: http://www.spamfighter.com/len

The Professional version does not have this message