tstock wrote:
I believe stainless steel fasteners would be fine with aluminum in
this situation.

More info below quoted from http://www.bssa.org.uk/topics.php?article=89

The table in this reference shows zinc much closer to aluminum than
stainless steel, thus a lower corrosion potential. That suggests the
common zinc plated steel rivets would be a better choice; however, I
must note all the rivets I checked, top to bottom, on my Cobra trailer
are aluminum!

As long as the joint doesn't get wet, the materials don't matter. The
joint will likely have condensation on it at times, so it is some concern.

For the intended application, size, quantity, cost, and weight of the
rivets provide no real restraints, so choosing a suitably strong
aluminum rivet should not be a problem. Put in a few extra and be done
with it. It's a trailer top, not an airplane. I'd skip the expensive
glue, too.

--
Eric Greenwell - Washington State, USA