Alan - my 1947 bus has 100% aluminum rivets, all attaching both aluminum and steel skin to steel struts, and there's no evidence of corrosion because of the rivets .... been the standard since riveted panels started on busses ... OTOH, there's definite oxidation where aluminum panels lap steel with no paint protection between [replacement, not factory], affecting the aluminum, not the steel
Bill
When I worked in the body shop we replaced the studs with aluminum pop rivets. Every once in a while I would get a "come back" with a rust circle about the size of a 1/2 dollar around the rivet. It is caused by galvanic corrosion from the two metals touching.If the aluminum rivets are coated or some are made with an insert to insulate between the metals, then no corrosion will occur. I looked to see if I could find something on line to show you. This is an I-CAR page showing how Volvo uses inserts on bumper reinforcements to avoid the corrosion problem.
I-CAR See Figure 3.
I would say on what you are describing the paint is enough of a barrier to keep the corrosion from occurring?
