Ok to separate steel from aluminum with bronze? (Galvanic action) I have an aluminum hinge that I want to use with a stainless steel hinge pin. The problem is that I cannot use the steel pin directly because there would be galvanic action between the stainless steel and aluminum which will result in corrosion. Therefore I need to put some kind of bearing liner between them. Note that the hinge will experience strong forces, so using something soft like nylon will not work.

My preference would be for a bronze bushing, but I do not know if there is galvanic action between bronze and stainless steel, or bronze and aluminum.

What material can I use? Is there a simple explanation of how I can predict whether a metallic alloy will react galvanically with a different alloy? I have Mathematica, so if there is a formula I can write in Mathematica, that would be just as good.

-------------------------------- Sacrificial Anode?

One method I have heard of to protect from galvanic corrosion is a "sacrificial anode". If I attach a bar of zinc to the back of the aluminum hinge will that somehow protect it, and allow me to use a stainless steel hinge pin?
If you must use an aluminum hinge with a steel pin, anodize the aluminum. Anodizing builds up a coat of very hard, non-conductive $\ce{Al2O3}$, sapphire. 

There are commercial metal fishers that will perform this, if you do not want to do so. There is a bit of an art in the process of creating a uniform coat of the required thickness: too thick and it cracks off; too thin and it wears off.