If you are worried about galvanic corrosion between the dissimilar metals, I don't think it will be an issue.
Here's why.
Since the rings and bases are either coated, painted or anodized, the differing metals are not actually touching each other. The issue comes when you have dissimilar metals in close direct contact, especially in an unfriendly environment. Even then, it doesn't happen overnight. However, even in that situation, a thin coating of anti-seize grease is enough to keep the problem at bay. Bottom line. Should not be an issue.