there are many forms of corrosion to consider. galvanic, acidic and oxidation to name a few.
Aluminum is simply more reactive than most of the other metals used in wheels.
Chromium and Molybdenum are in the same group and both are used to enhance corrosion resistance of steel alloys.
Then you take a look at copper, silver and gold, which are in the same group and they're resistant to acid. You might encounter acid from acid rain.
You want to use brass nipples, because they're not as reactive as aluminum.