Is there a problem installing your aluminum posts with poured concrete? If no, why not? If yes, what protection is recommended?

Technically, concrete can cause issues with any metal, but it depends on the mix which can vary widely. We ship 100s of posts per month and 90% of them get installed in concrete. We may get 1-2 calls per year about paint peeling along the bottom where it meets the concrete. It’s so rare that we don’t recommend anything to avoid it.