Correct me if I am incorrect, but I think it would be ok.
Since carbon steel is more anodic on the galvanic series than coppor alloys, the corrosion would tend to be in the carbon steel.
But since the carbon steel will have the greater surface area in the system, won't that protect it?
We commonly put small sections of copper piping on carbon steel sprinkler lines and don't see corrosion. We do not do the opposite, though which would be a failure waiting to happen.