No. Aluminum water pipes in a house? Don't think so.
And in a closed loop it's the leaching of ions that increases the density to the point where they are deposited on copper, eating the copper away. In an open loop the alum ions never reach saturation levels.
Distilled water will leach plasticizers and material off the metals. It will just sooner or later gunk up the loop, no matter what you use as liquid. Sure you can go a year etc but most of us just drain/refill every 6 months or so. I go the extra mile and every year tear it ALL down, opening pumps, blocks, checking hose etc. And I'm for sure not the only one by a long shot.