Even fluids that aren't "corrosive" can remove wall material. Fluids with high velocities, rapid turns, containing solids, etc. can remove wall material. Likewise, all fluids remove wall material at some rate - given long enough service, any pipe will thin out.

It's up to the owner to define that. If it's up to you, then you should mention what you used, regardless of whether it's a good decision or a bad decision.