Originally Posted by merlinextraligh

It’s not that hard to have aluminum bars corrode pretty badly underneath the tape, particularly if you ride the bike on the trainer, sweat a lot, live in a humid, or a coastal environment. If any of that applies you need to take the bar tape off periodically and inspect.

they can corrode while the bar tape still looks fine. I’d wager most people riding AL bars do not regularly retape their bars, when the bar tape still looks pretty much new.