You are reading a single comment by @PhilDAS and its replies.
Click here to read the full conversation.
PhilDAS-
And there was us mortals thinking aluminium was safe from corrosion
Pure aluminium is actually quite resistant to corrosion. It's also about as strong as cheese. The alloying elements which go into aluminium alloys to make them strong enough to use as handlebars also tend to make them much more susceptible to corrosion, particularly stress corrosion cracking, and particularly when there are chloride ions present (as in sweat and salted roads).
There is a kind of material called Alclad which is used in aerospace structures specifically to address this, using a high strength alloy core clad in high purity aluminium.
gbj_tester
Looks more like corrosion pitting than foreign object impact. Tape is pretty good at keeping bars in a state of permanent dampness if parked outside every day.