There is a chance that you may have a stray current from a battery or other source, and it is causing corrosion where the aluminum is exposed to water or is against a different metal (like a screw, frame, or other fastener). I noticed that the exterior seems to have two pits that are coincidentally along the horizontal.
Hey all, what do you think about these mystery holes that are appearing on my RV? When the bubbles burst, the grey underneath is chalky. They turn into holes eventually.I feel like this photo shows the entire lifecycle of these blemishes. This is happening on a 2024 rig in Central Texas.
Low voltage galvanic cell. Likely some contact with dissimilar metals that creates a cell, and eventually it will break through as corrosion.
Check if there is hot skin with a multimeter
I would take it to the dealership and ask them wtf
It looks like someone broke a mercury switch or thermometer. It could be caused by a stray current but I imagine you could feel a current strong enough to do that in a year.
Greetings… I had an older Lance travel trailer and had the same issue.. I would clean them off and spray zinc on them… I figured it was some type of electrolysis or stray current.. I believe I located The source there was several grounds for lighting that were attached to the aluminum skin.. it was kind of strange the electrolysis seem to be localized near the right corner.. hope that helps, 🚐
Source: What is putting holes in my RV?
