I use a metal water bottle, I think it’s aluminium, but it’s started to go rusty inside, which is a bit weird. I presume there’s some sort of reaction going on with the salt that I put in there. So I was thinking of getting a new water bottle, but glass is a bit fragile for the way I throw my bag around. Would a stainless steel bottle rust do you think?
Rusty? water bottle
Aly doesn’t rust, but it can corrode if the protective top coating has been damaged.
I know, and the corrosion is white, very similar to the aluminium. But the stuff inside is brown, in spots just like rust
Looks like galvanic corrosion
Stainless steel would also corrode in such an environment. Best option would be a glass or plastic bottle.
My glass water bottle has a rubber outer casing. It probably wouldn’t survive hurling onto concrete, but it can take quite a bit of banging around.
I’ll go for the glass then. Would the corrosion be from the brass ring around the top do you think?
I w dropped my glass one several times. No problem with the rubber/plastic sleeve. But I can see where there might be that one time too many some day.
Brass and steel don’t react the way copper and aluminum or aluminum and steel do. It is possible that the stains are from a high iron level in your water. I had that problem at the last place. Even stainless steel would develop rust spots—not because the stainless steel was rusting, but because rust was building up on the surface. I found it could be scrubbed off, with a certain amount of effort.
I’ve bought myself a nice shiny glass one now. I don’t think this has happened on any of the other bottles in the household,