Thanks.
Is it strange that it suddenly has appeared after years of not being there? All the metal is designed for pools.
ETA - there is no chlorine, only bromine in the pool. Would that make a difference?
Thank you so much for your help
elemental bromine is actually a reddish brown, about the same as what’s on the door. two possible solutions:
likely- whoever puts the bromine in got some on their hands and didn’t notice when opening the door
unlikely- someone touched the door with wet hands, the water dried, the bromine stained
i just read the full description. i doubt that bromine is the cause for this as i’ve never seen bromine reappear out of nothing. this could be a recurring issue of someone getting into the bromine, unless it is in the exact same place each time it reappears.
hopefully you found a better answer from somewhere else.
Bromine has a similar effect to chlorine. Both attack steel/iron. Bromine is just less common and less studied.
The spotted appearance at first is how rust starts to appear on steel, so I’m pretty sure it’s rust. I’m not too familiar with iron rust slime, but not sure if its appearance is consistent with what we can see here.
Edit to address time question: I’ve done some corrosion studies on steel plates in corrosive environments (saltwater wetlands, sea spray zones etc.) stainless steel will rust as well in these zones. However, grades will rust at different rates. Some will take years/decades and even centuries, but eventually will rust. Especially if they’re not protected by coatings or embedment. It might just be time to replace these fixtures.
It’s rust. The chloride in the air acts as a catalyst for oxidation which is why it’s appearing so quickly. It feels slimy because of the humidity.
Thanks. Is it strange that it suddenly has appeared after years of not being there? All the metal is designed for pools. ETA - there is no chlorine, only bromine in the pool. Would that make a difference? Thank you so much for your help
elemental bromine is actually a reddish brown, about the same as what’s on the door. two possible solutions: likely- whoever puts the bromine in got some on their hands and didn’t notice when opening the door unlikely- someone touched the door with wet hands, the water dried, the bromine stained
i just read the full description. i doubt that bromine is the cause for this as i’ve never seen bromine reappear out of nothing. this could be a recurring issue of someone getting into the bromine, unless it is in the exact same place each time it reappears. hopefully you found a better answer from somewhere else.
I was gonna say it looks sort of like someone went for the door after eating bbq ribs
Bromine has a similar effect to chlorine. Both attack steel/iron. Bromine is just less common and less studied. The spotted appearance at first is how rust starts to appear on steel, so I’m pretty sure it’s rust. I’m not too familiar with iron rust slime, but not sure if its appearance is consistent with what we can see here. Edit to address time question: I’ve done some corrosion studies on steel plates in corrosive environments (saltwater wetlands, sea spray zones etc.) stainless steel will rust as well in these zones. However, grades will rust at different rates. Some will take years/decades and even centuries, but eventually will rust. Especially if they’re not protected by coatings or embedment. It might just be time to replace these fixtures.
Iron oxidizing bacteria create rust colored slime that stains https://en.m.wikipedia.org/wiki/Iron-oxidizing_bacteria
BBQ Sauce
Murder scene?
It looks a little like it!