Bluebloomer
Well-known member
I was cleaning the copper pipes, I used in cementing processess. All the copper had a white / grey coating, so I used some clean water and a scuffing pad to clean the copper and take the white / grey coating off.
After the copper was cleaned, I put it in a fresh bucket of water, and the copper turned bright red right away. Okay, whatever.. ? Then I poured the water from cleaning the copper in a big glass jar, and the white / grey coating turned bright yellow after settling.
Could this be iron oxide from some iron that was stored with the copper in an alkaline solution, or could it be some other metal, like the white / grey coating ?
I was asuming the coating on the copper was tin.
After the copper was cleaned, I put it in a fresh bucket of water, and the copper turned bright red right away. Okay, whatever.. ? Then I poured the water from cleaning the copper in a big glass jar, and the white / grey coating turned bright yellow after settling.
Could this be iron oxide from some iron that was stored with the copper in an alkaline solution, or could it be some other metal, like the white / grey coating ?
I was asuming the coating on the copper was tin.