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Pastimes : Don't Ask Rambi -- Ignore unavailable to you. Want to Upgrade?

To: Ilaine who wrote (51679)	6/2/2000 1:29:00 PM
From: Crocodile	Read Replies (1) \| Respond to of 71178

I think that one of the things that has an effect on the colour of various metals is the kind of environment they are in. When I worked in the radiator shop, we worked mainly with brass and copper and those metals can have very different colours depending on what kind of moisture and acids they come in contact with. The air in our shop was always full of acid... because we used to use our torches to clean the metal before soldering by heating it after brushing on muriatic acid or else soldering flux... The acid would evaporate off again when you turned the torch flame onto it and leave very clean metal for soldering. Anyhow, the acid in the air used to turn copper and brass a very powdery green... brass was more yellowish and copper was often a wet, powdery green... Steel and iron just about rotted before your eyes in that place... it was incredible... Sometimes wonder what it was doing to our lungs, but the truth is, I'd rather not know...(-: