10-19-2013, 11:03 PM
Iron that has been heated very hot at all will turn black because some of the carbon molecules are driven to the surface. Copper alloys will have more copper on the surface for the same reason. It's possible to get soot (carbon) on the surface of copper alloys, but it doesn't stick with the tenacity of carbon on iron/steel.
M. Demetrius Abicio
(David Wills)
Saepe veritas est dura.
(David Wills)
Saepe veritas est dura.