B&O Freight Car Brown, was Re: B&O Wagontop
Tiny nit, Tony and Jim. Ferrous oxide is black (Fe+2). Ferric oxide (Fe+3) is the red-brown pigment, and also rust, with Tony's caveats. Different oxidation state = different crystalline structure = different color.toggle quoted messageShow quoted text
With that said, the term "ferrous" has a more general meaning (outside of chemistry) of "containing iron", and that might be what the paint-specifiers intended.
Peace, Rick Aylsworth
Tiny nit, Jim, but it's the other way around. Rust is