Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Color of Rust

[Subject Prev][Subject Next][Thread Prev][Thread Next]
When steel (iron) rusts, it forms several different corrosion products, depending on the relative availability of oxygen and water.  The colors range from the familiar red-brown to blue, green, and black.

Does anyone happen to know (off-hand),  the various products and under what conditions they are formed.  In particular, I am curious as to whether steel constantly covered with 1/8 in. of water (for say five years) would form a soft black corrosion product, due to the limited oxygen.

Gail S. Kelley