Posted on 07/21/2002 1:15:49 PM PDT by vannrox
Apparently it's the local name for Goethite
As I understand it, protection of ferrous metals, by methods such as galvanizing, has the zinc or similar metals act as sacrifical metals which as they oxidize or degrade they stay in place but yet protect the underlying base metal. CorTen was developed for bridge structural and structual in corrosive envirnments where the base metal itself needed to form a rust-like sacrifical surface that was very thick and self-healing.
The instance cited by the article sounds more like what aluminum does -- its base metal forms its own sacrifical surface of modest thickness.
Having no traning in metalurgy, this is just my "comic book" version of an explanation of the process. (kind of like the comic book versions of calssic lit that used to be put out in the 60s)
Great stuff to read about, didn't the Russian Navy do somthing simalar to this with the external Decks of there ships?
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Just updating the GGG info, not sending a general distribution. |
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