Links to related information on other sites:

The Care and Preservation of Historical Iron 
http://www.thehenryford.org/explore/artifacts/iron.asp

Linking the Past (armor) 
http://www.si.edu/mci/english/research/past_projects/link_past.html

Save Iowa's Civil War Monument Foundation: Canon Restoration 
http://members.aol.com/grandarmy/page183.htm

Archaeological Iron Storage Research Project: A Summary 
http://oi.uchicago.edu/museum/lab/iron_storage.html