Links to related information on other sites:

The Care and Preservation of Historical Brass and Bronze 
http://www.thehenryford.org/explore/artifacts/brass.asp

Nigerian Bronzes 
http://www.si.edu/mci/english/research/past_projects/nigerian_bronzes.html

TESTING CORROSION INHIBITORS FOR THE CONSERVATION OF ARCHAEOLOGICAL COPPER AND COPPER ALLOYS 
http://palimpsest.stanford.edu/jcms/ issue3/falter.html

A LATE BRONZE AGE SICKLE FROM SHINEWATER PARK: THE TREATMENT OF A WATERLOGGED COMPOSITE 
http://palimpsest.stanford.edu/jcms/issue4/brysb.html