About: http://webisa.webdatacommons.org/66021427

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The thick outer oxidized layer prevents the internal material from being exposed to moisture, oxygen, and other factors that can cause the metal to disintegrate.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org