Corrosion induced metal release from copper based alloys compared to their pure elements
2008 (English)In: Corrosion Engineering, Science and Technology, ISSN 1478-422X, Vol. 43, no 2, 134-141 p.Article in journal (Refereed) Published
Despite numerous studies on atmospheric corrosion of copper and copper based alloys, the corrosion induced release processes of individual alloy constituents suffer from significant knowledge gaps. This investigation comprises metal release rate measurements of copper, zinc and tin from some copper based alloys including brass (20 wt-% Zn) and bronze (6 wt-% Sn), and their pure alloying metals, copper, zinc and tin. Data have been generated during a 2.5 year urban field exposure in Stockholm, Sweden and parallel laboratory investigations in a specially designed rain chamber using artificial rain. Brass shows significantly lower annual release rates of both copper and zinc compared to pure metal sheets of its alloy constituents. Zinc is preferentially released compared to copper. Dezincification of brass occurs both at field and laboratory conditions, a process influenced by rain characteristics. Alloying with tin does not largely reduce the release rate of copper from bronze compared to pure copper. No measurable amount of tin is released from the bronze surface.
Place, publisher, year, edition, pages
2008. Vol. 43, no 2, 134-141 p.
atmospheric corrosion, metal release, copper, zinc, brass, bronze
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-38095DOI: 10.1179/174327808X286383ISI: 000257881900007OAI: oai:DiVA.org:kth-38095DiVA: diva2:436415
14th Nordic Corrosion Congress Location: Copenhagen, DENMARK Date: MAY 13-15, 20072011-08-232011-08-222011-08-23Bibliographically approved