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Corrosion-induced release of Cu and Zn into rainwater from brass, bronze and their pure metals. A 2-year field study
KTH, Skolan för kemivetenskap (CHE), Kemi, Yt- och korrosionsvetenskap.ORCID-id: 0000-0002-2123-2201
KTH, Skolan för kemivetenskap (CHE), Kemi, Korrosionslära (stängd 20081231).ORCID-id: 0000-0003-2206-0082
KTH, Skolan för kemivetenskap (CHE), Kemi, Korrosionslära (stängd 20081231).ORCID-id: 0000-0002-9453-1333
2008 (Engelska)Ingår i: Environmental Monitoring & Assessment, ISSN 0167-6369, E-ISSN 1573-2959, Vol. 144, nr 1-3, s. 455-461Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A 2-year field study has been conducted in an urban environment to provide annual release rates of copper and zinc from brass (20 wt% Zn) and copper and tin from bronze (6 wt% Sn) compared to sheets of their pure alloy constituents, copper and zinc. Despite relatively low nominal bulk alloy content, substantially more zinc was released from brass compared to copper. Both metals were released at a significantly slower rate from the brass alloy, compared to the pure metals. The proportion of release rates of copper and zinc from the alloy differed significantly from their proportions in the bulk alloy. Bronze showed relatively constant release rates of copper, being similar to that of pure copper sheet. The release of tin from bronze was negligible. The results clearly show that alloys and the pure metals behave very differently when exposed to rainwater. Accordingly, release rates from pure metals cannot be used to predict release rates of individual constituents from their alloys. Generated data are of importance within REACH, the new chemical policy of the European commission, where metal alloys erroneously are being treated as mixtures of chemical substances.

Ort, förlag, år, upplaga, sidor
2008. Vol. 144, nr 1-3, s. 455-461
Nationell ämneskategori
Korrosionsteknik
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URN: urn:nbn:se:kth:diva-17787DOI: 10.1007/s10661-007-0008-5ISI: 000258781700040PubMedID: 17985207Scopus ID: 2-s2.0-50849116511OAI: oai:DiVA.org:kth-17787DiVA, id: diva2:335832
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QC 20100525

Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2020-03-09Bibliografiskt granskad

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Herting, GunillaOdnevall Wallinder, IngerLeygraf, Christofer

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