Mechanistic studies of corrosion product flaking on copper and copper-based alloys in marine environments
2014 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 85, 15-25 p.Article in journal (Refereed) Published
The mechanism of corrosion product flaking on bare copper sheet and three copper-based alloys in chloride rich environments has been explored through field and laboratory exposures. The tendency for flaking is much more pronounced on Cu and Cu-4 wt%Sn than on Cu-15 wt%Zn and Cu-5 wt%Al-5 wt%Zn. This difference is explained by the initial formation of zinc and zinc-aluminum hydroxycarbonates on Cu15Zn and Cu5Al5Zn, which delays the formation of CuCl, a precursor of Cu-2(OH)(3)Cl. As a result, the observed volume expansion during transformation of CuCl to Cu-2(OH)(3)Cl, and concomitant corrosion product flaking, is less severe on Cu15Zn and Cu5Al5Zn than on Cu and Cu4Sn.
Place, publisher, year, edition, pages
2014. Vol. 85, 15-25 p.
Alloy, Copper, IR spectroscopy, Raman spectroscopy, SEM, Atmospheric corrosion
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-148339DOI: 10.1016/j.corsci.2014.03.028ISI: 000338388100003ScopusID: 2-s2.0-84901590805OAI: oai:DiVA.org:kth-148339DiVA: diva2:736246
QC 201408052014-08-052014-08-052014-09-15Bibliographically approved