Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 3, Pages 1235-1241Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2011.09.080
Keywords
Atmospheric corrosion; Brass (Cu-20Zn); Humid air; Surface analysis; Cu2O; ZnO
Categories
Funding
- Chinese Scholarship Council (CSC)
- Swedish Research Council (VR)
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Complementary surface and near-surface analytical techniques have been used to explore a brass (Cu-20Zn) surface before, during, and after exposure in air at 90% relative humidity. Volta potential variations along the unexposed surface are attributed to variations in surface composition and resulted in an accelerated localized growth of ZnO and a retarded more uniform growth of an amorphous Cu2O-like oxide. After 3 days the duplex oxide has a total mass of 1.3 mu g/cm(2), with improved corrosion protective properties compared to the oxides grown on pure Cu or Zn. A schematic model for the duplex oxide growth on brass is presented. (C) 2011 Elsevier B.V. All rights reserved.
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