Please use this identifier to cite or link to this item:
Title: Laser fabrication of W-reinforced Cu layers : I. Corrosion behavior in 3.5% NaCl solution and synthetic acid rain
Authors: Wong, PK
Kwok, CT
Man, HC 
Guo, D
Keywords: Alloys
Issue Date: 2016
Publisher: Elsevier
Source: Materials chemistry and physics, 2016, v. 181, p. 397-408 How to cite?
Journal: Materials chemistry and physics 
Abstract: Surface modification of commercially pure copper (cp Cu) with W powder was achieved by using a high power diode laser (HPDL) resulting in a microstructure of micron-sized W particles in a Cu matrix. In both 3.5 wt% NaCl solution and synthetic acid rain (SAR), the laser-fabricated specimens possess lower corrosion current density (I corr) than that of cp Cu despite the active shift in open-circuit potential (OCP). Although Cu is cathodic to W in 3.5 wt% NaCl solution, the Cu phase in the laser-fabricated specimens dominantly dissolves during the immersion test. This anomalous observation is possible because the OCP values of the laser-fabricated specimens, cp Cu and cp W are quite near to each other, while the anodic and cathodic current densities are all not negligible for the Cu and W phases at OCP. As the anodic current density of the Cu phase is greater than anodic current density of the W phase, the Cu phase corrodes more quickly than the W phase. For the laser-fabricated specimens immersed in SAR, the Cu phase is anodic and is selectively attacked while the W phase is passive due to the formation of WO3.
ISSN: 0254-0584
EISSN: 1879-3312
DOI: 10.1016/j.matchemphys.2016.06.075
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Jun 21, 2018

Page view(s)

Last Week
Last month
Citations as of Jun 18, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.