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Laser fabrication of W-reinforced Cu layers: I. Corrosion behavior in 3.5% NaCl solution and synthetic acid rain
P.K. Wong1; C.T. Kwok1,2; H.C. Man3; D. Guo1
2016-09-15
Source PublicationMaterials Chemistry and Physics
ISSN0254-0584
Volume181Pages:397-408
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 (Icorr) 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.

KeywordAlloys Coatings Corrosion Sem
DOIhttps://doi.org/10.1016/j.matchemphys.2016.06.075
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000381530100048
PublisherELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
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Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorC.T. Kwok
Affiliation1.Department of Electromechanical Engineering, University of Macau, China
2.Institute of Applied Physics and Materials Engineering, University of Macau, China
3.Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau;  INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
P.K. Wong,C.T. Kwok,H.C. Man,et al. Laser fabrication of W-reinforced Cu layers: I. Corrosion behavior in 3.5% NaCl solution and synthetic acid rain[J]. Materials Chemistry and Physics,2016,181:397-408.
APA P.K. Wong,C.T. Kwok,H.C. Man,&D. Guo.(2016).Laser fabrication of W-reinforced Cu layers: I. Corrosion behavior in 3.5% NaCl solution and synthetic acid rain.Materials Chemistry and Physics,181,397-408.
MLA P.K. Wong,et al."Laser fabrication of W-reinforced Cu layers: I. Corrosion behavior in 3.5% NaCl solution and synthetic acid rain".Materials Chemistry and Physics 181(2016):397-408.
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