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Preparation and electrochemical corrosion behaviour of 3D large-sized nanocrystalline copper bulk in solutions with chloride ions.
- Source :
-
Corrosion Engineering, Science & Technology . Sep2019, Vol. 54 Issue 6, p541-545. 5p. 5 Diagrams, 4 Graphs. - Publication Year :
- 2019
-
Abstract
- A 3D large-sized nanocrystalline (NC) copper bulk was prepared by inert gas condensation and in situ warm compress, the density of which was 99.51% of theoretical value. Electrochemical methods and XRD、EDS、SEM technique were used to investigate the anodic polarisation behaviour of NC copper in solutions with chloride ions. NC copper exhibited a different anodic polarisation behaviour from its coarse-grain (CG) counterpart in 0.47 wt-% NaCl solution. No second passivity was observed for NC copper, while there was a notable second passivity for CG copper. Compared with CG copper, the corrosion resistance of NC copper decreased. The anodic polarisation behaviour of NC copper changed significantly when 104 ppm Cl− was added in 0.3% Na2SO4 solution. Attributed to the CuCl protective film on NC copper, the critical current intensity decreased and the decreasing rate of anodic current intensity lowed notably in activity-passivity zone. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1478422X
- Volume :
- 54
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Corrosion Engineering, Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 137434613
- Full Text :
- https://doi.org/10.1080/1478422X.2019.1636176