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Journal of Failure Analysis and Prevention

, Volume 19, Issue 1, pp 250–257 | Cite as

Investigation into the Corrosion Behavior of Copper/Aluminum Associated with Electric/Electronic Devices in Marine Environment

  • X. Joseph RajEmail author
  • N. Rajendran
Technical Article---Peer-Reviewed
  • 28 Downloads

Abstract

Corrosion behavior of copper/aluminum was investigated using cyclic wet/dry corrosion test in natural seawater by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM). The higher charge transfer resistance (Rct) and film resistance (Rf) at 15 d of w/d cyclic corrosion test were shown by EIS plots. The anodic surface releases Al3+ and Cu+ ions into the electrolyte, and the cathodic surface consumes dissolved oxygen. These ions and dissolved oxygen are detected by applying appropriate tip potential in SECM technique. The results showed that the corrosion activity of aluminum was accelerated due to the potential difference of the sample. The scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) analysis showed the enrichment of Cu and Al in corrosion products at the surface of Cu/Al sample after electrochemical analysis. The focused ion beam/transmission electron microscopy (FIB-TEM) analysis confirmed the presence of the nanoscale oxide layers containing Cu and Al in the corrosion product of the Cu/Al sample. The formation of corrosion products has a beneficial effect on corrosion resistance of Cu/Al sample.

Keywords

SECM Galvanic corrosion EIS SEM Copper Aluminum 

Notes

Acknowledgments

The authors thank Prof. Dr. A. Abudhahir, Prof. P. Sarasu and the Management of Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai-600 062, Tamil Nadu, India, for their constant encouragement and constructive suggestions regarding this research.

References

  1. 1.
    S.T. Elola, T.F. Otero, A. Porro, Evolution of the pitting of aluminum exposed to the atmosphere. Corrosion 48, 854–864 (1992)CrossRefGoogle Scholar
  2. 2.
    J. Damborenea, A. Conde, Comparison of accelerated and atmospheric exposure tests for corrosion’ of aluminium alloys. Br. Corros. J. 30, 292–296 (1995)CrossRefGoogle Scholar
  3. 3.
    R. Vera, D. Delgado, B. Rosales, Effect of unusually elevated SO2 atmospheric content on the corrosion of high power electrical conductors—Part 3. Pure copper. Corros. Sci. 50, 1080–1098 (2008)CrossRefGoogle Scholar
  4. 4.
    M. Arca, M.V. Mirkin, A.J. Bard, Polymer films on electrodes. 26. Study of ion transport and electron transfer at polypyrrole films by scanning electrochemical microscopy. J. Phys. Chem. 99, 5040–5050 (1995)CrossRefGoogle Scholar
  5. 5.
    A.M. Simoes, A.C. Bastos, M.G. Ferreira, Y. González-García, S. Gonzalez, R.M. Souto, Use of SVET and SECM to study the galvanic corrosion of an iron–zinc cell. Corros. Sci. 49, 726–739 (2007)CrossRefGoogle Scholar
  6. 6.
    A.C. Bastos, A.M. Simoes, S. Gonzalez, Y. González-García, R.M. Souto, Application of the scanning electrochemical microscope to the examination of organic coatings on metallic substrates. Prog. Org. Coat 53, 177–182 (2005)CrossRefGoogle Scholar
  7. 7.
    R.M. Souto, Y. González-García, S. González, Evaluation of the corrosion performance of coil-coated steel sheet as studied by scanning electrochemical microscopy. Corros. Sci. 50, 1637–1643 (2008)CrossRefGoogle Scholar
  8. 8.
    R.M. Souto, Y. González-García, J. Izquierdo, S. Gonzalez, Examination of organic coatings on metallic substrates by scanning electrochemical microscopy in feedback mode: Revealing the early stages of coating breakdown in corrosive environments. Corros. Sci. 52, 748–753 (2010)CrossRefGoogle Scholar
  9. 9.
    X. JosephRaj, N. Rajendran, Application of EIS and SECM studies for investigation of anticorrosion properties of epoxy coatings containing ZrO2 nanoparticles on mild steel in 3.5% NaCl solution. J. Fail. Anal. Preven. 16, 1082–1091 (2016)CrossRefGoogle Scholar
  10. 10.
    A.C. Bastos, A.M. Simoes, S. Gonzalez, R.M. Souto, Imaging concentration profiles of redox-active species in open-circuit corrosion processes with the scanning electrochemical microscope. Electrochem. Commun. 6, 1212–1215 (2004)CrossRefGoogle Scholar
  11. 11.
    T.E. Lister, J.P. Patrick, The effect of localized electric fields on the detection of dissolved sulfur species from Type 304 stainless steel using scanning electrochemical microscopy. Electrochim. Acta. 48, 2371–2378 (2003)CrossRefGoogle Scholar
  12. 12.
    E. Kathrin, E. Mathieu, S. Albert, S. Wolfgang, Constant-distance mode AC-SECM for the visualisation of corrosion pits. Electrochem. Commun. 9, 1793–1797 (2007)CrossRefGoogle Scholar
  13. 13.
    E. Tada, S. Satoh, H. Kaneko, The spatial distribution of Zn2+ during galvanic corrosion of a Zn/steel couple. Electrochim. Acta. 49, 2279–2285 (2004)CrossRefGoogle Scholar

Copyright information

© ASM International 2019

Authors and Affiliations

  1. 1.Department of ChemistryVel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and TechnologyChennaiIndia
  2. 2.Department of ChemistryAnna UniversityChennaiIndia

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