Corrosion behaviour of multiwall carbon nanotube/magnesium composites in 3.5% NaCl

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Turhan CM, Li Q, Jha H, Singer R, Virtanen S
Zeitschrift: Electrochimica Acta
Jahr der Veröffentlichung: 2011
Band: 56
Heftnummer: 20
Seitenbereich: 7141-7148
ISSN: 0013-4686
Sprache: Englisch


Abstract

Corrosion behaviour of multiwall carbon nanotube (MWNT) modified pure magnesium (Mg) composites (MWNT/Mg) prepared by melt stirring technique was investigated by weight loss, H2 gas collection and pH measurements, as well as electrochemical methods such as open circuit potential (OCP) monitoring, polarisation curves and electrochemical impedance spectroscopy (EIS). Results show that the corrosion rate of MWNT/Mg composites is significantly higher than the corrosion rate of pure Mg. The corrosion rate of the composites also depends on the degree of dispersion of MWNTs during melt stirring process. The role of the MWNTs in increasing the corrosion rate clearly can be attributed to their high cathodic activity. Characterization of the corrosion product layers indicates that dispersion of MWNTs in the matrix leads to a more homogeneous coverage of the surface by corrosion products, and the lowest thickness of the corrosion product layer. The corrosion product layers in all cases provide poor protection of the surface. The corrosion rate of pure Mg as well as Mg/MWNT composites significantly increases during 1-week immersion; this effect is the strongest for the composite with dispersed nanotubes and can be attributed to the increased cathodic kinetics with time.


FAU-Autoren / FAU-Herausgeber

Li, Qianqian Dr.
Zentralinstitut für Neue Materialien und Prozesstechnik
Singer, Robert Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Turhan, Can Metehan Dr.
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)
Virtanen, Sannakaisa Prof. Dr.
Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Turhan, C.M., Li, Q., Jha, H., Singer, R., & Virtanen, S. (2011). Corrosion behaviour of multiwall carbon nanotube/magnesium composites in 3.5% NaCl. Electrochimica Acta, 56(20), 7141-7148. https://dx.doi.org/10.1016/j.electacta.2011.05.082

MLA:
Turhan, Can Metehan, et al. "Corrosion behaviour of multiwall carbon nanotube/magnesium composites in 3.5% NaCl." Electrochimica Acta 56.20 (2011): 7141-7148.

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Zuletzt aktualisiert 2019-14-03 um 12:02