Applications of scanning electrochemical microscopy (SECM) for local characterization of AZ31 surface during corrosion in a buffered media

Journal Article


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Abstract


  • Different modes of scanning electrochemical mapping (SECM) such as surface generation/tip collection (SG/TC), amperometry, AC-SECM and potentiometry were employed to characterize the active/passive domains, hydrogen gas (H2) evolution and local pH on a corroding surface of AZ31 in simulated biological fluid (SBF). It was found that the main domains of H2 evolution are associated with lower insulating properties of the surface as well as higher local pH. The near surface pH was found to be highly alkaline indicating that, even in a buffered solution such as SBF, the local pH on a corroding AZ31 surface can be significantly different to the bulk pH.

Authors


  •   Jamali , Sina S.
  •   Moulton, Simon E. (external author)
  •   Tallman, Dennis E. (external author)
  •   Forsyth, Maria (external author)
  •   Weber, Jan (external author)
  •   Wallace, Gordon G.

Publication Date


  • 2014

Citation


  • Jamali, S. S., Moulton, S. E., Tallman, D. E., Forsyth, M., Weber, J. & Wallace, G. G. (2014). Applications of scanning electrochemical microscopy (SECM) for local characterization of AZ31 surface during corrosion in a buffered media. Corrosion Science, 86 93-100.

Scopus Eid


  • 2-s2.0-84903480930

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2135&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1134

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 93

End Page


  • 100

Volume


  • 86

Place Of Publication


  • United Kingdom

Abstract


  • Different modes of scanning electrochemical mapping (SECM) such as surface generation/tip collection (SG/TC), amperometry, AC-SECM and potentiometry were employed to characterize the active/passive domains, hydrogen gas (H2) evolution and local pH on a corroding surface of AZ31 in simulated biological fluid (SBF). It was found that the main domains of H2 evolution are associated with lower insulating properties of the surface as well as higher local pH. The near surface pH was found to be highly alkaline indicating that, even in a buffered solution such as SBF, the local pH on a corroding AZ31 surface can be significantly different to the bulk pH.

Authors


  •   Jamali , Sina S.
  •   Moulton, Simon E. (external author)
  •   Tallman, Dennis E. (external author)
  •   Forsyth, Maria (external author)
  •   Weber, Jan (external author)
  •   Wallace, Gordon G.

Publication Date


  • 2014

Citation


  • Jamali, S. S., Moulton, S. E., Tallman, D. E., Forsyth, M., Weber, J. & Wallace, G. G. (2014). Applications of scanning electrochemical microscopy (SECM) for local characterization of AZ31 surface during corrosion in a buffered media. Corrosion Science, 86 93-100.

Scopus Eid


  • 2-s2.0-84903480930

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2135&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1134

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 93

End Page


  • 100

Volume


  • 86

Place Of Publication


  • United Kingdom