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Investigation of Copper Corrosion Inhibition with Frequency-Dependent Alternating-Current Scanning Electrochemical Microscopy

  1. Dr. Juan José Santana1,
  2. Dr. Maike Pähler2,
  3. Prof. Wolfgang Schuhmann2,*,
  4. Prof. Ricardo M. Souto1,3,4,*

Article first published online: 21 MAY 2012

DOI: 10.1002/cplu.201200091

Issue

ChemPlusChem

ChemPlusChem

Special Issue: Board Members Issue

Volume 77, Issue 8, pages 707–712, August 2012

Additional Information

How to Cite

Santana, J. J., Pähler, M., Schuhmann, W. and Souto, R. M. (2012), Investigation of Copper Corrosion Inhibition with Frequency-Dependent Alternating-Current Scanning Electrochemical Microscopy. ChemPlusChem, 77: 707–712. doi: 10.1002/cplu.201200091

Author Information

  1. 1

    Department of Physical Chemistry, University of La Laguna, 38200 La Laguna, Tenerife, Canary Islands (Spain)

  2. 2

    Analytische Chemie-Elektroanalytik & Sensorik, Ruhr-Universität Bochum, 44780 Bochum (Germany)

  3. 3

    Instituto de Materiales y Nanotecnologías, University of La Laguna, 38200 La Laguna, Tenerife, Canary Islands (Spain)

  4. 4

    On leave from: Department of Process Engineering, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Canary Islands (Spain)

*Analytische Chemie-Elektroanalytik & Sensorik, Ruhr-Universität Bochum, 44780 Bochum (Germany)

Publication History

  1. Issue published online: 9 AUG 2012
  2. Article first published online: 21 MAY 2012
  3. Manuscript Received: 16 APR 2012

Funded by

  • German Academic Exchange Service
  • Spanish Ministry of Science and Innovation. Grant Number: HA2006–0077
  • DFG. Grant Numbers: SFB459 (A5), SCHU929/9–1
  • Ministry of Science and Innovation (Madrid, Spain)
  • European Regional Development Fund (Brussels, Belgium). Grant Number: CTQ2009–12459

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Keywords:

  • benzotriazoles;
  • copper;
  • corrosion inhibition;
  • scanning probe microscopy;
  • surface chemistry

Abstract

Alternating current scanning electrochemical microscopy (AC-SECM) is used to investigate the inhibition of copper corrosion by four potential inhibitors, namely benzotriazole (BTAH), 5-methyl-benzotriazole (MBTAH), 2-mercaptobenzimidazole (MBI), and ethyl xanthate (EX). It is shown that the formation of inhibitor films on the metal can be followed from the decrease of the substrate’s local electrochemical activity associated with the formation of inhibitor-containing surface layers. Sensitive imaging can be performed that accounts for changes in electrochemical activity of the modified surfaces, as well as for their corrosive attack from the environment. AC-SECM is shown to be a powerful technique for the investigation of corrosion processes.

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