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Electrochemical detection of cupric ions with boron-doped diamond electrode for corrosion monitoring

Electrochemical detection of cupric ions with boron-doped diamond electrode for corrosion monitoring
Electrochemical detection of cupric ions with boron-doped diamond electrode for corrosion monitoring
Corrosion induced structural failures continue to be a costly problem in many industrial situations, and the development of robust corrosion sensing systems for structural health integrity monitoring is still a demanding challenge. The applicability of corrosion monitoring of copper alloys using a boron-doped diamond electrode (BDD) has been performed based on determination of copper ions within localised corrosion microenvironments. The electrochemical behaviour of copper ions on the BDD electrode surface were first reported in details in 0.6 M NaCl aqueous solution, and the results revealed that the electrochemical processes of copper ions on the BDD electrode proceed as two successive single electron transfer steps producing two well-separated pairs of peaks in cyclic voltammograms in the chloride ion containing electrolyte solutions. Compared with perchlorate and sulphate ions, chloride ions were observed with a significant stabilization effect on copper ions via the formation of complex, thus having two well-separated pairs of peaks in the obtained cyclic voltammograms on the BDD electrode in the chloride ion electrolyte solution. The apparent rate constant for the redox couple of Cu(II)/Cu(I) in chloride ion electrolyte was determined as 0.94 × 10–6 cm s–1 by using quasi-steady polarisation technique, thus signifying a quasi-reversible electron transfer process of Cu(II)/Cu(I). Moreover, the differential pulse voltammetric results exhibited the BDD electrode is promising for corrosion monitoring of copper alloys with an excellent relationship between peak current and concentration of copper ions without significant interference from the commonly presented metal ions within the simulated marine corrosion environments.
electrochemical sensing, boron-doped diamond, marine corrosion monitoring, differential pulse voltammetry
Neodo, Stefano
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Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wharton, Julian A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Cranny, Andy
2ebc2ccb-7d3e-4a6a-91ac-9f089741939e
Harris, Nick
237cfdbd-86e4-4025-869c-c85136f14dfd
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Stokes, K.R.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695
Neodo, Stefano
5d5dabb5-be7e-4ba6-b05c-6b192f4639a0
Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wharton, Julian A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Cranny, Andy
2ebc2ccb-7d3e-4a6a-91ac-9f089741939e
Harris, Nick
237cfdbd-86e4-4025-869c-c85136f14dfd
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Stokes, K.R.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695

(2015) Electrochemical detection of cupric ions with boron-doped diamond electrode for corrosion monitoring. EMCR2015: 11th International Symposium on Electrochemical Methods in Corrosion Research, Portugal. (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

Corrosion induced structural failures continue to be a costly problem in many industrial situations, and the development of robust corrosion sensing systems for structural health integrity monitoring is still a demanding challenge. The applicability of corrosion monitoring of copper alloys using a boron-doped diamond electrode (BDD) has been performed based on determination of copper ions within localised corrosion microenvironments. The electrochemical behaviour of copper ions on the BDD electrode surface were first reported in details in 0.6 M NaCl aqueous solution, and the results revealed that the electrochemical processes of copper ions on the BDD electrode proceed as two successive single electron transfer steps producing two well-separated pairs of peaks in cyclic voltammograms in the chloride ion containing electrolyte solutions. Compared with perchlorate and sulphate ions, chloride ions were observed with a significant stabilization effect on copper ions via the formation of complex, thus having two well-separated pairs of peaks in the obtained cyclic voltammograms on the BDD electrode in the chloride ion electrolyte solution. The apparent rate constant for the redox couple of Cu(II)/Cu(I) in chloride ion electrolyte was determined as 0.94 × 10–6 cm s–1 by using quasi-steady polarisation technique, thus signifying a quasi-reversible electron transfer process of Cu(II)/Cu(I). Moreover, the differential pulse voltammetric results exhibited the BDD electrode is promising for corrosion monitoring of copper alloys with an excellent relationship between peak current and concentration of copper ions without significant interference from the commonly presented metal ions within the simulated marine corrosion environments.

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More information

Accepted/In Press date: 4 March 2015
Venue - Dates: EMCR2015: 11th International Symposium on Electrochemical Methods in Corrosion Research, Portugal, 2015-03-04
Keywords: electrochemical sensing, boron-doped diamond, marine corrosion monitoring, differential pulse voltammetry
Organisations: nCATS Group

Identifiers

Local EPrints ID: 376469
URI: http://eprints.soton.ac.uk/id/eprint/376469
PURE UUID: 1b65921e-7e36-4802-922f-9aa66880b66b
ORCID for Mengyan Nie: ORCID iD orcid.org/0000-0002-7758-760X
ORCID for Julian A. Wharton: ORCID iD orcid.org/0000-0002-3439-017X
ORCID for Nick Harris: ORCID iD orcid.org/0000-0003-4122-2219
ORCID for R.J.K. Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 29 Apr 2015 11:27
Last modified: 13 Jun 2019 00:34

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