An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater

M. C. Isa, A. R. Daud, M. Y. Ahmad, M. Daud, S. R. Shamsudin, N. Hassanuddin, M. S. Din Yati, M. M. Muhammad

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    In this paper, a study on the electrochemical behaviour and electrical properties of Al-Zn and Al-Zn-Sn alloys in tropical seawater using open circuit potential (OCP) measurement and electrochemical impedance spectroscopy (EIS) are reported. The results from both the OCP and EIS tests show that surface activation was observed in the Al-Zn alloy with the addition of 1.34 wt.% Sn which can be manifested by the shift of OCP values towards more electronegative direction. The EIS spectra of Al-Zn alloy exhibits a semicircle loop, while the EIS spectra for the Al-Zn-Sn alloy exhibits a semicircle with a semicircle inductive loop. The change in EIS spectra for Al-Zn-Sn alloy is correlated to the increase of surface activation resulting in a less stable passive layer. Equivalent circuits models were proposed to fit the impedance spectra and the corresponding electrical parameters with optimum values were deduced. The modulus impedance in the low frequency region or polarization resistance, R pol obtained for the Al-Zn-Sn alloy, R pol = 2.76 kΩ cm 2) is slightly decreased compared to the corresponding value of the Al-Zn alloy, R pol = 3.97 kΩ cm 2), indicating a considerable reduction in the protective capability of the oxide layer on the Al-Zn-Sn alloy. It appears that the heterogeneous oxide film and pores formed on the Al-Zn-Sn alloy play a key role in reducing total resistance to the flow of electron at the alloy-electrolyte interface.

    Original languageEnglish
    Title of host publicationKey Engineering Materials
    Pages284-292
    Number of pages9
    Volume510-511
    Edition1
    DOIs
    Publication statusPublished - 2012
    Event12th International Symposium on Advanced Materials, ISAM-2011 - Islamabad
    Duration: 26 Sep 201130 Sep 2011

    Publication series

    NameKey Engineering Materials
    Number1
    Volume510-511
    ISSN (Print)10139826

    Other

    Other12th International Symposium on Advanced Materials, ISAM-2011
    CityIslamabad
    Period26/9/1130/9/11

    Fingerprint

    Electrochemical impedance spectroscopy
    Seawater
    Networks (circuits)
    Chemical activation
    Equivalent circuits
    Oxides
    Electrolytes
    Oxide films
    Electric properties
    Polarization
    Electrons

    Keywords

    • Aluminium
    • Electrochemical impedance spectroscopy (EIS)
    • Equivalent circuit modelling
    • Open circuit potential (OCP)
    • Oxide layer

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Isa, M. C., Daud, A. R., Ahmad, M. Y., Daud, M., Shamsudin, S. R., Hassanuddin, N., ... Muhammad, M. M. (2012). An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater. In Key Engineering Materials (1 ed., Vol. 510-511, pp. 284-292). (Key Engineering Materials; Vol. 510-511, No. 1). https://doi.org/10.4028/www.scientific.net/KEM.510-511.284

    An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater. / Isa, M. C.; Daud, A. R.; Ahmad, M. Y.; Daud, M.; Shamsudin, S. R.; Hassanuddin, N.; Din Yati, M. S.; Muhammad, M. M.

    Key Engineering Materials. Vol. 510-511 1. ed. 2012. p. 284-292 (Key Engineering Materials; Vol. 510-511, No. 1).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Isa, MC, Daud, AR, Ahmad, MY, Daud, M, Shamsudin, SR, Hassanuddin, N, Din Yati, MS & Muhammad, MM 2012, An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater. in Key Engineering Materials. 1 edn, vol. 510-511, Key Engineering Materials, no. 1, vol. 510-511, pp. 284-292, 12th International Symposium on Advanced Materials, ISAM-2011, Islamabad, 26/9/11. https://doi.org/10.4028/www.scientific.net/KEM.510-511.284
    Isa MC, Daud AR, Ahmad MY, Daud M, Shamsudin SR, Hassanuddin N et al. An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater. In Key Engineering Materials. 1 ed. Vol. 510-511. 2012. p. 284-292. (Key Engineering Materials; 1). https://doi.org/10.4028/www.scientific.net/KEM.510-511.284
    Isa, M. C. ; Daud, A. R. ; Ahmad, M. Y. ; Daud, M. ; Shamsudin, S. R. ; Hassanuddin, N. ; Din Yati, M. S. ; Muhammad, M. M. / An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater. Key Engineering Materials. Vol. 510-511 1. ed. 2012. pp. 284-292 (Key Engineering Materials; 1).
    @inproceedings{0168f205f58044dfb1d99d199cc5ddab,
    title = "An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater",
    abstract = "In this paper, a study on the electrochemical behaviour and electrical properties of Al-Zn and Al-Zn-Sn alloys in tropical seawater using open circuit potential (OCP) measurement and electrochemical impedance spectroscopy (EIS) are reported. The results from both the OCP and EIS tests show that surface activation was observed in the Al-Zn alloy with the addition of 1.34 wt.{\%} Sn which can be manifested by the shift of OCP values towards more electronegative direction. The EIS spectra of Al-Zn alloy exhibits a semicircle loop, while the EIS spectra for the Al-Zn-Sn alloy exhibits a semicircle with a semicircle inductive loop. The change in EIS spectra for Al-Zn-Sn alloy is correlated to the increase of surface activation resulting in a less stable passive layer. Equivalent circuits models were proposed to fit the impedance spectra and the corresponding electrical parameters with optimum values were deduced. The modulus impedance in the low frequency region or polarization resistance, R pol obtained for the Al-Zn-Sn alloy, R pol = 2.76 kΩ cm 2) is slightly decreased compared to the corresponding value of the Al-Zn alloy, R pol = 3.97 kΩ cm 2), indicating a considerable reduction in the protective capability of the oxide layer on the Al-Zn-Sn alloy. It appears that the heterogeneous oxide film and pores formed on the Al-Zn-Sn alloy play a key role in reducing total resistance to the flow of electron at the alloy-electrolyte interface.",
    keywords = "Aluminium, Electrochemical impedance spectroscopy (EIS), Equivalent circuit modelling, Open circuit potential (OCP), Oxide layer",
    author = "Isa, {M. C.} and Daud, {A. R.} and Ahmad, {M. Y.} and M. Daud and Shamsudin, {S. R.} and N. Hassanuddin and {Din Yati}, {M. S.} and Muhammad, {M. M.}",
    year = "2012",
    doi = "10.4028/www.scientific.net/KEM.510-511.284",
    language = "English",
    isbn = "9783037854112",
    volume = "510-511",
    series = "Key Engineering Materials",
    number = "1",
    pages = "284--292",
    booktitle = "Key Engineering Materials",
    edition = "1",

    }

    TY - GEN

    T1 - An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn alloys in tropical seawater

    AU - Isa, M. C.

    AU - Daud, A. R.

    AU - Ahmad, M. Y.

    AU - Daud, M.

    AU - Shamsudin, S. R.

    AU - Hassanuddin, N.

    AU - Din Yati, M. S.

    AU - Muhammad, M. M.

    PY - 2012

    Y1 - 2012

    N2 - In this paper, a study on the electrochemical behaviour and electrical properties of Al-Zn and Al-Zn-Sn alloys in tropical seawater using open circuit potential (OCP) measurement and electrochemical impedance spectroscopy (EIS) are reported. The results from both the OCP and EIS tests show that surface activation was observed in the Al-Zn alloy with the addition of 1.34 wt.% Sn which can be manifested by the shift of OCP values towards more electronegative direction. The EIS spectra of Al-Zn alloy exhibits a semicircle loop, while the EIS spectra for the Al-Zn-Sn alloy exhibits a semicircle with a semicircle inductive loop. The change in EIS spectra for Al-Zn-Sn alloy is correlated to the increase of surface activation resulting in a less stable passive layer. Equivalent circuits models were proposed to fit the impedance spectra and the corresponding electrical parameters with optimum values were deduced. The modulus impedance in the low frequency region or polarization resistance, R pol obtained for the Al-Zn-Sn alloy, R pol = 2.76 kΩ cm 2) is slightly decreased compared to the corresponding value of the Al-Zn alloy, R pol = 3.97 kΩ cm 2), indicating a considerable reduction in the protective capability of the oxide layer on the Al-Zn-Sn alloy. It appears that the heterogeneous oxide film and pores formed on the Al-Zn-Sn alloy play a key role in reducing total resistance to the flow of electron at the alloy-electrolyte interface.

    AB - In this paper, a study on the electrochemical behaviour and electrical properties of Al-Zn and Al-Zn-Sn alloys in tropical seawater using open circuit potential (OCP) measurement and electrochemical impedance spectroscopy (EIS) are reported. The results from both the OCP and EIS tests show that surface activation was observed in the Al-Zn alloy with the addition of 1.34 wt.% Sn which can be manifested by the shift of OCP values towards more electronegative direction. The EIS spectra of Al-Zn alloy exhibits a semicircle loop, while the EIS spectra for the Al-Zn-Sn alloy exhibits a semicircle with a semicircle inductive loop. The change in EIS spectra for Al-Zn-Sn alloy is correlated to the increase of surface activation resulting in a less stable passive layer. Equivalent circuits models were proposed to fit the impedance spectra and the corresponding electrical parameters with optimum values were deduced. The modulus impedance in the low frequency region or polarization resistance, R pol obtained for the Al-Zn-Sn alloy, R pol = 2.76 kΩ cm 2) is slightly decreased compared to the corresponding value of the Al-Zn alloy, R pol = 3.97 kΩ cm 2), indicating a considerable reduction in the protective capability of the oxide layer on the Al-Zn-Sn alloy. It appears that the heterogeneous oxide film and pores formed on the Al-Zn-Sn alloy play a key role in reducing total resistance to the flow of electron at the alloy-electrolyte interface.

    KW - Aluminium

    KW - Electrochemical impedance spectroscopy (EIS)

    KW - Equivalent circuit modelling

    KW - Open circuit potential (OCP)

    KW - Oxide layer

    UR - http://www.scopus.com/inward/record.url?scp=84861438276&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84861438276&partnerID=8YFLogxK

    U2 - 10.4028/www.scientific.net/KEM.510-511.284

    DO - 10.4028/www.scientific.net/KEM.510-511.284

    M3 - Conference contribution

    SN - 9783037854112

    VL - 510-511

    T3 - Key Engineering Materials

    SP - 284

    EP - 292

    BT - Key Engineering Materials

    ER -