The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution

M. C. Isa, M. Y. Ahmad, A. R. Daud, M. Daud

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

    4 Citations (Scopus)

    Abstract

    Electrochemical behaviour of cast Al-Zn alloys in natural chloride solution were investigated by potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). Results from open circuit potential (OCP) measurement against immersion time showed a stable free corrosion process was achieved after 15 kiloseconds and alloys with more Sn contents had shifted OCP value towards more negative direction. Potentiodynamic polarisation curves showed that the corrosion potential (Ecorr) of aluminium alloys with Sn addition were much active compared to alloy without Sn. The anodic curves were characterized by no sign of passive current due active dissolution on the surface of the Al-Zn-Sn alloy. SEM images show that the presence of Sn in Al- Zn alloys produces better and uniform dissolution morphology. EIS results confirm that the presence of Sn is beneficial in improving anodic dissolution of Al-Zn alloys by reducing resistance to polarization (Rp). The presence of 0.1%wt. Sn in Al-Zn alloy has been found to be useful in activating electrochemical reaction at alloy-solution interface based on inductive loop in EIS diagram.

    Original languageEnglish
    Title of host publicationKey Engineering Materials
    Pages322-329
    Number of pages8
    Volume442
    DOIs
    Publication statusPublished - 2010
    Event11th International Symposium on Advanced Materials, ISAM-2009 - Islamabad
    Duration: 8 Aug 200912 Aug 2009

    Publication series

    NameKey Engineering Materials
    Volume442
    ISSN (Print)10139826

    Other

    Other11th International Symposium on Advanced Materials, ISAM-2009
    CityIslamabad
    Period8/8/0912/8/09

    Fingerprint

    Chlorides
    Electrochemical impedance spectroscopy
    Dissolution
    Corrosion
    Networks (circuits)
    Potentiodynamic polarization
    Aluminum alloys
    Polarization
    Scanning electron microscopy

    Keywords

    • Aluminium alloys
    • Electrochemical impedance spectroscopy (EIS)
    • Potentiodynamic

    ASJC Scopus subject areas

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

    Cite this

    Isa, M. C., Ahmad, M. Y., Daud, A. R., & Daud, M. (2010). The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution. In Key Engineering Materials (Vol. 442, pp. 322-329). (Key Engineering Materials; Vol. 442). https://doi.org/10.4028/www.scientific.net/KEM.442.322

    The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution. / Isa, M. C.; Ahmad, M. Y.; Daud, A. R.; Daud, M.

    Key Engineering Materials. Vol. 442 2010. p. 322-329 (Key Engineering Materials; Vol. 442).

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

    Isa, MC, Ahmad, MY, Daud, AR & Daud, M 2010, The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution. in Key Engineering Materials. vol. 442, Key Engineering Materials, vol. 442, pp. 322-329, 11th International Symposium on Advanced Materials, ISAM-2009, Islamabad, 8/8/09. https://doi.org/10.4028/www.scientific.net/KEM.442.322
    Isa MC, Ahmad MY, Daud AR, Daud M. The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution. In Key Engineering Materials. Vol. 442. 2010. p. 322-329. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.442.322
    Isa, M. C. ; Ahmad, M. Y. ; Daud, A. R. ; Daud, M. / The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution. Key Engineering Materials. Vol. 442 2010. pp. 322-329 (Key Engineering Materials).
    @inproceedings{a4a5bf759d0f4ae88bec16d485afc9e3,
    title = "The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution",
    abstract = "Electrochemical behaviour of cast Al-Zn alloys in natural chloride solution were investigated by potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). Results from open circuit potential (OCP) measurement against immersion time showed a stable free corrosion process was achieved after 15 kiloseconds and alloys with more Sn contents had shifted OCP value towards more negative direction. Potentiodynamic polarisation curves showed that the corrosion potential (Ecorr) of aluminium alloys with Sn addition were much active compared to alloy without Sn. The anodic curves were characterized by no sign of passive current due active dissolution on the surface of the Al-Zn-Sn alloy. SEM images show that the presence of Sn in Al- Zn alloys produces better and uniform dissolution morphology. EIS results confirm that the presence of Sn is beneficial in improving anodic dissolution of Al-Zn alloys by reducing resistance to polarization (Rp). The presence of 0.1{\%}wt. Sn in Al-Zn alloy has been found to be useful in activating electrochemical reaction at alloy-solution interface based on inductive loop in EIS diagram.",
    keywords = "Aluminium alloys, Electrochemical impedance spectroscopy (EIS), Potentiodynamic",
    author = "Isa, {M. C.} and Ahmad, {M. Y.} and Daud, {A. R.} and M. Daud",
    year = "2010",
    doi = "10.4028/www.scientific.net/KEM.442.322",
    language = "English",
    isbn = "0878492682",
    volume = "442",
    series = "Key Engineering Materials",
    pages = "322--329",
    booktitle = "Key Engineering Materials",

    }

    TY - GEN

    T1 - The effect of Sn on the impedance behaviour of Al-Zn alloys in natural chloride solution

    AU - Isa, M. C.

    AU - Ahmad, M. Y.

    AU - Daud, A. R.

    AU - Daud, M.

    PY - 2010

    Y1 - 2010

    N2 - Electrochemical behaviour of cast Al-Zn alloys in natural chloride solution were investigated by potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). Results from open circuit potential (OCP) measurement against immersion time showed a stable free corrosion process was achieved after 15 kiloseconds and alloys with more Sn contents had shifted OCP value towards more negative direction. Potentiodynamic polarisation curves showed that the corrosion potential (Ecorr) of aluminium alloys with Sn addition were much active compared to alloy without Sn. The anodic curves were characterized by no sign of passive current due active dissolution on the surface of the Al-Zn-Sn alloy. SEM images show that the presence of Sn in Al- Zn alloys produces better and uniform dissolution morphology. EIS results confirm that the presence of Sn is beneficial in improving anodic dissolution of Al-Zn alloys by reducing resistance to polarization (Rp). The presence of 0.1%wt. Sn in Al-Zn alloy has been found to be useful in activating electrochemical reaction at alloy-solution interface based on inductive loop in EIS diagram.

    AB - Electrochemical behaviour of cast Al-Zn alloys in natural chloride solution were investigated by potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). Results from open circuit potential (OCP) measurement against immersion time showed a stable free corrosion process was achieved after 15 kiloseconds and alloys with more Sn contents had shifted OCP value towards more negative direction. Potentiodynamic polarisation curves showed that the corrosion potential (Ecorr) of aluminium alloys with Sn addition were much active compared to alloy without Sn. The anodic curves were characterized by no sign of passive current due active dissolution on the surface of the Al-Zn-Sn alloy. SEM images show that the presence of Sn in Al- Zn alloys produces better and uniform dissolution morphology. EIS results confirm that the presence of Sn is beneficial in improving anodic dissolution of Al-Zn alloys by reducing resistance to polarization (Rp). The presence of 0.1%wt. Sn in Al-Zn alloy has been found to be useful in activating electrochemical reaction at alloy-solution interface based on inductive loop in EIS diagram.

    KW - Aluminium alloys

    KW - Electrochemical impedance spectroscopy (EIS)

    KW - Potentiodynamic

    UR - http://www.scopus.com/inward/record.url?scp=77955444745&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77955444745&partnerID=8YFLogxK

    U2 - 10.4028/www.scientific.net/KEM.442.322

    DO - 10.4028/www.scientific.net/KEM.442.322

    M3 - Conference contribution

    AN - SCOPUS:77955444745

    SN - 0878492682

    SN - 9780878492688

    VL - 442

    T3 - Key Engineering Materials

    SP - 322

    EP - 329

    BT - Key Engineering Materials

    ER -