• Login
    View Item 
    •   DSpace Home
    • Journal Articles
    • School of Materials Engineering (Articles)
    • View Item
    •   DSpace Home
    • Journal Articles
    • School of Materials Engineering (Articles)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Electrochemical characterisation of hybrid activators for aluminium sacrificial anodes in natural sea water

    Thumbnail
    View/Open
    Electrochemical characterisation of hybrid activators for aluminium sacrificial anodes in natural sea water.pdf (37.5Kb)
    Date
    2013
    Author
    Mohd Subhi, Din Yati
    Mohd Nazree, Derman, Dr.
    Mahdi, Che Isa
    Mohd Moesli, Mohammad
    Hasril, Nain
    Metadata
    Show full item record
    Abstract
    This paper reports on the electrochemical behaviour of as-cast Al-Zn-Mg alloys activated by tin (Sn) and ruthenium dioxide (RuO2) in natural sea water. The potential and advantages of Sn and RuO2 as hybrid activators in Al-Zn-Mg alloys will be studied by using direct (DC) and alternating (AC) current electrochemical measurement techniques. The morphology of the alloys' corroded surface was studied using a scanning electron microscope (SEM). This study showed that the addition of 1.5%wt. Sn as an alloying element gave a stable corrosion free process that can be achieved after 2 ks of immersion. The results also showed that RuO2 catalytic coating applied on the surface of Al-Zn-Mg-Sn alloy slightly shifted the values of open circuit potential (OCP) towards a more electropositive direction as compared to Al-Zn-Mg-Sn without RuO2. The morphology of the corroded surface of Al-Zn-Mg-Sn alloy coated with RuO2 showed a more uniform corrosion attack with the formation of porous and fibrous mud-like cracks on the outer layer. This type of corrosion morphology features were believed to facilitate ionic species adsorption and diffusion through corrosion product layer at solution-alloy interface. Electrochemical impedance spectroscopy (EIS) showed that both Sn and RuO2 are capable to activate Al-Zn-Mg-Sn alloy in sea water by modifying the electrical properties of the oxide layer, reducing resistance to polarisation Rp values and thus, activating and accelerating the aluminium alloy dissolution process.
    URI
    http://www.myjurnal.my/public/article-view.php?id=74570
    http://dspace.unimap.edu.my:80/dspace/handle/123456789/34119
    Collections
    • Mohd Nazree Derman, Assoc. Prof. Dr. [66]
    • School of Materials Engineering (Articles) [553]

    Atmire NV

    Perpustakaan Tuanku Syed Faizuddin Putra (PTSFP) | Send Feedback
     

     

    Browse

    All of UniMAP Library Digital RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Atmire NV

    Perpustakaan Tuanku Syed Faizuddin Putra (PTSFP) | Send Feedback