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    The effect of oxygen and hydroxide ion on electrochemical leaching behavior of tin

    Access Status
    Open access via publisher
    Authors
    Kim, S.
    Lee, J.
    Jeong, J.
    Yoo, Kyoungkeun
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Kim, S. and Lee, J. and Jeong, J. and Yoo, K. 2012. The effect of oxygen and hydroxide ion on electrochemical leaching behavior of tin. Materials Transactions. 53 (12): pp. 2208-2210.
    Source Title
    Materials Transactions
    DOI
    10.2320/matertrans.M2012311
    ISSN
    1345-9678
    School
    Dept of Mining Eng & Metallurgical Eng
    URI
    http://hdl.handle.net/20.500.11937/53405
    Collection
    • Curtin Research Publications
    Abstract

    The dissolution of tin from waste Pb-free solder was electrochemically investigated in NaOH solution. Two oxidation peaks were observed in a cyclic voltammetry test in 1 kmolm-3 NaOH solution at less than 45°C, and the peaks indicate the oxidation of tin to Sn2+ and Sn 2+ to Sn4+, whereas only one peak was observed at 75°C resulting from the direct oxidation of tin to Sn4+. The increase in NaOH concentration and the introduction of oxygen enhanced the dissolution of tin in NaOH solution with less than 0.5 kmolm-3 whereas that of tin decreased with increasing NaOH concentration further to 1.5 kmolm-3 and the decrease in the dissolution of tin was accelerated by introducing oxygen. An optimum waste solder alkaline electrolysis process was found to be at more than 75°C and around 0.5 kmolm-3 NaOH based on the cyclic voltammetry and constant current experiment.

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