• effect of ni-coated carbon nanotubes on the corrosion behavior of sn-ag-cu solder

    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 771
    • تعداد پرسش و پاسخ ها: 0
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     in this study, the effect of ni-coated carbon nanotubes (ni-cnts) on the corrosion resistance of 95.8sn-3.5ag-0.7cu (sac) solder at ambient temperature in 3.5 wt.% nacl solution was investigated using the potentiodynamic polarization method. the corrosion products were analyzed by field-emission scanning electron microscopy (s4800), energy-dispersive spectroscopy, and x-ray diffraction. the results showed that addition of ni-cnts enhanced the corrosion resistance of the sac solder and that increasing the content of ni-cnts made the effect more evident. the mechanism of the corrosion resistance improvement is the formation of a compact corrosion layer of ni-cnts that provides an inert physical barrier to the initiation and development of corrosion. furthermore, in the corrosion microcell produced by the ni-cnts dispersed in the sac solder, the ni-cnts act as a third phase (electrode) which contributes to reducing the galvanic corrosion between sn anode and ag3sn cathode. hence, the corrosion resistance of the composite solders was improved.

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