Corrosion behavior assessment of tin-lead and lead free solders exposed to fire smoke generated by burning polyvinyl chloride
作者： Qian Li , Xufei Liu , Shouxiang Lu
DOI: 10.1016/J.MATCHEMPHYS.2018.03.057
关键词:
摘要: Abstract The corrosion characteristics of tin-lead and three lead free solders (Sn-0.7Cu, Sn-3.0Ag Sn-3.0Ag-0.5Cu) exposed to fire smoke generated from polyvinyl chloride (PVC) were comparatively investigated through weight loss method surface characterization techniques. Results show that the rates each four examined rise with increase concentrations over concentration range 20 g/m3 140 g/m3. Sn-37Pb solder exhibits optimal resistance, while Sn-3.0Ag-0.5Cu has much poorer resistance in comparison former, even Sn-0.7Cu alloys. As indicated by SEM XRD, these may be related their microstructure. When alloys involve more intermetallic compounds, larger cathode areas are presented, weaker seems be. Further, XRD Raman spectrum reveal SnO PbCl2 main products solder, those primarily consist Sn21Cl16(OH)14O6 SnO. Accordingly, mechanisms further analyzed.
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