The elution characteristics of lead from the printed circuit boards in the MD players were investigated, and it was confirmed that the amount of lead eluted from the printed circuit board using Sn
96- Ag
2.5-Bi
1.0-Cu
0.5 solder was smaller than that from the printed circuit board using Sn
63-Pb
37 solder. The elution of elements (tin, bismuth, silver, copper and lead) from five kinds of lead-free solders and the lead solder were measured under various pseudo-environments (pure water, 3.5 wt% salt solution and pH 3 acid solution) . These results indicated that the amount of each element eluted from several solders was especially large under the acid solution.
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