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日本一项专利(NO63157821)提出把镀锡金属置于碱溶液中进行阳极处理。在电流密度100～300安/米~2、电解温度65～70℃、时间16～28小时条件下进行电解。苛性钠量保持在50～150克/升范围内,来回收大部分金属锡。然后,把阳极料置于标准温度的溶液中达5～10分钟。此溶液含有FeCl_3 10～15克/升和HCl 10～70克/升。在这种条件下残存的焊料和锡被溶解。此法回收锡的成本低。
A patent in Japan (NO63157821) proposed that the tin-plated metal be subjected to anodic treatment in an alkaline solution. In the current density of 100 ~ 300A / m ~ 2, electrolysis temperature of 65 ~ 70 ℃, the time of 16 to 28 hours under the conditions of electrolysis. The amount of caustic soda is maintained in the range of 50-150 g / l to recover most of the metallic tin. Then, the anode material is placed in a standard temperature solution for 5 to 10 minutes. This solution contains 10 ~ 15 g / L FeCl 3 and 10 ~ 70 g / L HCl. Solder and tin remaining in this condition are dissolved. This method of recovery of tin low cost.