A Study of the Alloy Plating (I) Electo-plating of Cu-Sn Alloy

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  • 合金鍍金の研究（第1報）銅-錫合金析出

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We got the following results’ in our experiments on bronze plating in oxalate bath: (1) Current-density-voltage curves of the Cu plating differ according to the metalion concentrations and the temp. of the bath, but current-density-voltage curves of the Sn differ very little. (2) Current density-voltage curves of the bronze differ very little according to the metal ion concentrations and temp. of the bath, but they are peculiar to the bronze plating and very different from those of pure Cu of Sn plating. (3) The Cu contents of the deposites are increased as the metal ions are increased, and the values of Cu/Sn increase hyperbollically aginst the metal ion concentrations of the bath. (4) The values of Cu/Sn increase hyperbollically against the temp. (5) The deposites are rich in Cu at low current density and the values of Cu/Sn decrease as the current densitrises. They are related hyperbollically with each other.

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