Abstract
Tin-nickel alloy was electrodeposited from pyrophosphate bath containing α-aminoacid. Bath composition and operating conditions were as follows;
Bath composition Operating conditions SnCl2·2H2O 0.125M current density 0.5-1.5A/dm2 NiCl2·6H2O 0.125M Ph 8.0 K4P2O7·3H2O 0.5M temperature 50°C glycine 20g/l
Tin-nickel alloy (72:28) was obtained with high current efficiency (92% at a current density of 1A/dm2), and good throwing power. The composition of the tin-nickel alloy does not seem to vary with the small changes of pH and temperature of the plating bath, and of the concentration of potassium pyrophosphate.
