カドミウム-スズ合金メッキの耐食性

電着合金に関する研究 (第12報)

抄録

Various compositions of cadmium-tin alloy electrodeposits were obtained from tetrafluoboric acid salt baths, to which several kinds of addition agents had been added.
The compositions of these alloys depended upon bath composition, temperature, current density, and the condition of stirring.
No red rust spots appeared on the cadmium-tin alloy deposits containing about 95% of cadmium, which had been electrodeposited on iron base. It was confirmed by salt spray test, CASS test, and exposure test that the same composition alloy had the highest corrosion resistance.
In comparison between corrosion resistances of alloy electrodeposits of about 10μ in thickness and zinc or cadmium deposits having the same thickness, it was proved by all the corrosion tests that the former had the highest corrosion resistance.