光沢非シアン化銀めっきのアノード挙動

Abstract

In a potassium sulfate solution, the polarization curves of silver electrodeposited from an electrolyte with different additives show that the amount of codeposited sulfur in the electrodeposited material increases with the amount of sodium thiosulfate. The current density thus increases in both the active dissolution region and the passive state. Adding, zinc ions, reduces both the amount of codeposited sulfur and the silver dissolution. Because of the codeposition of triethylene tetramine, the active dissolution of silver is also reduced. These phenomena, especially when triethylene tetramine, sodium thiosulfate, and zinc ions are added simultaneously, are especially interesting.