ヒダントインおよびヒダントイン誘導体を用いた非シアン系銀メッキ浴 [in Japanese] Noncyanide Silver Plating Solution Using Hydantoin and Hydantoin Derivatives [in Japanese]
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We studied silver-hydantoin noncyanide silver plating solution to determine the effect of potassium chloride, potassium sulfite, and potassium thiosulfate on deposit appearance using SEM imaging, brightness, and X-ray diffraction.<br>We also studied the effects of hydantoin, 1-methylhydantoin, and 5, 5-dimethylhydantoin on limiting current density using a potential-current curve.<br>Adding potassium chloride yielded a white, homogenized rock-like appearance. Potassium sulfite and potassium thiosulfate yielded a semibright apearance.<br>Hydantoin gave higher limiting current density than 5, 5-dimethylhydantoin when used as a silver complex. If the plating solution used hydantoin alone, the solution precipitated easily.<br>Mixing 1-methylhydantoin with hydantoin prevented precipitation.<br>Soluble silver anode can also be applied to this bath.
- Jitsumu Hyomen Gijutsu
Jitsumu Hyomen Gijutsu 50(1), 68-71, 1999-01-01
The Surface Finishing Society of Japan