| 摘要 |
<p>A cyanide-free electrolyte for the electrodeposition of silver contains, in aqueous solution, a silver compound, a thiosulphate, and at least one additive selected from the group consisting of organic nitrogen compounds having at least two nitrogen atoms per molecule and a molecular weight of 300 or more, and sulphur and selenium compounds containing sulphur or selenium in the -1 or -2 oxidation state. The silver compound can be silver sulphate or carbonate, the thiosulphate can be sodium thiosulphate and the additive can be polyethylene imine or polypropylene imine.</p> |
