| 摘要 |
<p>The invention relates to an electrolyte for hard silver-plating of electric contacts, containing 30 ...40 g/l metallic silver, 120 ... 135g/l KCN, 100g/lKCO3, 5 ...10 ml/l hardening agent, and 0 ... 60ml/l product intensifying the hardening agent activity. Said hardening agent comprises 187 g triethanolamine, 7.5 antimony trioxide, 21 g potassium hydroxide and 30 g Seignette's salt, completely dissolved in a volume of 250 ml of aqueous solution and the product intensifying the hardening agent activity contains 28 % (vol.) of a compound having the formula Cl-CH2-CH2-Cl and 72 % (vol.) of a compound having the formula HO-CH2-CH2-NH-CH2-CH2-NH2.</p> |
