The invention discloses a
thiosulfate silvering additive, a preparation method thereof and electroplate liquid containing the same. The
thiosulfate silvering additive comprises 12-18 g / L of lauryl
sodium sulfate, 3-5 g / L of
polyethylene glycol, 10-13 g / L of
nitrogen mustard, 5-10 g / L of cumin, 250-350 g / L of 1,10-
phenanthroline monohydrate, 50-100 g / L of
dimercaprol dimercaptopropanol, 50-100 g / Lof mercaptoethylamine, 100-150 g / L of
ethylene glycol tetraacetic acid (EGTA) and the
balance water. The additive provided by the invention enables the
dispersity, the stability and the electroplatingperformance of the electroplate liquid to be quite remarkably improved, the pH value does not need to be adjusted repeatedly in the
electroplating process, meanwhile, the performance including the smoothness, the
adhesive force, the glossiness, the anti-tarish performance and the like of a
silvering coating are remarkably improved, the thickness of the
coating is further reduced, and phenomena such as fracturing do not exist; and the electroplate liquid provided by the invention does not contain
cyanide, the mirror surface of the
coating is bright, small in
brittleness, good in
adhesive force, flat in surface, bright, good in anti-tarish performance and high in
heat resistance, application to the multiple fields of decorative
electroplating, functional
electroplating and the like can be achieved, preplating is not needed, and the bonding force can also be guaranteed.