Cyanogen-free silver-plating brightener and method for preparing the same

Abstract

The preparation method for cyan-free silver plating lustre-coating agent comprises: adding 0.1-1mol / L heliotropin into saturated 0.1-2mol / L NaHSO3 solution for ultrasonic oscillating; dissolving 0.1-2mol / L triethanolamine and 0.1-1mol / L butynediol into the solution, adding solvent to dilute to 1L. This invention overcomes the defects in prior art withnot sulfur-containing compound, and has well dispersion.

Description

technical field

[0001] The invention belongs to the technical field of electrodeposition, and relates to a brightener for cyanide-free silver plating and a preparation process thereof, in particular to a brightener and a brightener used in a cyanide-free silver plating process with hydantoin-silver nitrate as the main component. Preparation Process. Background technique

[0002] Silver is a malleable and malleable precious metal. Like gold, it is widely used in the decoration industry due to its low content in the earth's crust and its bright appearance. Decorative electroplating silver requires high bonding strength between the coating and the substrate, strong wear resistance, corrosion resistance and discoloration resistance, and a bright and delicate appearance. Alkaline cyanide bright electroplating silver plating system was the most widely used and researched bright silver plating system in the past, but with the enhancement of people's environmental protection awaren...