Determination of Free Cyanides concentration in Bronze, Silver and Alkaline Copper baths

The analysis of cyanides in electroplating baths is essential to ensure the quality of the deposition process, operator safety and environmental control. Cyanide baths, such as those used for alkaline copper plating, bronze plating and silver plating, allow for uniform deposition thanks to the formation of stable complexes with metal ions. Copper plating, in particular, is used both to protect against atmospheric corrosion and to improve the adhesion and protective effectiveness of subsequent nickel plating. In cyanide silver plating baths, cyanides form soluble complexes that are essential for depositing uniform, adhesive layers on electrical components and high-quality manufactured goods, ensuring excellent corrosion resistance, preservation of conductivity and long-term reliability against oxidation.

Monitoring cyanide concentration is crucial: inadequate levels can compromise adhesion and deposit quality, while excesses increase the risks of toxicity and treatment costs.