Determination of Free Cyanides concentration in bronze and alkaline copper baths

Cyanide analysis in electroplating baths is essential to ensure the quality of the deposition process, operator safety and environmental control. Cyanide baths, such as those for alkaline coppering and bronzing, allow uniform deposition through 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 a subsequent nickel plating. Monitoring cyanide concentration is crucial: inadequate levels can compromise adhesion and deposit quality, while excesses increase the risks of toxicity and treatment costs.