Question

For cadium plating, electrolyte used is:

• A. cadmium sulphate and sulphuric acid
• B. cadmium hexa metaphosphate
• C. sodium cyanide, cadmium and caustic soda
• D. all of the above

Answer 1

Answer: (C)

sodium cyanide, cadmium and caustic soda

The cadmium plating electrolyte contains the sodium cyanide and a cadmium salt in the presence of another alkali compound, such as caustic soda or sodium carbonate. Usually the cadmium plating electrolyte has added with the following ratio of the sodium cyanide, cadmium and caustic sod. that is 30 grams of cadmium cyanide, 50 grams of sodium cyanide and 20 grams of caustic soda per liter of electrolyte solution.