How will you electroplate rupees 5 coin with silver or nickel?
Answers
Electroplating. A U.S. penny is made of zinc with a 20 microns thick layer of copper on its surface. When we make the coin, its manufacturing process must be controlled. ... Electroplating is a common manufacturing method that involves applying a thin layer of metal onto another
Place 1/2 cup silver nitrate powder into a medium size glass bowl. Pour in 1 qt. distilled water and mix with a spoon until the powder has dissolved. In a separate bowl, mix 1/2 cup potassium cyanide with 1 qt. distilled water. When complete, mix both liquid solutions in a large glass basin.
Place a battery next to the basin containing the electrolytic solution. A 9-volt battery is sufficient for most silver plating jobs, although a 12-volt battery is also suitable.
Connect a wire to the positive terminal of the battery. The terminal is commonly red and identified with a plus sign. Connect an alligator clip to the other end of the wire and clip it onto a piece of silver, which will serve as the source metal for the plating process. The silver, attached to the battery, is known as an anode. Slowly lower the anode into the electrolytic solution.
Connect a wire to the negative terminal on the battery. The negative terminal is typically black and identified with a minus sign. Attach an alligator clip to the opposite end of the wire and clip it onto the item you wish to plate with silver. This is known as a cathode. Slowly lower the cathode into the electrolytic solution.
Wait for the item to be plated by the silver. The length of time will depend on the size of the item being plated and the strength of the battery you are using. The process can take anywhere from days to weeks, depending on these variables. Check the cathode each day to see if the entire surface has been plated. If the rate of plating seems too slow, replace the battery with a new one.