Attività

Plating

There s no such thing as alchemy—magically changing common chemical elements into rare and valuable ones—but water plating is possibly the next best

thing. The idea is to use electricity to coat a relatively mundane metal, such as copper, with a thin layer of another, more precious metal, such as gold or

silver. Water plating has lots of other uses, besides making cheap metals look expensive. We can use it to make things rust-resistant, for example, to

produce a variety of useful alloys like brass and bronze, and even to make plastic look like metal. How does this amazing process work? Let s take a closer

look!

Plastic water plating involves passing an electric current through a

solution called an electrolyte. This is done by dipping two terminals called electrodes into the electrolyte and connecting them into a circuit with a

battery or other power supply. The electrodes and electrolyte are made from carefully chosen elements or compounds. When the electricity flows through the

circuit they make, the electrolyte splits up and some of the metal atoms it contains are deposited in a thin layer on top of one of the electrodes—it

becomes electroplated. All kinds of metals can be plated in this way, including gold, silver, tin, zinc, copper, cadmium, chromium, nickel, platinum, and

lead.

Water plating is very similar to electrolysis (using electricity to split up a chemical solution), which is the reverse of the process by which batteries

produce electric currents.