electroplatingelectroplating

Electroplating is the process in which a metallic object is coated with another metal by electrolysisElectroplating is the process in which a metallic object is coated with another metal by electrolysis

electroplating with copperelectroplating with copper electroplating an object with copper: electroplating an object with copper:

- +

object (cathode)

copper (anode)

CuSO4

electroplatingelectroplating

at the cathode, Cu2+ ions are discharged as copper metal and deposited on the object

electroplating with copperelectroplating with copper

Cu(s) Cu2+(aq) + 2e

the electrolyte is CuSO4 solution

object is made the cathode; copper is made the anode

at the anode, copper dissolves

Cu2+(aq) + 2e Cu(s)

transfer of copper from anode to the cathode; CuSO4 solution remains unchanged

many metallic objects can be electroplated in the same way:

electroplatingelectroplating

electroplatingelectroplating

o object is made of cathodeo metal used for electroplating is made the anodeo electrolyte is a solution of ions of the metal

o object is made of cathodeo metal used for electroplating is made the anodeo electrolyte is a solution of ions of the metal

electroplatingelectroplating

examples of electroplating:

electroplatingelectroplating

Electroplating MetalElectroplating Metal UsesUses

chromium water taps, motorcar, and bicycle parts

tin tin cans

silversilver-plated sports trophies, plaques,

ornaments, knives and forks

nickelcorrosion-resistant layer before

electroplating with another metal on top