What does electroplating mean?
Electroplating is the process of coating an object with a thin layer of metal by passing an electric current through a chemical solution. In practice, the item to be plated is submerged in an electrolyte bath containing dissolved metal salts and connected to a power supply as a cathode; metal ions from the solution migrate to the object and build up as a solid metallic film. The technique, first developed in the early nineteenth century shortly after Volta's invention of the battery, is used both decoratively — to give jewellery, cutlery and car trim the lustre of gold, silver or chrome — and functionally, to protect metals against corrosion and wear. Because only a very thin layer of often expensive metal is needed, electroplating delivers an attractive, durable surface at a fraction of the cost of solid metal. It remains central to industries from electronics and aerospace to fashion accessories.
nounThe process of depositing a thin layer of metal, such as gold, silver, chromium or nickel, onto the surface of another object by means of an electric current passed through an electrolyte solution.
- The industrial and decorative process of coating an object with a layer of metal by electrodeposition.
"The jeweller used electroplating to coat the copper pendant with a fine layer of silver."
"Vintage car restorers rely on electroplating to give bumpers and trim their mirror-bright chrome finish."
"Because electroplating uses only a microscopically thin layer of precious metal, it keeps costs down while preserving the look of solid gold."
Rarely used; the noun is almost always uncountable. A plural appears only when referring to distinct instances or types of the process.
"Different electroplatings require different bath chemistries and current densities."
In the 1840s, the discovery of electroplating was so transformative that counterfeiters could suddenly make base-metal trinkets look like solid silver — and the British government had to rewrite its hallmarking laws in response.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of electroplating
The word combines 'electro-', from Greek 'ēlektron' (amber), the root that gave English 'electricity' after experiments showing amber attracts light objects when rubbed, with 'plating', from Old French 'plate' meaning a flat sheet of metal. Electroplating as a process arose in the early 1800s, following Luigi Galvani's and Alessandro Volta's work on electricity; British inventors John Wright along with George and Henry Elkington patented practical electroplating methods in 1840. Related coinages from the same roots include 'electrolysis', 'electrode', and 'galvanize', the latter honouring Galvani.
Related word forms
How electroplating is actually used
Electroplating is a mass noun with no plural in ordinary usage; it is neutral in register, appearing equally in technical writing, manufacturing contexts, and everyday consumer language. The related verb is 'to electroplate' (e.g. 'the parts were electroplated').
Easily confused with electroplating
Electrolysis is the broader process of using electric current to drive a chemical reaction and break down a substance, while electroplating is a specific application of electrolysis that deposits one metal onto another surface.
Anodizing thickens and toughens the natural oxide layer on a metal (usually aluminium) rather than depositing a new metal layer as electroplating does.