text: Electrometallurgy is the field concerned with the processes of metal electrodeposition.  There are seven categories of these processes:
  *Electrolysis
  *Electrowinning, the extraction of metal from ores
  *Electrorefining, the purification of metals.  Metal powder production by electrodeposition is included in this category, or sometimes electrowinning, or a separate category depending on application.
  *Electroplating, the deposition of a layer of one metal on another
  *Electroforming, the manufacture of, usually thin, metal parts through electroplating
  *Electropolishing, the removal of material from a metallic workpiece
  *Etching, industrially known to Wikipedia as chemical milling