These organic or inorganic compounds are added to electrolytic plating solutions to alter the crystallization of the deposited metal. They work by adsorbing onto the highest points of the microscopic surface, forcing the metal ions to deposit in the microscopic valleys. This leveling action prevents a dull or matte finish, creating a dense, shiny layer that resists tarnishing and early corrosion.
Check the bath chemistry before we run the next batch of hardware, because the last run looked dull and probably needs more brightener.
Related terms
Anode
Electrode where oxidation happens and metal dissolves; in CP, the hardware installed to discharge current.
Cathode
Electrode where reduction happens and current is collected, so the metal there does not corrode.
Electrochemical
Relating to chemical reactions that involve the transfer of electrons, driven by or producing an electric current.