Pickling metal surfaces

In pickling, oxide layers are released from the metal surface in an etching process with acid-containing solutions. In electrolytic pickling, this procedure is supported by galvanic processes.

Pickling is used on steel to gently remove scale and improve the adhesive surface for subsequent coatings or adhesive bonds. Brass surfaces are also pickled to produce a matte surface and, in combination with a dye solution, for blue pickling. Pickling is used for the preparatory activation of plated surfaces.

G.W.P. pickles metal surfaces in a dipping procedure.

Advantages and use

  • Steel, high-grade steel, brass
  • Improved adhesion
  • To produce a matte surface and reduce reflection
  • For chemical coloring
  • Used in machine construction, the optical industry, etc.


Additional types of surface finishing