Surface Treatment and Coating

PGF 2019
Taschenbuch der GIESSEREI PRAXIS
Manufacturing Processes

Surface treatment includes measures to improve the surface appearance, protect the surface or change the physical or functional characteristics of the work piece surface:

  1. Mechanical processing such as cleaning and scouring, fettling of castings (deburring, brushing, grinding, grit blasting) or smoothing (grinding and polishing).
  2. Thermal and electrochemical processes through application and coating with paints and lacquers, the spraying or vapour phase deposition of metals, enamelling, annealing in metal powders or metal compounds, dipping in molten metals, oxidising and galvanising, chemical vapour deposition, build-up welding and surfacing by soldering.
  3. Surface hardening by means of flame hardening, induction hardening, case hardening or nitriding.
  4. Chemical processes such as pickling, burnishing and etching.

Surface coating means the application of layers:

Metallic layers by means of:
Galvanising, plating, hot dip coating, cold gas, plasma, arc and flame spraying, aluminising (alitising and calorising), chromatising, sheradising, build-up welding and surfacing by soldering.

Non-metallic, inorganic layers by means of:
Enamelling, passivating, anodic oxidation (anodising). Application of wear protection layers using thin-film technology: Chemical vapour deposition (CVD), physical vapour deposition (PVD)


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