Finishing Materials

Finishing Materials

Metals• Standard FinishesSpray Paint – Solvent based paints;excellent aesthetic qualities, and corrosion resistance

Powder coating – Coating metal in a plastic “skin” The powder coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a "skin". The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly use for the coating of metal

Finishing MaterialsMetalsPlastic dip coatingDip coating is a plastic manufacturing process where a heated metal mould is immersed in a tank of molten polymer resin such as plastisol. The plastic is coated/formed around the mould. The hotter the mould and the longer the dip, the thicker the coating. The mould is then extracted from the bath and goes through a curing or cooling process.

ElectroplatingThe electroplating process provides a protective coating to different types of metal. The most common use in firearms manufacturing is chrome or nickel plating, which provide a bright finish to the metal. Electroplating can be used on various types of metals; the result is a thin metal coating on the exterior of the original metal part.

Silver electroplating. The anode is asilver bar and the cathode is an iron spoon.

Finishing MaterialsMetalsHeavy Duty/Extreme Conditions Galvanising – Involves dipping metal (usually mild steel) into a bath of molten zinc. Provides high corrosion resistance, although finish is not the most attractive

Galvanised Boat TrailerGalvanising Process

Finishing Materials

Woods

• Interior – Varnish – comes in oil, water and solvent based form - Wood stains - enhances timber colour

• Exterior – Varnish - solvent based, excellent weather protection

Finishing Materials

Plastics

• Plastics do not usually require a finish, but there are exceptions.

• Q. What is this and what does it do?

A. Buffing machine; used for polishing plastic and

metal