✅3.11 - Finishes Flashcards
Exterior
Suitable for outside/outdoor use
Interior
Suitable for inside/indoor use
Preparation
The process of making the surface of the material ready before applying a finish
Self-finishing
A material that does not require a finish
Smart finish
A coating that is applied to the surface of a material to enhance its performance (e.g. waterproofing or flame retardant spray)
Special finish
A protective coating that is applied to the surface of a material
Surface finish
A coating that is applied to the surface of a material in order to enhance its appearance
Why are finishes important?
Protection:
To protect the material the product is made from
Aesthetics:
To enhance the material/product’s visual appearance so that it is more attractive and looks better
Types of metal finishes (8)
Galvanising / Anodising / Electroplating / Paint / Oil/grease / Polish / Plastic dip coating / Powder coating
Types of wood finishes (8)
Wax polish / French polish / Varnish / Wood stain / Exterior wood stain / Oil (teak, Danish, vegetable, linseed / Paint (oil/water based) / Cellulose sealant
Type of plastic finish
Buffing compound/polish
What finishes can be used for any metal? (5)
- Paint
- Oil/grease
- Polish
- Plastic dip coating
- Powder coating
What metals are galvanising used for? (2)
- Iron
- Steel
What metals are anodising used for? (3)
- Typically aluminium
- Titanium
- Magnesium
What materials are electroplating used for? (2)
Typically:
- Iron
- Steel
How and why is galvanising applied?
How:
Via a chemical process which coats the base material with zinc
Why:
Zinc provides a good rust and corrosion-resistant finish
How and why is anodising applied?
How:
Via electrolysis, using acid and electrical current to build protective layers onto the base material
Why:
To increase resistance to corrosion; also an opportunity to add colour
How and why is electroplating applied?
How:
Chemically, using electricity, to add layers of other metal (typically nickel or chromium) over the top of the base layer
Why:
The additional layer helps to prevent rust and corrosion and the finish can be highly polished
How and why is paint applied (to both metal and wood)?
How:
Spray or brush
Why:
To prevent corrosion or enhance the appearance
How and why is oil/grease applied (to metals)?
How:
Sprayed, rubbed or smeared onto exposed surface areas
Why:
Applied as a protective layer to prevent corrosion
How and why is polish applied?
How:
Machine buffing or by hand using a cloth
Why:
To add shine to the material