appropriate surface treatments Flashcards
What are metal surface treatments for?
- functional reasons, to improve the performance of the material/product
- aesthetic reasons, to improve the visual appearance of the material/product
What finishes are commonly used on metals?
- powder coating
- galvanising
- enamelling
- oil and wax finishing
- primer/paint
- electroplating
How can surfaces be prepared for finishing metals?
The removal of dust, grease and rust is critical before applying a finish to a metal surface. Some finishes need grip to adhere to some metals, so it is important to key the surface to accept the finish.
What finishes are commonly used on timbers?
- varnishes
- wood stains
- oils
- polishes
- preservative finishes
- paints.
Why are paints used on timbers?
Painting provides a colourful finish but also protects the timber. Glossy, matt or silk paints can be applied with a brush, roller or sprayer.
Why is wood staining used on timbers?
Wood stain is applied to enhance the appearance of the wood. Stains can also provide some protection but normally a coat of varnish is used to seal the stain.
Why are oil and waxes used on timbers?
Oil and wax soak into the timber and can enhance its appearance, whilst repelling moisture and water.
Why are varnishes used on timbers?
Varnish provides a shiny coat, usually applied in layers to make it more durable. Glossy and matt style varnishes are common
Why is dip treating used on timbers?
Dip-treating timber protects the surface of the material, but outdoor timber fences tend to be made from pressure treated timber, which is far more long-lasting.
What are self-finishing polymers?
Some plastics are called self-finishing. This means that once they are formed into their desired shape using a mould, their surface will require no further finishing.
What is the folding process?
To fold a paper, card or board, normally a crease would be applied so that the material bends without breaking, tearing or weakening. Sometimes a perforated line or score is applied so that the material bends or folds in exactly the right place.
