Processing Flashcards
6 types of surface finish for metal
Plastic dip coating Coating in oil or grease Painting Blue and oil Galvanising Anodising
What is plastic dip coating
Heated till straw colour Dipped into polythene powder Air pumped into tank Fluidising tank Allowed to cool then trimmed
What is metal painting (6)
Aesthetic and functional Most common Key (roughen) smooth surface Degrease using solvent Apply primer Apply finishing coats and sand between coats
What is blue and oil (4)
Heat treatment
Heat steel till blue
Dunk in oil
Makes steel harder
What is galvanising (5)
Used for steel Water tank and metal frame Electroplating puts a layer of zinc on Functional Dull silver luster
What is anodising (4)
Used for non-ferrous
Electrical processes used
Increases thickness with oxidation
Thicker oxide layer created can be any colour
6 types of surface finish for woods
Painting Pressure treated Oiled Wood stain Sanding sealer
What is wood painting (4)
Aesthetic and functional
Can be done by consumer or manufactured
Stops wood rotting
Acrylic paint used
What does pressure treating do
Stops rotting for a short while
What do varnish and laquers do to wood
Hardens surface
What does oiling do
Adding teak oil stops rotting
What is sanding sealer (2)
Cellulose based
Seals surface
2 types of surface finish for plastics
Self finished
Polishing
When is self finished plastic used
Imported by the mould
What is polishing
Wet and dry
