6.2 Flashcards
why are surface finishes used
prevent materials absorbign moisture
prevent against decay, corrosion and wear
easier maintenecne
enhance aesthetics
how si timber finished
using glass paper or wire wool to create a smooth surfece
Examples of wood finishes (6)
Acyclic and polyuretha varnish
Water based paints
Wax
Danish oil
Teak oil
Preservatives
What does varnish do to timber (5)
Makes it
hard
tough
heat proof
waterproof
allows grain to be seen in finish
What does water based paints do to timbers (6)
Protection
Colour
Tougher
Harder
Resitantto moister
Aesethetic
What does wax do to timber (4)
High gloss finish
Hardness
Toughness
Clear finish
What does danish oil do to timber
Maintains natural appeatnce, by soaking into the wood and enhanicng grain
is dnaish oil a hard wearing finish
No
WHat does reguar application fo danish oil allow
A matt water resitant finish
WHat does teak oil do to timber
Imporvees weather and fungal resistance
Aesthetics
What is teak oil used on
Natrually oily woods
What does pressure treating do to woods
Weather resiatnce
Restistance to fungal shit
How is metal prepped before finsihing
Degreased and cleaned
What is eelcrtoplating
adding a thin layer user electricity
What is galavnising
coating steel in zinc
Metal finishes (8)
Celluous and acrylic paint
Electroplating
Galvanising
Polymer dip coating
Metal dip coating
Powder coating
Sealents
Adonising
What do paints on emtal do
Protect against corrosion
Textures and grpahics
Coloured finish
What does electroplating and galvanising do to metals
Gives a more hardwear finish with a rptoectiev layer
What does dip coating offer
Provides colour and a barrier against corrosion
Where is polymer dip coating used
Hangers
Dish drainiers
Play frames
Where is metal dip coating used
FOod cans
Beams
gates
Animal pens
Car bodies
What does powder coating offer
corrosion reisatnce
aesthetics
hardwearin finsih
Whrre is pwoder coating used
washing machien bodies
dishawshers
how does pwoder coating work
Thermopolyer resin sprayed with an air gun
The product is baked and heated and hte pwoder metls
What is the charge of the product in powder coating
Neagtive
What do sealants do to mateals
Protect polished surfaces fromd ecay and tarnish
Where are sealents used
Automative industry
What does adonising do to metals
creates a natrual oxide layer
hardness
toughness
colour
Where is adonising used
usually aluminium products
phone cases
harddrive covers
what si adonising
coatign a material with a proetctive oxide layer
