Surface treatments and finishes (AQA GCSE Design and Technology): Flashcards
📚Flashcards
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Practise the cards
15 cards from this deck
Two main purposes of surface treatments on metals
Two main purposes of surface treatments on metals
Protecting metal from corrosion & improving appearance
Material used in dip coating
Material used in dip coating
Thick polymer materials (e.g., PVC)
How dip coating prevents corrosion
How dip coating prevents corrosion
Blocks air & moisture from metal surface
Temperature metal is heated to for dip coating
Temperature metal is heated to for dip coating
230°C
Common uses of dip coating
Common uses of dip coating
Tool handles & fridge shelves
Metal used to coat steel in galvanising
Metal used to coat steel in galvanising
Zinc
Why zinc protects steel in galvanising
Why zinc protects steel in galvanising
Zinc oxidises faster than steel (sacrificial protection)
Lifespan of galvanised steel products
Lifespan of galvanised steel products
50 to 100 years
Finish quality of powder coating vs traditional paint
Finish quality of powder coating vs traditional paint
Much harder, more durable & smooth high-gloss finish
Surface preparation method for powder coating
Surface preparation method for powder coating
Sandblasting
Principle used in powder coating application
Principle used in powder coating application
Electrostatic (metal negative, powder positive)
How powder coating is cured after application
How powder coating is cured after application
Heat melts powder particles together in oven
Type of finish provided by metal lacquer
Type of finish provided by metal lacquer
Clear protective finish
Process used in electroplating & anodising
Process used in electroplating & anodising
Electrolysis (electrical process)
Finish created by hot blacking process
Finish created by hot blacking process
Thin dark black iron oxide finish