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product design > finishers for metals > Flashcards

finishers for metals Flashcards

1
Q

what type of finishes for metals are there electroplating

A

polymer dip coating
galvanising
poeder coating
anodising

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2
Q

what is electroplating

A

coat one metal with a different type of metal

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3
Q

what is the benefit of electroplating

A

improve aesthetic

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4
Q

what is the common base metal of electroplating

A

can be copper, silver and other metals

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5
Q

what is the common coat metal for electroplating

A

chromium
silver
gold

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6
Q

what is steel commonly plated with

A

tin
nickel
chronium
cadmium

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7
Q

why do we plated steel

A

improve corrision wear resistent

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8
Q

what can polymer dip coating be

A

liquid / powder form

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9
Q

what form is the plastic in polymer dip coating

A

liquid form of pvc known as plastisol

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10
Q

what happens to be the metal parts in polymer dip coating

A

pre-heated before being dipped

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11
Q

what happens when powder is used in polymer dip coating

A

it is in a fluidised tank
air is blown into the bottom of the tank which makes the powedered plastic appear to bubble

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12
Q

what is the process of galvanising q

A

steel is immersed into a molten bath of zinc
this creates a metalkirgical bond between the zinc and the steel making a verry effectve…..

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13
Q

what metal is used in galvanising

A

steel

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14
Q

what liquid is used in galvalising

A

zinc

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15
Q

what does powder coating involve

A

involves the use of electrostatic charge

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16
Q

what happens in powder coating

A

the powder is positively charged. the object to be coated in negatively charged
the charge is sprayed onto the surface. the electrostatic charge means that it sticks evenly
it is then put into an oven, where the coating melts and forms a smooth, hardwearing surface

17
Q

what does anodising use

A

electrolysis

18
Q

what is anodising used on

A

aluminium and titanium - not steel

19
Q

what does the process create in anodising

A

creates an oxide layer that makes the surface smooth and protects from corrosion

20
Q

how does anodising work

A

the product is placed in a solution of sulphuric acid, sodium sulpate and water
the oxide layer is also to accept dyes of a variety of colours

product design (6 decks)

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