Material Modification & Surface treatments Flashcards

1
Q

What is wood seasoning?

A

The drying of wood to reduce the risk of warping

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2
Q

What are UV stabilisers?

A

Powder that is added to plastic to reduce discolouration from the sun.

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3
Q

What are fillers?

A

Make up plastic without having to use more material (reduces cost)

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4
Q

What is plasticising?

A

Can be added to plastic to make them easier to form.

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5
Q

What is annealing?

A

The slow heating of a metal to make it more malleable and softer to work with

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6
Q

What is hardening?

A

Metal is heated and then quickly quenched into oil or water. This makes its harder but more brittle.

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7
Q

What is tempering?

A

The metal is heated and allowed to dry freely in the air so as to allow more softness and make it less brittle. Often used alongside hardening.

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8
Q

what are the most common finishes for wood?

A

Oils/wax - applied with brush to keep out moisture
French Polish - applied with cotton wool
Wood stain - Stain wood other colour
Yacht varnish - waterproofing

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9
Q

What are the finishes for metal?

A

painting
dip coating
galvanising
electro plating

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10
Q

what is dip coating?

A

dipping metal into fluidised power to change colour and protect against corrosion.

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11
Q

What is painting (metal)

A

A cheap way of changing a metals colour. A primer will be required.

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12
Q

What is galvanising?

A

Dipping steel into a bath of liquid zinc to protect against corrosion.

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13
Q

What is electroplating?

A

Coats with thin layer of metal using electricity. Most commonly- zinc, nickel or tin (corrosion resistance).

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