Non Ferrous Metals & Alloys Flashcards
1
Q
Advantages of Aluminium
A
- relatively inexpensive
- corrosion resistant
- easily coloured by anodization
- conducts electricity
- when polished, highly reflective
ductile & malleable - impermeable
- odourless
- not magnetic
- good strength to weight ratio
- easy recycled
- lightweight
- abundant - readily available in different stock forms
- easy to work, casts well, low(ish) melting point
2
Q
Disadvantages of Aluminium
A
- difficult to weld
- painting processes do not bond well - specialised paints must be used/ must be anodized - added expenses
- not INCREDIBLY strong
- not hard (scratches easily)
- can crack under stress
3
Q
Advantages of Duralumin
A
- lightweight
- very strong
- malleable
- ductile
- tough
- high resistance to stress and cracking
4
Q
Disadvantages of Duralumin
A
- copper alloy - NOT corrosion resistant
- strength can be easily lost during welding
5
Q
Advantages of Zinc
A
- easily worked
- corrosion resistant
- improves casting in alloys (more fluid and reduces MP) - makes casting CHEAPER
- casts well
6
Q
Disadvantages of Zinc
A
Brittle
7
Q
Advantages of Brass
A
- corrosion resistant
- harder than copper
- malleable
- ductile
- good conductor of heat & electricity
8
Q
Disadvantages of Brass
A
- scratches easily
9
Q
Advantages of Silver
A
- malleable
- ductile
- conducts heat & electricity
- when polished, highly reflective
- anti bacterial
- dense - heavy for its volume - difficult to counterfeit
10
Q
Disadvantages of Silver
A
- dense
- soft & scratches easily
- often alloyed with copper
- EXPENSIVE
11
Q
Advantages of Bronze
A
- harder & tougher than brass
- corrosion resistant
- casts well
- malleable
12
Q
Disadvantages of Bronze
A
- very soft
- scratches easily
13
Q
Advantages of Copper
A
- good conductor of electricity
- malleable & ductile
- will eventually corrode
- tough - not easy to break by impact force
14
Q
Disadvantages of Copper
A
- poor tensile strength
- expensive compared to other metals
- scratches easily
15
Q
Advantages of Pewter
A
- malleable
- easily fusible with other metals
- non corrosive
- resists tarnishing
- considered non toxic in food manufacture