Rusting

Question 1

Rusting costs money because

Answer 1

Need to protect iron and steel objects + replacement of rusted items

Question 2

Iron and steel are used because

Answer 2

Cheaper and stronger

Question 3

What elements need to be present for rusting

Answer 3

Oxygen and water

Question 4

Rusting scientific name

Answer 4

Hydrated iron (|||)oxide

Question 5

Painting

Answer 5

Bridges and iron railings

Question 6

Oiling

Answer 6

Moving machine parts are kept oily

Question 7

Tinning

Answer 7

Tins used for food storage are made of steel and have a thin layer of tin to prevent rusting

Question 8

Galvanising

Answer 8

Articles made of iron or steel are dipped into molten zinc

Question 9

Sacrificial protection using magnesium

Answer 9

He magnesium reacts instead of the iron, protects underwater pipes and oil rigs

Question 10

Iron is a METALLIC element

Answer 10

Malleable, strong, conducts electricity

Question 11

Iron is mined from the ground so it is

Answer 11

Inexpensive material

Question 12

Most iron is turned into steel which is an

Answer 12

Alloy

Question 13

Rust is

Answer 13

The fancy name given to the corrosion of iron and steel

Question 14

Rusting is sped up by the presence of

Answer 14

Acid and salt

Question 15

Stainless steel

Answer 15

Steel with added chromium

Question 16

Why does stainless steel not rust

Answer 16

Chromium forms a protective oxide coating

Question 17

Rusts pigment

Answer 17

Ochre

Question 18

Corrosion

Answer 18

An oxidation reaction that forms a metal oxide