Rust And Rust Prevention

Question 1

Rusting only happens when?

Answer 1

When steel or iron come into contact with both oxygen and water!

Question 2

What is the chemical reaction that takes place ?

Answer 2

Oxidation

Question 3

What is the result when water becomes loosely bonded to the iron (111) oxide?

Answer 3

RUST!
Or; hydrated iron(111) oxide
(It’s the same thing!)

Question 4

What is the word equation for this reaction?

Answer 4

Iron + oxygen + water = hydrated iron (111) oxide

(= aka. Rust)

Question 5

What are the two main ways to prevent rusting?

Answer 5

Barrier method

Sacrificial method

Question 6

What are the barrier methods?

Answer 6

Painting/ coating with plastic- ideal for big and small structures

Oiling/greasing- this is used when moving parts are involved, such as: bike chains

Question 7

What are the sacrificial methods?

Answer 7

Coating zinc onto an object- this is known as galvanising

Or big blocks of zinc can begotten to iron- this is used on ships’ hulls or on underground iron pipes

Question 8

Name two metals that rust,

Answer 8

Iron and steel