Corrosion/rust

Question 1

Redox meaning and name a metal this happens to

Answer 1

When oxidation(loss of electrons) and reduction(gain of electrons) happen simultaneously 
iron

Question 2

Why does iron rust?

Answer 2

iron is in contact with BOTH water and oxygen

Question 3

Name 3 different ways of preventing rust

Answer 3

creating a barrier (keep out water ,oxygen)
(painting-colourful as well)
Oiling/Greasing for moving parts -bicycle chain

Sacrificial protection -involves placing a more reactive metal with iron ,the water reacts with the sacrificial metal instead of with the object protecting

Question 4

Galvanising meaning

Name one object that is galvanisied

Answer 4

example of (sp)zinc put on to an iron object to prevent rusting .More reactive than iron  so lose electrons and corrode in preference to iron.
Steel buckets

Question 5

What is electroplating?

Answer 5

coating the surface of a metal with another metal using electrolysis

Question 6

Explain Cathode and Anode and Electrolyte.

Answer 6

Cathode-object going to be electroplate
Anode-bar of metal your using to for plating
Electrolyte-solution containing metal ions