Rust 🍂 Flashcards
1
Q
What is rust
A
Rust is a chemical reaction between iron , water And oxygen to form the compounds iron (iii) oxide
2
Q
What type of process is rusting
A
It is a redox process
3
Q
Why does the rusting process occur faster in salty water
A
Because the presence of sodium chloride increases the electrical conductivity of the water
4
Q
What is the rusting equation
A
Iron + water + oxygen —> hydrogen iron (iii) oxide
5
Q
What are the rusting prevention methods
A
- Using the reactivity series
- Coating iron with barriers that prevent the iron from coming into contact with oxygen + water
- greasing and oiling
- galvanizing
- sacrificial protection
6
Q
What is Galvanizing
A
This is the process of coating iron with a more reactive metal ( zinc )
7
Q
Sacrificial protection meaning
A
Attaching more blocks of more reactive metals To iron
