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Learning Intentions
Learning Intentions
To learn about corrosion
To learn the different types of corrosion reactions
Success Criteria
Success Criteria
I can define corrosion
I can state the different types of corrosion reactions
Engage
Engage
Name something that each of these metals have in common.
New Information
New Information
Corrosion Reactions
Corrosion Reactions
"corrodere" - means gnaw away (Latin)
Corrosion reactions are chemical changes of metals in the presence of an oxidising chemical (commonly water or oxygen)
Types of corrosion
Types of corrosion
Unlike combustion corrosion is not seperated by the outputs of reaction but rather the different metals.
We are going to be investigating 3 main metals:
Iron Corrosion
Aluminium Corrosion
Copper Corrosion
Iron Corrosion
Iron Corrosion
This is most commonly known as rusting.
Pure iron will react with oxygen to make iron oxide
4Fe + 3O2 -> 2Fe2O3
Aluminium Corrosion
Aluminium Corrosion
Pure aluminum will react with oxygen to make aluminium oxide
4Al + 3O2 -> 2Al2O3
Copper Corrosion
Copper Corrosion
Pure aluminum will react with oxygen to make aluminium oxide
4Cu + O2+2H2O -> 2Cu(OH)2
Why is it useful to know about corrosion?
Why is it useful to know about corrosion?
If we understand how corrosion works we can understand how to prevent it.
You may notice in each of the reactions we have gone through that oxygen or water is present for each of them. We can duduce that removing/limiting water can reduce corrosion.
We can do this by:
Putting a layer between the water/oxygen and the metal (paint)
By placing a sacrifical anode
Reflection
Reflection
Written Reflection
Written Reflection
What did you struggle with?
What was really easy?
What are you still curious about?
Success Criteria
Success Criteria
Which level are you currently sitting at in the success criteria?
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