Difference between revisions of "Sacrificial Anode"
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: [[Zinc]] is commonly used to prevent [[Iron]] from [[rusting]] because [[Zinc]] is a stronger [[Reduction|reducing agent]] than [[Iron]]. | : [[Zinc]] is commonly used to prevent [[Iron]] from [[rusting]] because [[Zinc]] is a stronger [[Reduction|reducing agent]] than [[Iron]]. | ||
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|[[File:SacrificialAnode.png|center|300px]] | |[[File:SacrificialAnode.png|center|300px]] | ||
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| − | | style="height:20px; width:300px; text-align:center;" |A [[ | + | | style="height:20px; width:300px; text-align:center;" |A [[Sacrificial Anode]] made of [[Zinc]] has been attached to the [[Iron]] hull of a boat. |
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Latest revision as of 17:40, 26 January 2019
Key Stage 4
Meaning
A sacrificial anode is a reactive metal attached to a less reactive metal to prevent the less reactive metal from corroding.
About Sacrificial Anodes
- Corrosion of a metal object can also be prevented using a Sacrificial Anode which is a metal more reactive metal placed in electrical contact with the object.
- A Sacrificial Anode prevents corrosion of a metal because the more reactive metal has a greater tendency to form positive ions causing it to oxidise first.
- Zinc is commonly used to prevent Iron from rusting because Zinc is a stronger reducing agent than Iron.
Examples
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| A Sacrificial Anode made of Zinc has been attached to the Iron hull of a boat. |