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Created page with "==Key Stage 4== ===Meaning=== A '''sacrificial anode''' is a reactive metal attached to a less reactive metal to prevent th..."
==Key Stage 4==
===Meaning===
A '''sacrificial anode''' is a [[Reactivity Series|reactive]] [[metal]] attached to a less [[Reactivity Series|reactive]] [[metal]] to prevent the less [[Reactivity Series|reactive]] [[metal]] from [[Corrosion|corroding]].
===About Sacrificial Anodes===
: [[Corrosion]] of a [[metal]] [[object]] can also be prevented using a [[Sacrificial Anode]] which is a [[metal]] more [[Reactivity Series|reactive]] [[metal]] placed in [[Electrical Contact|electrical contact]] with the [[object]].
: A [[Sacrificial Anode]] prevents [[corrosion]] of a [[metal]] because the more [[Reactivity Series|reactive]] [[metal]] has a greater tendency to form [[Positive Ion|positive ions]] causing it to [[Oxidation|oxidise]] first.
: [[Zinc]] is commonly used to prevent [[Iron]] from [[rusting]] because [[Zinc]] is a stronger [[Reduction|reducing agent]] than [[Iron]].
{| class="wikitable"
|-
|[[File:SacrificialAnode.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |A [[Sacrifical Anode]] made of [[Zinc]] has been attached to the [[Iron]] hull of a boat.
|}
===Meaning===
A '''sacrificial anode''' is a [[Reactivity Series|reactive]] [[metal]] attached to a less [[Reactivity Series|reactive]] [[metal]] to prevent the less [[Reactivity Series|reactive]] [[metal]] from [[Corrosion|corroding]].
===About Sacrificial Anodes===
: [[Corrosion]] of a [[metal]] [[object]] can also be prevented using a [[Sacrificial Anode]] which is a [[metal]] more [[Reactivity Series|reactive]] [[metal]] placed in [[Electrical Contact|electrical contact]] with the [[object]].
: A [[Sacrificial Anode]] prevents [[corrosion]] of a [[metal]] because the more [[Reactivity Series|reactive]] [[metal]] has a greater tendency to form [[Positive Ion|positive ions]] causing it to [[Oxidation|oxidise]] first.
: [[Zinc]] is commonly used to prevent [[Iron]] from [[rusting]] because [[Zinc]] is a stronger [[Reduction|reducing agent]] than [[Iron]].
{| class="wikitable"
|-
|[[File:SacrificialAnode.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |A [[Sacrifical Anode]] made of [[Zinc]] has been attached to the [[Iron]] hull of a boat.
|}