Difference between revisions of "Corrosion"
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==Key Stage 3== | ==Key Stage 3== | ||
===Meaning=== | ===Meaning=== | ||
| + | [[File:RustingGears.png|right|300px|thumb|[[Rusting]] is a form of [[corrosion]].]] | ||
[[Corrosion]] is when a [[material]] is worn down by [[Chemical Reaction|chemical reaction]]s with [[substance]]s in the environment. | [[Corrosion]] is when a [[material]] is worn down by [[Chemical Reaction|chemical reaction]]s with [[substance]]s in the environment. | ||
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===About Corrosion=== | ===About Corrosion=== | ||
: [[Corrosion]] is commonly caused by [[Water]], [[Oxygen]] and [[Acid]]s in the environment. | : [[Corrosion]] is commonly caused by [[Water]], [[Oxygen]] and [[Acid]]s in the environment. | ||
| − | : | + | : [[Metal]]s and [[stone]] (such as [[limestone]], [[marble]] and [[chalk]]) are the most commonly '''corroded''' [[material]]s. |
| + | : More [[Reactivity Series|reactive]] [[metal]]s are more easily '''corroded'''. | ||
| + | |||
| + | ===Examples=== | ||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:RustingGears.png|center|200px]] | ||
| + | |[[File:CorrosionCopper.png|center|200px]] | ||
| + | |[[File:CorrosionStatue.png|center|200px]] | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |The [[corrosion]] of [[Iron]] forms brown [[Iron Oxide]], known as [[Rusting|rust]]. | ||
| + | | style="height:20px; width:200px; text-align:center;" |The [[corrosion]] of [[Copper]] forms green [[Copper Carbonate]]. | ||
| + | | style="height:20px; width:200px; text-align:center;" |This statue is made of [[Limestone]] which is mostly [[Calcium Carbonate]]. It is '''corroded''' by [[Acid Rain]] to form [[soluble]] [[salt]]s which wash away. | ||
| + | |} | ||
| + | |||
===Preventing and Reducing Corrosion=== | ===Preventing and Reducing Corrosion=== | ||
Revision as of 16:45, 26 January 2019
Contents
Key Stage 3
Meaning
Corrosion is when a material is worn down by chemical reactions with substances in the environment.
About Corrosion
- Rusting is a form of corrosion.
- Acid rain causes the corrosion of limestone and marble buildings and statues.
Key Stage 4
Meaning
Corrosion is when a material is worn down by chemical reactions with substances in the environment.
About Corrosion
- Corrosion is commonly caused by Water, Oxygen and Acids in the environment.
- Metals and stone (such as limestone, marble and chalk) are the most commonly corroded materials.
- More reactive metals are more easily corroded.
Examples
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| The corrosion of Iron forms brown Iron Oxide, known as rust. | The corrosion of Copper forms green Copper Carbonate. | This statue is made of Limestone which is mostly Calcium Carbonate. It is corroded by Acid Rain to form soluble salts which wash away. |