why are copper and aluminium resistant to atmospherie corrosion whereas iron is not
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as iron reacts with air and moisture to get rusted ( ferric oxide)
this rust damages the metal and is unbeneficial when it get rusted the rusted layer falls off leading to another layer to get exposed to air
BUT
al and Cu also get corroded but it is beneficial to them when they get corroded they a sticky layer forms which sticks to the metal and does not make the metal more exposed to the air...
this rust damages the metal and is unbeneficial when it get rusted the rusted layer falls off leading to another layer to get exposed to air
BUT
al and Cu also get corroded but it is beneficial to them when they get corroded they a sticky layer forms which sticks to the metal and does not make the metal more exposed to the air...
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