Alloying: add metal which form stable non-porous oxide layer that adhere firmly on iron surface, Tin plating: tin layer covering the iron. tin is less reactive and not corroded easily. tin is non toxic compared to zinc metal., protective coating: prevent exposure of iron to air and water, protective coating: suitable for moving part of machine that encounter friction, cathodic protection: reactive metals oxidized readily and become the anode. iron will not be oxidized because it gets to become the cathode. .

Rusting prevention methods

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