Corrosion of Metals

The video discusses the corrosion of different metals when exposed to the environment over time. It explains why gold remains in the best condition, while iron corrodes the most due to its reactivity. The concept of corrosion is defined, highlighting the formation of oxides. The video further explores why aluminum, despite being reactive, forms a protective oxide layer that prevents further corrosion. It introduces galvanizing as a method to protect iron by coating it with zinc, which forms a protective layer. Other methods like painting or using less reactive metals are also mentioned.

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