why are steel and brow calle alloys
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Many steel applications require increased corrosion resistance. To achieve this result, aluminum, silicon, and chromium are alloyed. They form a protective oxide layer on the surface of the steel, thereby protecting the metal from further deterioration in certain environments.
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Explanation:
steel is composed of primarily iron and some elements like carbon,manganese, sulphur,oxygen etc.
bronze is composed of primarily copper and tin and some elements like zinc,manganese etc...
They are composed of different elements so they are called alloys
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