Advantages of corrosion at least 5
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With some metals, like aluminum, surface corrosion forms an oxide layer
which protects the metal from being consumed by corrosion. This is the
principle behind "anodizing" steel to guard against rust.
Some metals, like zinc, attract corrosion due to their (di-) electrical properties. That's why many metal structures (steel/copper) which are exposed to salt water (spray) include sacrificial zinc "anodes" (basically a block of zinc screwed to the structure) to divert the corrosion away from the main structure.
Some metals, like zinc, attract corrosion due to their (di-) electrical properties. That's why many metal structures (steel/copper) which are exposed to salt water (spray) include sacrificial zinc "anodes" (basically a block of zinc screwed to the structure) to divert the corrosion away from the main structure.
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Advantages of corrosion.
[1] Surface corrosion forms an oxide layer which further protects the inner metal form corrosion.
[2] Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.
[3] The principle on which primary batteries work.
In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.
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