How does the anodising of aluminium protect it from corrosion? - Leaving Cert Chemistry - Question B - 2004
Question B
How does the anodising of aluminium protect it from corrosion?
Worked Solution & Example Answer:How does the anodising of aluminium protect it from corrosion? - Leaving Cert Chemistry - Question B - 2004
Step 1
Thickens (thick) protective layer
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Answer
Anodising aluminum involves the electrochemical process that forms a thick layer of aluminum oxide on the surface. This oxide layer acts as a protective barrier that prevents moisture and other corrosive elements from reaching the underlying metal.
Step 2
Of oxide on surface
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Answer
The aluminum oxide created during the anodising process is much harder and more durable than natural oxide layers. This increased thickness and density means the anodised surface is more resistant to scratches and degradation, ensuring long-term protection from corrosion.
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