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Question

Anodizing is a process in which a layer of metal ____________ forms on the metal surface increasing the corrosion resistance.

A
oxide
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B
carbonate
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C
hydrogen Carbonate
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D
sulphate
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Solution

The correct option is B oxide

1. Anodising is an electrolytic process for producing thick oxide coatings, usually on aluminium and its alloys.

2. The oxide layer is typically 5 to 30µm in thickness and is used to give improved surface resistance to wear and corrosion, or as a decorative layer.


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