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Does copper or aluminum rust faster?

Updated: 5/24/2024
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Wiki User

12y ago

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Neither rust. Only iron rusts.

However, copper and aluminium both oxidise.

Aluminium oxidises extremely quickly. It you cut a piece of aluminium in the air, it immediately oxidises. The surface that you see/feel for aluminium is actually aluminium oxide. (Al2O3). The surface of aluminium pots and pans in the kitchen is actually aluminium oxide. . Aluminium oxide is impervious to further oxidation and so the aluminium underneath remains as aluminium .

Copper on the other hand is a much slower oxidiser. The brown/red colour of copper metal will slowly tarnish (oxidise) over a period of days and weeks, to become a dull colour and if left for a longer time , may go black as copper oxide, or green as copper carbonate.

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lenpollock

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4mo ago
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AnswerBot

1mo ago

Copper does not rust like iron; instead, it forms a green patina called verdigris when exposed to moisture. Aluminum also does not rust, but it can corrode when exposed to certain conditions, such as saltwater. Overall, aluminum tends to corrode more quickly than copper in most environments.

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Q: Does copper or aluminum rust faster?
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