How to distinguish copper wire from aluminum wire?

The aluminum wire is silver-white, and the copper wire is fuchsia or black-green.The appearance of the pure copper wire that has not been oxidized and plated is said by purple, as long as the color of the play can be seen, it can be roughly judged whether it is pure copper wire. Oxidized or coated pure copper wire, scrape off the surface with a knife, or cut off, and then see if the cross section is purple-red. Pure copper wire will become red, black or green after oxidation.

Pure copper wire is ductile and soft to pinch, so it is pure copper wire.

The hardness of the aluminum wire is much higher than that of the copper wire.

After the fire, the aluminum wire melts but does not drip, copper wire becomes black.

 

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