The difference between them is mainly in chemical composition. The content of iron and silicon in primary aluminum is very low.
The content of iron in primary aluminum is below 0. 12%, while the content of iron in recycled aluminum is above 0.25%. The difference in silicon content is even greater. Generally, the silicon content of electrolytic aluminum is below 0.09%, while the silicon content of recycled aluminum is above 0.2%.
It is obviously impossible to analyze the ingredients through experiments ~
What we can do is:
1, look at the cross section: the cross section gloss of recycled aluminum is different from that of primary aluminum. The light emitted from the cross section of primary aluminum is a very dazzling mirror light with a strong metallic feeling. The cross section of recycled aluminum has no luster, and even has a dull and rusty feeling.
Some photos can't be seen, but it will be obvious to look at the scene from another angle.
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