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Why aren’t greenhouse frames painted and why don’t they rust?

greenhouse garden17 Why arent greenhouse frames painted and why dont they rust?
SweetOne asked:


This is a question that my father wants to know for his gardening

  1. themonster54
    July 9th, 2010 at 00:22 | #1

    they are made from a non-ferrous metal, this means theres no iron in them, and metals need iron to rust for example, steel will rust because its made from an iron mixture, whereas aluminium wont, because it has only aluminium in it, no iron.

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