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How can Bright Zinc plated Steel Shelves go rusty in a Fridge?

  1. Mar 2, 2009 #1

    I have some Bright Zinc plated shelves which are currently being stored at 0-1'c. Over a period of 6 months they have become extremly rusty. How has this happened?

    Please help...
  2. jcsd
  3. Mar 2, 2009 #2
    Good question, though I don't have an answer. I have seen the same type of shelves do this, with the zinc plating flaking-off.

    My guess, is that there are different rates of expansion/contraction between the two metals, causing seperation and cracks in the zinc plating, allowing moisture to enter and cause rusting.
    But again, I don't know for sure.
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