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Corrosion of STEEL

  1. Jul 29, 2006 #1
    Say is a piece of steel is placed in still water and is corroding. Why will the corrosion rate drop away after time??

    Is it because the system reaches some sort of equlibrium??
  2. jcsd
  3. Jul 29, 2006 #2
    thats ment to say : "Say if a piece of steel........" NOT " Say is a piece..."
  4. Jul 29, 2006 #3
    I believe the layer of corrosion protects it. Corrosion rates are higher in moving water because the corrosion covering is always being washed away.
  5. Jul 29, 2006 #4
    that makes sense...... what you are saying is the oxide around the steel (rust) slows down the corossion rate
  6. Jul 29, 2006 #5


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    That is correct. This is the theory behind anodising aluminium (although aluminum oxide also exhibits excellent thermal insulation properties)
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