stainless steel in water

Discussion in 'Beginner Discussions' started by cswhitehead, 12 Dec 2010.

  1. cswhitehead

    cswhitehead

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    anyone know if its safe to have stainless steel in contact with tank water?
     
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  3. lIghty

    lIghty

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    I would rather avoid it, as SS still containes Fe and other elements!

    use Titanium if you can.
    Posted via Mobile Device
     
  4. MistaOrange

    MistaOrange

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  5. magman

    magman

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    don't some pumps and powerheads come with ss shafts, I think especially the smaller pumps, I had two old resun powerheads with ss shafts I think, rather avoid it like Justin said.
     
  6. Quintus

    Quintus the irish aXeman

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    What I'm going to say- "will be tough love" but some of you guy's sound like old granny's with old wife tales. S/S most common will be grade 316, because of it's low weir capabilities.
    note ceramic also weirs, otherwise why do we replace them.
    316 S/S will last longer.
    one gets 3 variations of 316. namely 316, 316l & 316ti.
    composition:
    C-0.08max
    Mn-0.0045max
    S-0.03max
    Si-1.0max
    Cr-16.0-18.0
    Ni-10.0-14.0
    Mo-2.0-3.0

    if you se there is moly. an element found is sea water.
    Nickel and crome do not react with water plain and salt. they even have resistance to acid compounds.
    Aqueous Corrosive Resistance. At 20 deg
    Concentration% by mass 10 20 40 60 80 100
    Sulphuric acid 0 1 2 2 1 0
    Nitric acid 0 0 0 0 0 1
    Phosphoric acid 0 0 0 0 1 2
    Formic acid 0 0 0 1 1 0

    where 0=resistant - corrosion rate less than 100µm/year
    1=partly resistant - corrosion rate 100-1000µm/year
    2=partly resistant - corrosion rate more than 1000µm/year.
    here is the kicker
    the performance of 316 base on a 10 year study.
    Enviroment corrosion rate µm/year
    rural 0.0025
    marine 0.0076
    marine industrial 0.0051

    Quintus.
     
  7. cswhitehead

    cswhitehead Thread Starter

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    Thanks for the info
     
  8. Quintus

    Quintus the irish aXeman

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    Pleasure Dude:)
     
  9. MistaOrange

    MistaOrange

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    Thanks :thumbup: now I've learned something new about the rod I'm using in my sump:1:
     
  10. Quintus

    Quintus the irish aXeman

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    Glad to help;)
     
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