Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Stainless Steel Stairs "rusting"?

  1. Back To Top    #1

    Join Date
    Jul 2013
    Location
    Grand Rapids, Michigan
    Posts
    55

    Stainless Steel Stairs "rusting"?

    We have a new pool installed this spring. A few weeks ago while swimming I noticed the ends of the steps on the ladder were discoloring or rusting. I asked the incompetent pool company that installed it about the issue and they said it had to do with the salt water. Salt water will rust the sainless steel stairs. Really? After 8 weeks? I asked for the name of the company that they purchased them from and calle dthem directly for verification. They said it's not the walt water at all but rather the brass bases that were installed in the concrete were not bonded correctly which is causing an electrical charge when exposed to salt water. I can't remember if the bases were bonded or not when the pool was installed. I know for a fact the rest of the pool was. Is there any truth to either rone of these? The pool installer won't do anything for me. I've attached a few pictures to show the issue.
    23,200 gallon in ground pool, Vinyl Liner, Salt Water, Variable Speed Pump Intelliflow 3hp/1.32SF/3.96 SFHP, Filter Pentair FNS PLus DE FNSP36, Heater Pentair Mastertemp 250, SWG Jandy APURE35PLG, TF-100 Test Kit

  2. Back To Top    #2

    Join Date
    Jul 2013
    Location
    Grand Rapids, Michigan
    Posts
    55

    Re: Stainless Steel Stairs "rusting"?

    Ok. I'm having trouble adding the pictures. Hopefully soon.
    23,200 gallon in ground pool, Vinyl Liner, Salt Water, Variable Speed Pump Intelliflow 3hp/1.32SF/3.96 SFHP, Filter Pentair FNS PLus DE FNSP36, Heater Pentair Mastertemp 250, SWG Jandy APURE35PLG, TF-100 Test Kit

  3. Back To Top    #3

    Join Date
    Jul 2013
    Location
    Grand Rapids, Michigan
    Posts
    55

    Re: Stainless Steel Stairs "rusting"?

    Can someone tell me how to post a picture? The path I'm following keeps giving me an error.
    23,200 gallon in ground pool, Vinyl Liner, Salt Water, Variable Speed Pump Intelliflow 3hp/1.32SF/3.96 SFHP, Filter Pentair FNS PLus DE FNSP36, Heater Pentair Mastertemp 250, SWG Jandy APURE35PLG, TF-100 Test Kit

  4. Back To Top    #4
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: Stainless Steel Stairs "rusting"?

    It very well could be an electrical current problem, but I doubt it's a natural battery effect from the bases. It may be worth removing the ladder and measuring the voltage between the anchors and the water.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  5. Back To Top    #5

    Join Date
    Jul 2013
    Location
    Grand Rapids, Michigan
    Posts
    55

    Re: Stainless Steel Stairs "rusting"?

    Not to sound dumb but what would I use to measure that?
    23,200 gallon in ground pool, Vinyl Liner, Salt Water, Variable Speed Pump Intelliflow 3hp/1.32SF/3.96 SFHP, Filter Pentair FNS PLus DE FNSP36, Heater Pentair Mastertemp 250, SWG Jandy APURE35PLG, TF-100 Test Kit

  6. Back To Top    #6
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: Stainless Steel Stairs "rusting"?

    A voltmeter, multimeter,DVM or DMM will do it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  7. Back To Top    #7
    gtemkin's Avatar
    Join Date
    Jun 2008
    Location
    Seattle, WA
    Posts
    738

    Re: Stainless Steel Stairs "rusting"?

    Brass and Stainless Steels are somewhat widely spread in the galvanic series and certainly could be a problem without any external voltage. Bronze (not Brass) is more commonly used in pool fixtures and would be much more galvanically compatible with Stainless Steels. Generally, in a salt water environment, you do not want dissimilar metals in direct contact. That said, a salt water pool is nowhere near as severe as an oceanic salt environment and I'm surprised how quickly corrosion has occurred. Stainless Steels are normally passivated (a surface finish process) to make them less active and less subject to corrosion. I'm not aware if this is commonly performed for pool ladders, but if it is, maybe the process was skipped for this ladder.

    Edit: Here's a good article on using Stainless Steels around pools.
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

  8. Back To Top    #8

    Join Date
    Oct 2007
    Location
    Valrico, FL
    Posts
    537

    Re: Stainless Steel Stairs "rusting"?

    Also all 300 series stainless steels are subject to "brown staining". This looks like rust. Chlorine, especially free chlorine helps the process along. Interestingly enough 300 series stainless steels should not be used in bleach solutions as it will leach out the nickel in the alloy. I do not know if the weak solutions we use in pools are strong enough for this to occur.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •