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Surface rust

Discussion in 'Basic Scuba Discussions' started by krispykritter, Jun 17, 2012.

  1. krispykritter

    krispykritter Solo Diver

    # of Dives: 200 - 499
    Location: santan valley AZ
    42
    1
    8
    I just bought 2 steel 72 tanks. One is galvanized and the other is painted. The painted one has surface rust in the boot area. How should I remove it and protect the surface after? Could I use a rust remover then sand the rest of the tank and paint it? Should I strip the whole tank with a chemical stripper? What products should I use? (product that I can find at the hardware store)? Is it ok to paint the galvanized tank too (so they match)?
     
  2. Teamcasa

    Teamcasa Sr. Moderator Staff Member ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Near Pasadena, CA
    12,122
    432
    0
    Surface rust (outside) is no big deal to clean up. Light sanding or scrubbing should do the trick. I'd avoid any rust removers. I would not paint the galvanized tank, is does not need it and paint has a hard time sticking to it. Besides, tanks do not have to match ;)
     
  3. Bob DBF

    Bob DBF Solo Diver

    # of Dives: I just don't log dives
    Location: Sonoma County, CA
    3,326
    2,345
    113
    I'm with Teamcasa, scrub off the rust and buy a boot that drains and it will be just fine.



    Bob
    ---------------------------------------
    I may be old, but I’m not dead yet.
     
  4. krispykritter

    krispykritter Solo Diver

    # of Dives: 200 - 499
    Location: santan valley AZ
    42
    1
    8
    Once the rust is scrubed off how should I cover the area to prevent future rust?
     
  5. Teamcasa

    Teamcasa Sr. Moderator Staff Member ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Near Pasadena, CA
    12,122
    432
    0
    This applies to the painted tank only: Once you have cleaned to rust off and sanded it smooth, you can paint it with a quality spray paint.
     
  6. spectrum

    spectrum Dive Bum Wannabe ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: The Atlantic Northeast (Maine)
    11,353
    805
    113
    Grit blasting will really clean rust from the pores. Start with a cold galvanizing finish. Rustoleum has a few, one matte and one with a little sheen. These are zinc rich coatings. There are other brands out there.

    You can use this same finish to touch up any blems on the galvanized tank like a hydro stamp or big gashes that have not healed. Other wise leave the hod dipped galvanized au naturale.

    Pete
     
  7. Paladin

    Paladin Solo Diver

    # of Dives: I just don't log dives
    Location: West Virginia
    2,326
    491
    83
    I would strip off the paint, clean off the rust and give the tank three or four coats of a good cold galvanizing compound. It's better than paint.
     
  8. cbrich

    cbrich Solo Diver

    # of Dives:
    Location: Austin
    812
    198
    43
    Just make sure you do a very good job at refinishing it, otherwise you might get questioned about it.
     
    Paladin likes this.

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