Zinc Rich Epoxy Primer

Discussion in 'Metal Boat Building' started by M&M Ovenden, May 19, 2017.

  1. M&M Ovenden
    Joined: Jan 2006
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    Location: Ottawa

    M&M Ovenden Senior Member

  2. MikeJohns
    Joined: Aug 2004
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    Location: Australia

    MikeJohns Senior Member

    Hi Mark

    The amount of zinc a zinc loaded epoxy can release is low because the epoxy encapsulates the particles. It won’t do any harm, there will be some benefit probably not as much as you imagine or the paint salesperson suggests. It certainly slows down the oxidation under damaged paint. However you do still get corrosion where paint is chipped, it just delays maintenance by a few months.

    If those minor visible rust blemishes are treated early and you don't knock your decks around the way a work boat is treated then there’s not a great advantage.

    Just for reference: Better cathodic protection is provided by zinc silicate primers than epoxy zinc primers but they have a surface that limits the use of various top coats.
     
  3. M&M Ovenden
    Joined: Jan 2006
    Posts: 359
    Likes: 77, Points: 38, Legacy Rep: 527
    Location: Ottawa

    M&M Ovenden Senior Member

    Thanks Mike,
    It doesn't sound like it's massive benefit, yet adds extra materials (different paint). I've been checking out various paint schedules for coast guard ships as a reference and it's an option.

    Mark
     

  4. pauloman
    Joined: Jun 2010
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    Location: New Hampshire

    pauloman Epoxy Vendor

    google aluthane -- a mcu (moiture cured urethane) anti corrosion primer
     
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