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Thread: Zinc Plated Bolts Revisited

  1. #1

    Default Zinc Plated Bolts Revisited

    I started a thread months ago, about how to paint zinc plated bolts heads, to make sure the primmer would hold. I got lots of conflicting advice from both here and from other sources so I decided to experiment. I took three bolts and primed 1 with rattle can primer, 1 with commercial sandable automotive primer and one with PPG epoxy primer. Then, they were painted with Gillespie 24087. After a few weeks, I took an awl and tried to scratch them. The primer failed in all but the epoxy primed one. The primmer flaked off the other two but held on the epoxy. Just thought this may help others. I have now painted all my replacement bolts using epoxy primmer. Some nuts will need to be painted separately after installation. A picture of my bolt head paint board is below;


  2. #2
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    Great info....THANKS for posting it!

  3. #3
    Join Date
    Dec 2003
    Location
    SF Bay Area, CA
    Posts
    499

    Default

    Yes, Thanks for the info!

  4. #4
    Join Date
    Jul 2007
    Location
    Rhoadesville, Virginia (five miles from no place)
    Posts
    5,125

    Default

    Good to know.....Now you gotta put all those bolts back in!
    "Free advice is worth what you pay for it."™

  5. #5
    Join Date
    Jan 2004
    Location
    Washington State
    Posts
    1,652

    Default

    I hope the socket or wrench you'll be using won't harm the paint. I usually brush the bolt heads after assembly or assemble then paint. Thanks for the information, that's good to know.

  6. #6

    Default And Thats Just The Painted Ones!

    Yea Randy, and thats not all of them. I've already replaced lots of non-painted ones!

  7. #7

    Default

    Did you consider powder coating?

    Zach

  8. #8
    Join Date
    Jul 2007
    Location
    Rhoadesville, Virginia (five miles from no place)
    Posts
    5,125

    Default

    Quote Originally Posted by vacca rabite View Post
    Did you consider powder coating?

    Zach
    The only problem we've had with powder coating fasteners has been that it changes the size of the fastener head once the powder is applied and baked.

    Not sure if they make OD powder yet either.
    "Free advice is worth what you pay for it."™

  9. #9

    Default

    I wondered about the OD of the nut issue. They have PC for jsut about every color under the sun these days. I'm sure the the army is coating some of thier stuff these days, but I can't say for sure one way or another. All the PC stuff that I have seen has held up way better then paint.

    Zach

  10. #10

    Default No more tools!

    Did not consider power coating at all. And, last thing I need is more equipment!

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