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can pot metal be brazed?

Discussion in 'The Hokey Ass Message Board' started by oilslinger53, Dec 12, 2008.

  1. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    I want to mold my hoodbird into the hoodstrip, and can braze, but dont want to destroy a perfectly good hoodbird trying the impossible.
     
  2. Flop
    Joined: Jun 8, 2006
    Posts: 3,885

    Flop
    Member

    last time i put heat to pot metal screwin around for fun on a pitted to **** trunk emblem it turned into a puddle before i knew it haha!!! so i would say do some practice on sumthin else so you can get an idea for the heat.
     
  3. Stu D Baker
    Joined: Mar 4, 2005
    Posts: 2,816

    Stu D Baker
    Member
    from Illinois

  4. lostn51
    Joined: Jan 24, 2008
    Posts: 3,753

    lostn51
    ALLIANCE MEMBER
    from Tennessee

    The last time I had to weld on any pot metal (top bows for a 1950 Ford convertible) I used a Zinc rod and my tig. Unfortunately you can not get them any more (the zinc rods) that I know of but you might could make you some if you can find some zinc. They used to use them for galvanizing the welds on galvanized metal, this was years before they came up with a zinc based spray paint.

    But for welding your hood bird to your car I would try a Silicon Bronze rod with a Tig set up. This is how I used to weld ferous to non ferous metals together, flows great and you have a very nice finished weld.
     
  5. lostn51
    Joined: Jan 24, 2008
    Posts: 3,753

    lostn51
    ALLIANCE MEMBER
    from Tennessee

    Dont even consider these, I have welded for 30 plus years and have welded just about every kind of metal thats out there.

    A buddy asked me to come weld a crack on his 8BA block with some of those rods and I just about destroyed the damn thing. I had to go home and get the correct rod to fix the f@#K up.
     
  6. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    i wonder if i could grind some off of a galvanized pipe, and make the dust into a rod in my buddys kiln.it would take a while to get enough to use, but i got more time than money.... anyone know the melting tempurature of zinc? his kiln goes to 1500 degrees. Or,are there any kind of plateable epoxys out there anyone knows of?
     
    Last edited: Dec 12, 2008
  7. lostn51
    Joined: Jan 24, 2008
    Posts: 3,753

    lostn51
    ALLIANCE MEMBER
    from Tennessee

    I was thinking more like using Zinc pellets that the platers use for cadmium plating. As far as the melting point I would think it would be close as to what silver soldier is because you could rub the rods on the welds after heating them up with a torch to galvanize them.
     
  8. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    thanks, im gonna get some junk ornaments and zinc pellets and see what i can do.
     
  9. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,504

    Unkl Ian

    Why don't you just buy the correct Solder ?:confused::rolleyes:
     
  10. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    these guys are saying its hard, or impossible to find zinc rods. know where to get some? would save me alot of trouble.
     
  11. HR Classic Cars
    Joined: Aug 11, 2008
    Posts: 308

    HR Classic Cars
    Member
    from Wylie, TX

    Done this before with pot metal, works great and plates well.. just keep the heat low and work in small sections.
     
  12. careyohio
    Joined: Jun 6, 2008
    Posts: 410

    careyohio
    Member

    Be VERY careful ...zinc pot metal that is pitted can explode when it is heated...ask me how I know !!!!!
     
  13. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    haha... dually noted!
     
  14. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,504

    Unkl Ian


    Which search engine did you try ? :confused:




    A couple minutes found these:
    http://www.alumite.com/
    http://www.rotometals.com/Solders_c_22.html
    http://modeltech.tripod.com/soldering.htm
    http://www.caswellplating.com/aids/solderit.htm
    http://www.finescale.org.uk/show_page.php?pid=101
    http://www.ccis.com/home/hn/index_files/Page6.htm
    http://www.muggyweld.com/grille.html
     
  15. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

  16. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    oh no, i'll be using gas. i have no access, or experience with a tig welder.
    i have a mig, but i still prefer to braze in many situations. pops taught me to do it young, and i do it often at work changing refrigerator compressors
    the old ways wont die. at least not in my lifetime. i'd like to get, and learn tig, bu ill still always braze, soldier, and gas weld stuff

     
  17. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,504

    Unkl Ian

    Melting temperatures, from Matweb.com :


    Tin 449.5 F
    Pewter 471-563 F
    Lead 621 F
    Zinc 787 F
    Br*** 1510 - 1880 F
    Bronze 1400-1970 F
     
    Last edited: Dec 12, 2008
  18. noboD
    Joined: Jan 29, 2004
    Posts: 9,049

    noboD
    Member

    You can buy zinc in bar form from McMaster-Carr.
     
  19. BuiltFerComfort
    Joined: Jan 24, 2007
    Posts: 1,619

    BuiltFerComfort
    Member

    I was thinking of trying 'all metal' (think JB Weld with metal powder in it) to fill the pits, sand it smooth, and then powder coating it with the chrome-like powder. Would that work? (I can't see why not, but I've never tried it.)
     
  20. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    that would work, but its gotta be chrome for me. nothin' shines like reeal chrome!
     

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