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Re: [GrizHFMinimill] Re: Concrete in the MicroMill column?

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  • john r johnson
    Concrete is corrosive, but if you coat the inside with a material such as underbody undercoating you have a barrier that fights corrosion. You may have to
    Message 1 of 6 , Jan 20, 2004
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      Concrete is corrosive, but if you coat the inside with
      a material such as underbody undercoating you have a
      barrier that fights corrosion. You may have to pour
      in the mater4ial and let it run into the casting.
      Them position the casting so it is in different
      positions for the material to flow and coat the
      inside.

      Another material is Paint Over Rust coating POR15. It
      might work better and is consistency of paint.


      --- r68camaro <jguepe@...> wrote:
      > Concrete is corrosive, not sure what the long term
      > effect
      > would be.
      >
      >
      >


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    • fiteboss@yahoo.com
      Instead of concrete, how about an epoxy/tungsten composite? Concrete has a typical density of 2.3g/cm Epoxy tungsten has a density starting at 10g/cm... over 4
      Message 2 of 6 , Jan 20, 2004
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        Instead of concrete, how about an epoxy/tungsten composite?

        Concrete has a typical density of 2.3g/cm
        Epoxy tungsten has a density starting at 10g/cm... over 4 times as
        dense! No corrosion problems either.

        Gotta consider the coolness factor too. :)

        Tungsten powder starts at $8/lb

        http://tinyurl.com/2ay29

        Bryan Moody




        At 03:27 PM 1/20/04, john r johnson wrote:
        >Concrete is corrosive, but if you coat the inside with
        >a material such as underbody undercoating you have a
        >barrier that fights corrosion. You may have to pour
        >in the mater4ial and let it run into the casting.
        >Them position the casting so it is in different
        >positions for the material to flow and coat the
        >inside.
        >
        >Another material is Paint Over Rust coating POR15. It
        >might work better and is consistency of paint.
        >
        >
        >--- r68camaro <jguepe@...> wrote:
        > > Concrete is corrosive, not sure what the long term
        > > effect
        > > would be.
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