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Gold colored coating on unistrut?

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  • Gold colored coating on unistrut?

    What is the gold colored coating on unistrut?
    I was going to pick up some unistrut scraps from a construction project at work to practice mig welding on. But if that coating is hazardous when burned I'll look for something else.
    Thanks,
    Ralph Wenzl

  • #2
    It's a zinc-chromate conversion coating.
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    • #3
      You could always grind it off thats what I do with it.
      Matt

      MM 175
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      • #4
        ...and we assume there is no compressed gas or oil in that strut....
        "Good Enough Never Is"

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        • #5
          Hotfoot... this is unistrut:
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          • #6
            Electricians would come to me with that stuff to make hangers for buss ducts and support frames for electrical panels. The green powder coated stuff was had to strike an arc on difficult to ground without grinding off a clean spot.
            Arcin' and sparkin', Rocky D <><
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            • #7
              Originally posted by Hotfoot View Post
              ...and we assume there is no compressed gas or oil in that strut....
              I tried but it just won't stay in the Unistrut
              Ed Conley
              Screaming Broccoli, Inc
              http://www.screamingbroccoli.net/
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              • #8
                ..guess Unistrut...monoshock...I figured a Unistrut was a monoshock mounted beneath the seat on a unicycle..or somethin' like that... I never knew what those electrical racks were called, but have noticed them, and their nifty attachments, in the big hardware stores...
                "Good Enough Never Is"

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                • #9
                  Unistrut gets manufactured by lots of different outfits to lots of different engineering specs.

                  If it's gold colored, it's uaually anodized; galvanized is galvanized; some is painted with the toughest acid-reisrant paint I've ever tried to remove, etc.

                  I like it for projects where it is strong enough for the application because of all the holes. Makes mounting real easy!

                  Hank
                  ...from the Gadget Garage
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                  • #10
                    Originally posted by hankj View Post
                    If it's gold colored, it's uaually anodized;
                    Steel can't be anodized.

                    If it looks like this, then I'm tellin ya, it's zinc-chromate.
                    Last edited by Zrexxer; 12-14-2007, 04:49 PM.
                    Trailblazer 302 * Millermatic 212 * Syncrowave 180SD * X-Treme 12VS Feeder * Spoolmate 3035
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                    • #11
                      Originally posted by Zrexxer View Post
                      Steel can't be anodized.

                      If it looks like this, then I'm tellin ya, it's zinc-chromate.

                      Unistruts are made in aluminum as well

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                      • #12
                        Ok.

                        If it's steel unistrut, it's zinc-chromate; if it's aluminum unistrut, it's usually anodized. If it's cold Kettle One, it's usually drank.

                        Hank
                        ...from the Gadget Garage
                        MM 210 w/3035, BWE
                        HH 210 w/DP 3035
                        TA185TSW
                        Victor O/A "J" series, SuperRange
                        Avatar courtesy of Bob Sigmon...

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                        • #13
                          I've seen a lot of green unistrut. We made a rack for a painter one time to hang his paintings on to dry. This guy gets big bucks for his stuff, I'm still trying to figure out just what the **** it is.


                          Willy

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                          • #14
                            Originally posted by Willy Victor View Post
                            I've seen a lot of green unistrut. We made a rack for a painter one time to hang his paintings on to dry. This guy gets big bucks for his stuff, I'm still trying to figure out just what the **** it is.


                            Willy
                            Abstract dollar signs
                            Ed Conley
                            Screaming Broccoli, Inc
                            http://www.screamingbroccoli.net/
                            MM252
                            MM211
                            Miller Passport Plus, Spoolmate 100
                            TA185
                            SO 2020 Bender
                            Miller 125c Plasma
                            "Hold my beer while I try this!"

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                            • #15
                              Originally posted by Zrexxer View Post
                              Steel can't be anodized.

                              If it looks like this, then I'm tellin ya, it's zinc-chromate.
                              Yup. It's steel unistrut (the big boy's erector set) and that picture is exactly what the coating looks like.
                              So I think I'll look for some other kind of scraps to practice on.
                              Thanks for all the info guys.
                              Ralph Wenzl

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