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Anodizing over my welds

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  • Anodizing over my welds

    Hello everyone: Does anyone out there have any experience with having welded parts anodized? If so, can anyone give me an idea as to why a perfectly gorgeous weld going in to the anodizing tank comes out charcoal grey? This is CLEAR anodizing, done by quite a reputable company, so the process should not be flawed, but I have these pristine, clear aluminum weldments peppered with charcoal welds. Thanks, Rev.
    Miller 350P XR push/pull
    Miller 250 DX
    Spectrum 2050 Plasma

  • #2
    Don't quote me on this, but i don't think all filler material can be anodized,
    what is the filler you used? what is the material you welded?

    Comment


    • #3
      Originally posted by Revlimit
      Hello everyone: Does anyone out there have any experience with having welded parts anodized? If so, can anyone give me an idea as to why a perfectly gorgeous weld going in to the anodizing tank comes out charcoal grey? This is CLEAR anodizing, done by quite a reputable company, so the process should not be flawed, but I have these pristine, clear aluminum weldments peppered with charcoal welds. Thanks, Rev.
      The higher Si content of a 4043 filler causes the darkening of the weld after anodizing a 6061 alloy part. If you use 5356 as a filler next time you won't have this problem.

      Here's some info. that should answer any of your future aluminum welding questions:

      http://www.alcotec.com/techpage.htm
      http://www.alcotec.com/atasap.pdf

      -dseman

      Comment


      • #4
        Originally posted by Revlimit
        Hello everyone: Does anyone out there have any experience with having welded parts anodized? If so, can anyone give me an idea as to why a perfectly gorgeous weld going in to the anodizing tank comes out charcoal grey? This is CLEAR anodizing, done by quite a reputable company, so the process should not be flawed, but I have these pristine, clear aluminum weldments peppered with charcoal welds. Thanks, Rev.
        I would agree that it's the filler you used. I'd bet you used 4043.

        Comment


        • #5
          Revlimit,

          Here is an informative and interesting article from Miller Powerclick on a company using the bump technique to weld anodized. Check it out: http://www.millerwelds.com/education...s/story93.html
          Check out the picture the bottom of the page. I copied the image, but it's a bit fuzzy.
          Attached Files

          Comment


          • #6
            dseman..you nailed it, I did use 4043 0n 6061. Thanks for the insightful replies everyone. This is an awesome forum. By the way, besides the issues I'm having, what are the pros and cons of using 4043 vs 5356 while welding 6061? Thanks again, Rev.
            Miller 350P XR push/pull
            Miller 250 DX
            Spectrum 2050 Plasma

            Comment


            • #7
              don't know if this will be of any help:
              Attached Files

              Comment


              • #8
                Originally posted by Revlimit
                dseman..you nailed it, I did use 4043 0n 6061. Thanks for the insightful replies everyone. This is an awesome forum. By the way, besides the issues I'm having, what are the pros and cons of using 4043 vs 5356 while welding 6061? Thanks again, Rev.
                Rev*,
                How come you didn't check out my links? The answer is in there...page2,3 of
                the atasap.pdf document. It's a big table where you select which materials are to be joined and which filler to use. It shows the tradeoffs between ease of welding, strength, ductility,corrosion resistance, service temperature, and color match after anodizing. Kinda like pumpkin's table but much more comprehensive.

                There is a lot of good information in there, but you have to read it. Geez,
                I gotta stop giving away the good stuff if people aren't going to use it.....

                -dseman

                Comment


                • #9
                  Hmmmm...all I can say is that I DID check them out. The first link is now saved into my welding folder, and I believe the second link was on the site the first link took me to. Thanks again.
                  Miller 350P XR push/pull
                  Miller 250 DX
                  Spectrum 2050 Plasma

                  Comment


                  • #10
                    dseman,
                    if I would of checked 'em out, i wouldn't have posted mine, oops.
                    didn't mean to step on your toes.

                    Comment


                    • #11
                      Originally posted by PUMPKINHEAD
                      dseman,
                      if I would of checked 'em out, i wouldn't have posted mine, oops.
                      didn't mean to step on your toes.
                      No problem pumpkin, it's just a personal, pet peeve of mine, that when I
                      go through the trouble of solving someone's problem they sometimes
                      don't bother taking the time to read the answer. Revpol did however,
                      but must not have read far enough to get to the table.

                      Another pet peeve, not using the search engine. Most of these questions have been answered before--it saves everybody time by doing a quick search first.

                      -dseman

                      Comment


                      • #12
                        Wow, you must be a PLEASURE to work with. Tell you what dseman....in the future, please don't reply to my posts. There, problem solved. Rev. By the way, that was my PC reply.
                        Miller 350P XR push/pull
                        Miller 250 DX
                        Spectrum 2050 Plasma

                        Comment


                        • #13
                          Syncro-start

                          In the Artical That HAWK posted the refrence was made to the "syncro-start", is this a new base feature or can it be added to an older model 250 Syncro?

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