Part Pickling Tutorial

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  • wlambing
    Commander

    • Nov 2020
    • 322

    Part Pickling Tutorial

    Way back as a young'n, my friends and I had fun making bad things with a junior Dr. Frankenstein chemistry set. The pressure sensitive explosive we never could duplicate comes to mind. We hear and read of pickling but not much is presented about how to get, or make pickling juice suitable for our needs. Could someone please post a tutorial for both dry and liquid ferric chloride conversion to pickling juice? I imagine that percentage concentrate is important in the end. Thank you!
  • Albacore 569
    Commander

    • Sep 2020
    • 428

    #2
    Why do you need a pressure sensitive explosive for? Pickling for?

    Comment

    • Subculture
      Admiral

      • Feb 2009
      • 2223

      #3
      I think he's referring to nitric acid. Not very nice stuff, stick with ferric chloride it's rather more benign. You can purchase it premixed or in crystal form, the package will tell you the dilution, but it's not super critical I find. Warming it up and agitation of the solution speeds the etching process up considerably.

      If a clear etching solution is desirable you may want to consider Sodium Persulphate instead.

      Comment

      • wlambing
        Commander

        • Nov 2020
        • 322

        #4
        I don't need an explosive fluid, Steve! That was just an illustration of fun stuff with a chemistry set! The f. chloride I inherited is very dark in the container, so I would like to know what percentage to use to pickle my metal parts. Anyway, I'm going deep!

        Comment

        • He Who Shall Not Be Named
          Moderator

          • Aug 2008
          • 12809

          #5
          Originally posted by wlambing
          I don't need an explosive fluid, Steve! That was just an illustration of fun stuff with a chemistry set! The f. chloride I inherited is very dark in the container, so I would like to know what percentage to use to pickle my metal parts. Anyway, I'm going deep!
          It's contaminated but still good for pickling copper bearing alloys. I have a jug that's almost black from decades of use and it's still viable for the job. Use with caution on aluminum based alloys though -- dilute the hell out of that mix before dipping.

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          Who is John Galt?

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          • Ken_NJ
            Captain

            • Sep 2014
            • 815

            #6
            You're saying an old used solution is still usable as a pickling solution prior to painting?

            I have a Radio Shack bottle that must be over 10-15 years old. Maybe it's ok for this purpose, pickling, have to try it. BUT, due to it'\s age it seems to have lost some of its power to be used to fully etch a PCB. I'm sure it must have a shelf life.

            Comment

            • He Who Shall Not Be Named
              Moderator

              • Aug 2008
              • 12809

              #7
              Originally posted by Ken_NJ
              You're saying an old used solution is still usable as a pickling solution prior to painting?

              I have a Radio Shack bottle that must be over 10-15 years old. Maybe it's ok for this purpose, pickling, have to try it. BUT, due to it'\s age it seems to have lost some of its power to be used to fully etch a PCB. I'm sure it must have a shelf life.
              It ages because of use -- a buildup of oxides polluting the acid. Sure, it's weaker than when first used, but that's an issue an extended immersion time and increased temperature will fix. Stop making a big deal out of this -- your juice is still tangy and great on a salad.

              YOU PEOPLE!

              David
              Who is John Galt?

              Comment

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