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  • Rancid Coolant

    Just thought I would add my two cents worth..Coolant goes rancid very quick when doing cast iron..it even goes rancid over time...For those who don't know, try adding very fine shavings of copper into the coolant..I usually mill very fine cuts in copper to produce fine shavings..there is a chemical reaction with the copper that prolongs the longevity of the coolant...I have tried it and it works..I don't know exactly why..Also try getting a bubbler (like the ones you have in a fish tank) put it in your coolant tank and turn it on just enough to make a couple of bubbles a minute..I don't know why that works but believe me it does...keep your bubbler on at all times...It introduces air in the coolant or something..I used to use trim-sol...hate it...I then switched to blauser...hated it...now i use Valcool....like it....just something i learned over the years....

    brent

  • #2
    Brent

    Use of distilled demineralized water makes the best mix with regular or synthetic fluids. Good tip about the copper.

    Dave

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    • #3
      I'll try it, hope it works.

      Doall surface grinder at work doesn't get used much, it sure gets rank. We pour some pine-sol in it, helps some, as does just letting coolant run for a while, one of us needs to find a cast off fish tank pump. Coolant gets to smelling like a fish died in it, if we give that fish some air, maybe he'll live longer.

      Many thanks if it works.

      [This message has been edited by halfnut (edited 02-09-2002).]

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      • #4
        Bubbling air through the coolant will disolve oxygen into it which will inhibit the growth of those smelly anaerobic bacteria. At least I'll bet that's what's happening. Good suggestion. Maybe the copper has a similar effect.

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        • #5
          I'm sure that copper will kill off some bacteria, I use it every once in a while to treat some of my fish. Works pretty well too. Ony bad part is that when I first used it nobody told me it would also kill of snails. oops...

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          • #6
            Killed yer snails? Butter 'em up and have a snack! Yuummmm!

            You can buy tablets to throw in the sump. Getting the tramp oils out of the coolant greatly extends the life of the coolant.

            Sythetic coolants are not nearly as much trouble as "suds".

            Dave

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            • #7
              Read somewhere that bubbling ozone thru the stuff kills any living thing in the oil. On the plus side, the by products of this reaction is pure oxygen. As O3 (ozone) reacts with and kills living bacteria, it is converted to O2. Sounds friendly enough to me. So where does one buy a can of pressurized ozone???

              [This message has been edited by bdarin (edited 02-09-2002).]

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              • #8
                I had a chicken once that gave ozone eggs, was what you call an ozone layer, might try farm supply for more.
                Jim H.

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                • #9
                  Oxygen would rather be O2, that third O is just dangling there looking for something to react with. That's why ozone such a powerful oxydizer, and it's also not very stable. You need to generate it at point of use. In principle it's easy to do with an elecrical discharge. I don't know what the practical difficulties are, corrosion of the device itself is probably one. Its reactivity means there are health risks as well, probably best not to breath very much of it. It is beneficial high in the atmosphere, but a pollutant down here, at least in high concentrations. No doubt a Google search will uncover some interesting stuff, along with a lot of commercial sites selling hyped up and expensive generators.

                  [This message has been edited by Randy (edited 02-10-2002).]

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                  • #10
                    I use a bit of bleach in my coolant to keep the rancidity out. Does wonders.
                    CCBW, MAH

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                    • #11
                      any suggestions on the amount of copper to use per gallon of coolant?

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                      • #12
                        I don't have any suggestions on amount of copper...I have a CNC that holds about 20 gallons of coolant..I just get some copper on the vise and take about 20 passes or so about .010 deep, just enough to get fine shavings....I was told this method by a coolant salesman...But I have noticed more life out of my coolant...Because I have one particular job which are hydraulic pump housings made of ductile iron...I do the copper thing any time i am going to machine these parts...i don't have it down to a science yet..but it does work...better to have to much copper than not enough i suppose....

                        brent

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                        • #13
                          JC
                          ha ha...

                          Ozone would most likely be bad for the coolant as it reacts with lots of stuff. The bubbler does help (KBC sells them - buy an aquarium pump and save $$$).

                          Barium salts are used in diesel fuel additive to kill flora in the fuel. I do not know which exact chemical, but a call to a biology or chemistry department at the local University would get some answers. I would also ask if it is save for use, legal, what side effects on other metals, blah, blah, blah...

                          Dave

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                          • #14
                            Brent,

                            I scrounged up a scroungy piece of copper tubing last night, stuck it in lathe chuck and made some shavings. Not really that many, but they are now in coolant tank.

                            I'll report back if I remember.

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                            • #15
                              If any one is interested a good article regarding coolant just appeared in Haas's "CNC Machining" volume 6, #20, 2002. It was written by Carl Kuchler from Valenite. He is a technical consultant for their Valcool coolants & cutting fluids.

                              www.HaasCNC.com (American made, too!)

                              Dave

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