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Ultrasonic cleaner recommendations

Discussion in 'Repairing your own Gear' started by flymolo, Apr 7, 2021.

  1. flymolo

    flymolo Contributor

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    Thanks @rsingler. In the past I've just soaked the parts in white vinegar before rinsing and drying. I have heard of using muriatic acid as a substitute for white vinegar (iirc it isn't as harsh on chrome plating). Any experiences with that?
     
  2. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass Staff Member ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
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    7,881
    You do it, @couv
    Some of us don't yet have the luxury of lingering over our morning scotch coffee.

    @flymolo , I've only ever seen hydrochloric acid mentioned in Poseidon and, I think, old Sherwood manuals. Too harsh for me. It's quick, but I get forgetful. Not as bad as @couv , but I'd hate to come back to an old piece with thin chrome and just find brass.
     
    lexvil and couv like this.
  3. rob.mwpropane

    rob.mwpropane Contributor

    1,785
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    I'm not at all an expert, but muriatic acid can etch concrete and is overall pretty harsh. Can't breath it, don't want it on your skin, much lower pH than vinegar. I would think vinegar would be a lot safer and readily available.

    I use 50/50 vinegar/water on my rebuilds in a cheap U/S cleaner, so far so good.
     
    RyanT likes this.
  4. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    6,152
    4,040
    See the attached document. I basically use the method described by Pete Wolfinger in the Scubapro Technical Service Manual, October 01, 1994 except I substitute (heated) 15% phosphoric acid (by weight) in place of Hydrogen Chloride.

    I purchase food grade phosphoric acid from:
    Food Grade Phosphoric Acid, 85% Concentration | eBay

    Pictures of my "Bucket Brigade" and homemade colander.

    Bucket brigade.JPG homemade colander.JPG
     

    Attached Files:

    RyanT, axxel57, Ulfhedinn and 3 others like this.
  5. lexvil

    lexvil Contributor

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    4,774
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  6. lowwall

    lowwall Contributor

    # of Dives: 200 - 499
    Location: Chicago
    2,040
    2,220
    What about citric acid? I use it for descaling my coffee machine. It comes in powder form so can be easily mixed to any concentration.You can get it at any grocery store since it's used in canning and candy making, but I prefer something like this: https://www.amazon.com/Jansal-Valle...citric+acid+powder+2lb&qid=1618330235&sr=8-10

    Edit: To match the acidity of 50/50 vinegar/water, it looks like you'd use 4 Tablespoons (60ml) of citric acid powder per half gallon of water.
     
    couv likes this.
  7. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    6,152
    4,040
    :-D You tell us!
     
  8. lowwall

    lowwall Contributor

    # of Dives: 200 - 499
    Location: Chicago
    2,040
    2,220
    It works fine in my espresso machine :)

    Ok, I've got a paperweight reg I could test it on. I need a couple of tools to get it apart, but I'm going to buy them anyway for rsingler's online class. So I'll let you know in a couple of weeks.
     
    rsingler, couv and rob.mwpropane like this.
  9. Jim Lapenta

    Jim Lapenta Contributor

    # of Dives: 500 - 999
    Location: Canonsburg, Pa
    17,253
    9,404
    I bought a second Harbor Freight cleaner a couple months ago. I've been using my original one since 2010. It still works and heats up but I've been wondering if it has been doing as good of a job. So I got the second one. The new one I use with 50/50 vinegar and water. The older now has simple green mix in it for degreasing with heat and the ultrasonic function. The new one is a little quieter and seems to work a bit faster. I've rarely had to put anything through more than 2 180 second cycles.
    I service between 50 and 75 regs a year and so they get a fair amount of use.
     
    Ulfhedinn and couv like this.
  10. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    6,152
    4,040
    FWIW
     
    TTPaws, axxel57, Ulfhedinn and 2 others like this.

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