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Thread: Best way to neutralize oxalic acid?

  1. #1
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    Default Best way to neutralize oxalic acid?

    I put some oxalic acid on a piece of furniture I am refinishing to remove/lighten some stains (deck cleaner). It caused the stain in that area to be about two shades lighter than the other parts.

    What is the best/recommended way to neutralize? I have read that 50% ammonia/water. Also saw mention of baking soda.

    I'll have to sand off the poly finish anyway and start over.

    Many thanks

    tom

  2. #2
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    Default Re: Best way to neutralize oxalic acid?

    Plain water.

  3. #3
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    Default Re: Best way to neutralize oxalic acid?

    Tequila!

  4. #4
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    Default Re: Best way to neutralize oxalic acid?

    Quote Originally Posted by Glen Longino View Post
    Tequila!
    No.... Not Ouahaxal acid......"Oxalic acid"

  5. #5
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    Default Re: Best way to neutralize oxalic acid?

    Vinegar. Yes, it's an acid too, but it works.
    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

  6. #6
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    Default Re: Best way to neutralize oxalic acid?

    Quote Originally Posted by Mrleft8 View Post
    No.... Not Ouahaxal acid......"Oxalic acid"
    I suspected it along...you're a closet Mexican!

  7. #7
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    Default Re: Best way to neutralize oxalic acid?

    Not tryin' to be a wisea**, but wouldn't that info be on the bottle/box/package that the oxalic acid came in?
    "Simplicity, Clarisse! First principles..."

  8. #8
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    Default Re: Best way to neutralize oxalic acid?

    I've seen pictures of mrleft8's and Keith's work. I'd do anything they say, but I've always used baking soda. Dissolve oxalic AND baking soda in distilled water only.

  9. #9
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    Default Re: Best way to neutralize oxalic acid?

    Quote Originally Posted by LongIslandBoy View Post
    Not tryin' to be a wisea**, but wouldn't that info be on the bottle/box/package that the oxalic acid came in?
    Thanks. I rinsed with water. Maybe not enough. Package didn't give a lot of detail but it was deck wash.

  10. #10
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    Default Re: Best way to neutralize oxalic acid?

    Bump.

    Sanding and cleaning some masts.

    Ordered a great big bag of oxolic acid off ebay.

    Why only distilled water?

    Thanks

    Tom

  11. #11
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    Default Re: Best way to neutralize oxalic acid?

    Sure... distilled water if you got it. I've never bothered. No problems. Maybe because the water in this part of the country is pure?

    Safety first. Oxalic acid is a bit nasty. Don't want it on your skin. Absolutely don't want to be breathing it. After the oxalic acid dries... don't brush it off or blow <note edit - I see where your confusion came from> it off. Sluice it off with water. Then rinse again with a mild alkaline solution. Water with baking soda. Water with a dash of household ammonia. Remember this stuff is pretty mild, so you may need to do another application of oxalic acid... or two. Same rinsing procedure when you think you're done... but you don't have to do it after each hit of oxalic acid.
    Last edited by David G; 09-20-2015 at 01:07 AM.
    David G
    Harbor Woodworks
    http://www.harborwoodworking.com/boat.html

    "It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)

  12. #12
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    Default Re: Best way to neutralize oxalic acid?

    Thanks David. I'll be more carefull....next time....oops. Was pretty casual with it. I'll check the msds.

    Don't understand "sluice" as used here. Don't hose because it may splash?

  13. #13
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    Default Re: Best way to neutralize oxalic acid?

    Quote Originally Posted by bluedog225 View Post
    Thanks David. I'll be more carefull....next time....oops. Was pretty casual with it. I'll check the msds.

    Don't understand "sluice" as used here. Don't hose because it may splash?
    Hose is fine. Just don't stir up acid-particle dust.
    David G
    Harbor Woodworks
    http://www.harborwoodworking.com/boat.html

    "It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)

  14. #14
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    Default Re: Best way to neutralize oxalic acid?

    I use a weak Bicarb soln.

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