Advertise on Bikeforums.net



User Tag List

Results 1 to 8 of 8
  1. #1
    Bike Junkie roccobike's Avatar
    Join Date
    Jun 2005
    Location
    South of Raleigh, North of New Hill, East of Harris Lake, NC
    My Bikes
    Giant OCR-C, Specialized Tarmac, Specialized Stumpjumper FSR, Stumpjumper Comp, 05 Rockhopper, 88 & 92Nishiki Ariel, 01 Bianchi Campione, 87 Centurion Ironman, 92 Paramount, 97 Lemond
    Posts
    9,050
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Help with Oxalic Acid Use

    Ok, I've managed to work on vintage bikes for several years without using Oxalic Acid. I've finally decided to take the collective advice here and start using it. But I have some questions.
    1. The bottle I bought says it's concentrated and I should cut it by a factor of 4. Do you use it straight or cut?
    2. How long is safe to leave chrome parts and/or non-chrome parts in the bath?
    3. What happens if you put rubber in the acid bath? I have a chrome MTB seat post clamp that needs a bath bad, but it has a rubber tip that can not be removed. I don't want to ruin the rubber tip.

    Thanks for any help.
    Roccobike BF Official Thread Terminator

  2. #2
    Senior Member bibliobob's Avatar
    Join Date
    Apr 2006
    Location
    Chicago, IL
    My Bikes
    '53/'54 Bianchi CDM, late '50s Vic Edwards faux Peugeot, '62 Frejus, '62/63 Cinelli SC, '62ish Altenburger Cinelli Mod B, '72 Motobecane Grand Record, '73-74 Colngao Super, '74 Masi GC, '78 faux Confente, '82 Medici Gran Turismo, '85 Eddy Merckx Pro
    Posts
    2,897
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    What kind of OA did you buy? When I use wood/deck bleach, I heavily dilute (approx. 1 tablespoon of deck crystals into a gallon or two of water) and then soak items in the bucket overnight. If you want a mild solution, try Barkeeper's Friend. I mix it with a very small amount of water to make a paste. Use sponge applicator to rub on, leave for a minute or two, rinse off.

    Sorry, I have no idea about the rubber.

    And, in case people arent' aware, OA can alter paint.
    I grow old, I grow old. I shall wear the bottoms of my trousers rolled.

  3. #3
    Senior Member sykerocker's Avatar
    Join Date
    Dec 2005
    Location
    Montpelier, VA
    My Bikes
    The keepers: 1960 Raleigh Lenton Grand Prix, 1968 Ranger, 1969 Magneet Sprint, 1971 Gitane Tour de France, 1973 Raleigh Tourist, 1973 Lambert, 1973 Schwinn Super Sport, 2 - 1988 Rossins
    Posts
    3,809
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I've been using it for the past month in a very strong solution: 1/4 cup of the powder to a gallon of water. It's been working wonderfully. Usual soak is 24 hours, I've had stuff forgotten for days in it with no problem.
    Syke

    "No wonder we keep testing positive in their bicycle races. Everyone looks like they're full of testosterone when they're surrounded by Frenchmen." ---Argus Hamilton

  4. #4
    Senior Member
    Join Date
    Oct 2010
    Location
    Minnesota- the frozen tundra
    My Bikes
    1977 Raleigh Super Grand Prix, 1976 Gitane Tour de France
    Posts
    1,938
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I couldn't find oxalic locally but my hardware store had something on the shelf for removing rust and rust stains in a spray bottle and the active ingredient is Phosphoric acid.

    I decided to try it, I don't have any set mixture but I used a couple gallons of water in a plastic tub and added a few ounces of the product and it's been working extremely well.

    Eats the rust and leaves no residue, I accidentally put in one of those old perforated headset washers off a Peugeot in there and it started to foam like an alka seltzer almost immediately so I yanked it out and rinsed it quickly.

    I was using Naval jelly but it's a lot more time consuming and you really have to watch it.

  5. #5
    Senior Member peripatetic's Avatar
    Join Date
    Oct 2004
    Location
    NYC
    My Bikes
    All 70s and 80s, only steel.
    Posts
    2,124
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Curious why people prefer Oxalic acid over Naval Jelly? (Naval Jelly, btw, has phosphoric acid as its active ingredient.)

  6. #6
    Senior Member sauze's Avatar
    Join Date
    May 2010
    Location
    Winnipeg
    Posts
    930
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I believe i've read that Oxalic Acid is not as diluted as Naval Jelly (I have no personal experience with either)

  7. #7
    Bike Junkie roccobike's Avatar
    Join Date
    Jun 2005
    Location
    South of Raleigh, North of New Hill, East of Harris Lake, NC
    My Bikes
    Giant OCR-C, Specialized Tarmac, Specialized Stumpjumper FSR, Stumpjumper Comp, 05 Rockhopper, 88 & 92Nishiki Ariel, 01 Bianchi Campione, 87 Centurion Ironman, 92 Paramount, 97 Lemond
    Posts
    9,050
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the comments. I can see as far as the dilution, I'll have to do trials to see whats best, the same with the amount of time in the bath. My first few tries have been pretty good. It sure beats trying to clean up a piece with Brillo.
    Roccobike BF Official Thread Terminator

  8. #8
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    18,869
    Mentioned
    71 Post(s)
    Tagged
    1 Thread(s)
    Al,

    #1. Take back the bottle stuff, it is expensive water (very dilute). The stuff in a bottle is a huge ripoff. Instead, go to Sherwin Williams paint store and buy the pure oxalic: 12 ounces will cost you about $9. FWIW: I buy it five pounds at a time from Van Dykes (mail order) for about $12 as I recall. But you don't need that kind of quantity. Stop by Waynesville and I will give you some.

    2. How long is all about concentration. I use the solution really dilute (so it takes longer to work, but costs less and is easier to handle: a concentration by weight of about 0.2% to 0.4%). At that strength, I let it sit for about 24 hours. And then I keep reusing the solution, several times, til I need the room and then I dump it. My current bath has treated at least ten frames.

    3. Most rubber is pretty acid resistant. I would probably test something first, or just treat it briefly. Recognize that there are a lot of different materials that people call "rubber", it is not all the same for sure.

    4. Why not naval jelly? Try soaking the inside of a frame, an entire frame or fork in naval jelly. I don't see a way it would work. Oxalic is cheap and effective. Why use something more costly and less effective? For small spot treatment, use the weapon of your choice: naval jelly or whatever.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •