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Old 22-07-2010, 14:01   #1
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Oxalic Acid

Hi all I have bought a boat with rust stains on the sails all along the wire and generally very dirty. I heard you can soak them in Oxalic acid. So I was thinking that I could put 15 litres of water into a 45 gallon drum add 3.4kg of the acid and soak sails for 30 minutes. Is this a good idea or not and will it affect the brass fittings? Thanks


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Old 22-07-2010, 14:17   #2
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Oxalic acid works fine and shouldn't affect fittings just try it on a small area first if not sure
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Old 22-07-2010, 14:26   #3
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for no mar rust removal at low price--barkeepers friend.....have fun!! good luck
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Old 22-07-2010, 14:36   #4
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Thanks I will order some and give it a go.
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Old 22-07-2010, 14:45   #5
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Removing stains and spots on Dacron sails:
Rust: Soak the area in a 5% solution of oxalic acid dissolved in hot water. Follow this with a 2% solution of hydrochloric acid in warm water and, finally, and then rinse the spot well with clear water.

The active ingredient in Barkeepers Friend is Oxalic Acid.
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Old 22-07-2010, 15:52   #6
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Originally Posted by GordMay View Post
[B]Removing stains...Follow this with a 2% solution of hydrochloric acid
I'd skip, or at least test first, the hydrochloric acid (muriatic acid) on the wire, brass or bronze fittings. It can be a bit violent with those. The resulting chloride compounds are not pretty. This is not an issue with oxalic acid.
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