Sails, Rust stains

[FAITIRA]

Any 'safe' method to remove a , not big, rust stain from the main? Thanks, Bill.

 

[swampthing]

Oxalic acid. From your chemist, or if you must pay 10x, chandlers .AKA Teakbrite.Brush it on ,stain will vanish in 5 min

 

[alan]

................ and give it a VERY thorough wash, two or three times, with clean water afterwards!!!!


Alan

 

[VicS]

[ QUOTE ]
Oxalic acid. From your chemist

[/ QUOTE ] Past experience is that not all pharmacies will get it for you. Can be bought for wood treatment though from AG Woodcare

 

[FAITIRA]

I have some Vic (crystals), what concentration would you suggest?

 

[Rabbie]

Loads for sale on Ebay!

 

[swampthing]

Make a saturated solution, add water to the crystals so that some remain undissolve at bottom of jar ,use cold water.Its not a very agressive acid. My chemist sold me it instantly once I explained what was doing

 

[swampthing]

Bye the way KBT, you say you had some allready? Is it good for something else apart from wood and rust stains?

 

[FAITIRA]

[ QUOTE ]
Bye the way KBT, you say you had some allready? Is it good for something else apart from wood and rust stains?

[/ QUOTE ]

I,ve used it on wood and rust stains on the grp, never on sails, 'yet'. Bill.

 

[Rabbie]

[ QUOTE ]
Its not a very agressive acid.

[/ QUOTE ]
Eye and skin protection still required!

I used it yesterday for the first time, on very blackened teak grab-rails. 30 minutes later I was amazed at the improvement - rails look like new.

 

[swampthing]

If your a numpty and cant control a brush, eyecare required. Its a little lower ph than lemon juice. ---Mild

 

[FAITIRA]

[ QUOTE ]
Any 'safe' method to remove a , not big, rust stain from the main? Thanks, Bill.

[/ QUOTE ]

MANY thanks for the info lads, I will have a go with the oxalic in the morn. Bill.

 

[VicS]

[ QUOTE ]
what concentration would you suggest

[/ QUOTE ] Probably as one of my former colleagues would have said "a slack handfull in a jug of water".
It is not what you would call very soluble so saturated, or nearly so, would probably be about right. It is slow to disslove in cold water so warm water would be sensible.

It is what is termed a weak acid but it is corrosive, it is harmful and it is rather toxic so goggles and gloves would be sensible precautions. Keep any unused labelled and out of sight and reach of children.

Look at this page http://www.agwoodcare.co.uk/gbu0-prodshow/oxalic_acid.html on the Agwoodcare site and follow the links to the Instructions for use and the safety data sheet, but dont let the latter frighten you.

I cannot find a reliable figure for the solubility, possibly because it is available in both the anhydrous and hydrated forms. (Before anybody quotes it back at me I have read 90g/litre from the above safety sheet If correct that's for the anhydrous material I would suppose and would make it 126g/litre for the dihydrate)

 

[FAITIRA]

Thanks for that Vic! Bill.

 

[AngusMcDoon]

If you've not solved it yet or got hold of oxalic acid, Stain Devil for rust does the job too. Get it in Tesco or similar.

 

[FAITIRA]

[ QUOTE ]
If you've not solved it yet or got hold of oxalic acid, Stain Devil for rust does the job too. Get it in Tesco or similar.

[/ QUOTE ]

Thanks Angus, no too cold today to do it! will see if I can find it, or similar here tomorrow, it would be a bit more conveniant. Bill.

 

[Vara]

As you are in France don't get it from chemist/Pharmacy, it will cost an arm and a leg. Quincailler........(hardware shops) and decorating supply shops sell it at reasonable prices. €4 for 1kg IIRC.

Acide Oxalique

 

[FAITIRA]

Thanks for the tip colmce, I need to top up for the teak whatever!!! Bill.