Oxalic Acid!

[ianwright]

I last bought 20lbs oxalic acid at £1 per lb fifteen years ago and was running a litle low so I was pleased to find it a a sensable price again from
http://www.rydenor.co.uk
5 kg for under a tenner delivered, and it got to me in less than a week, not bad eh?
Normal disclamer, I'm just a yotti who would rather mix his own...

IanW

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[Mirelle]

Thanks. I feared, from the title, that you had discovered that it was no longer get-able due to some EU-type regulation. Happily not!

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[iangrant]

Ian

A very big thanks - ordered and confirmed..

Ian

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[Neraida]

Which way round is it again???

Water to acid or acid to water???

Think its the last one... Dr Barnes would probably lob his board rubber at me for asking that question...

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[oldsaltoz]

Acid to water

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[ianwright]

Acid to hot water, 2 oz to a pint.
IanW

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[dieselhead]

what do you use it for??

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[VicS]

Acid to water applies to diluting sulphuric acid, in which case it is very important, but not any other that I've come across. Oxalic acid is what is called a weak acid and is not what I would regard as particularly hazardous to handle. Use of hot water to dissolve as suggested elsewhere is a good idea as it takes a while in cold water. Use non metallic containers.

Remember that it is quite toxic, so avoid ingesting, keep safely out of childrens reach and dispose of waste and residues carefully.

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[ianwright]

Why?

Cleaning/bleaching teak mainly.

IanW

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[iangrant]

Re: Why?

and does a fine job removing fibre glass yellowing above the water line and removing rust streaks and residual rust from stainless fittings..

Ian

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[ianwright]

Fiberglass, Rust, Stainless...?

Ah, you must be one of the modern types. Do you think fiberglass will ever catch on?

IanW

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[iangrant]

Re: Fiberglass, Rust, Stainless...?

might do, but only if it's thik enuff, like me..


Ian

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[sailorman]

it all sounds like rhubarb to me

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[VicS]

Re: Rhubarb

Yes that's right especially the leaves!

Perhaps you could grow masses of the stuff, extract the oxalic acid and make your fortune selling it to yachtsmen for cleaning off rust stains and renovating their teak bits.

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[polarity]

Re: Rhubarb

Watch out for the toxic leaves!
http://www.rhubarbinfo.com/rhubarb-poison.html#TOC82

(there just had to be a website dedictated to Rhubarb!)

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[VicS]

Re: Rhubarbinfo.com

"There just had to be a website.........."

and there just had to be someone who would find it!!!!!!

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[pheran]

So, having got your Oxalic Acid solution, how do you apply it to (say) teak decking? With a cloth/sponge/hard brush? How long do you leave it before washing off?

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[ianwright]

Just paint it on with a soft paint brush, enough to wet the teak well. You will see the bleaching effect within moments but leave it on for 20 mins then hose it off, and make sure not to leave any on painted topsides or varnish. Left too long on paint it will reduce the gloss,,,,,,,,,, but there is no point in leaving it on that long.

IanW

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[Joe_Cole]

If you are using it on the hull, or on any other vertical surface then the old trick is to mix it with wall paper paste to give it some "body". You need a very thick mix because, when you add the acid it thins it down a lot. As someone else has said, it works very well on yellowed waterlines.

Joe

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