Rust Converter

[carlyai]

Before I make the 200 km trip, does anyone know if Global House, Thaiwatsadu or similar stock rust converter?

 

The stuff that I remember comes in a smallish container. You paint it on and it neutralizes the rust spots (I think).

 

 

 

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[Crossy]

It's not something I've seen here.

 

I would wait until you need something else before trekking 200km ?

 

[bankruatsteve]

Rust is the oxidation of iron.  It doesn't convert back to iron by applying some solution.  At best <whatever> would stop the oxidation process by eliminating the contact to air and moisture.  You are much better to brush/sand off the rust and re-prime and paint the affected area.

[sirmud63]

rust coverter is just nitric acid . 

should not be hard to find it here .

[Crossy]

9 minutes ago, bankruatsteve said:

It doesn't convert back to iron by applying some solution. 

Indeed, but these things do actually work to protect against further rusting, I've used in large quantities on my first (already ancient) vehicles.

 

https://en.wikipedia.org/wiki/Rust_converter

 

3 minutes ago, sirmud63 said:

rust coverter is just nitric acid

According to the Wiki link above:-

 

Quote

Typical ingredients
Commercial rust converters are water-based and contain two primary active ingredients: Tannic acid [1] and an organic polymer. Tannic acid chemically converts the reddish iron oxides into bluish-black ferric tannate, a more stable material.[2] The second active ingredient is an organic solvent such as 2-Butoxyethanol (ethylene glycol monobutyl ether, trade name butyl cellosolve) that acts as a wetting agent and provides a protective primer layer in conjunction with an organic polymer emulsion.[citation needed] Some rust converters may contain additional acids to speed up the chemical reaction by lowering the pH of the solution. A common example is phosphoric acid, which additionally converts some iron oxide into an inert layer of ferric phosphate.[3]

 

1

 

[ThaidDown]

Loctite Naval Jelly does not change the rust back to iron , the phosphoric acid that it contains converts the iron oxides  to iron phosphate which is water soluble therefore can be washed off.

 

Back to the topic, I have bought Naval Jelly from Homepro a few years ago and also recently Rust Dissolver Jel by Permatex (also contains phosphoric acid) from the same place.. The latter coming in an eight oz bottle, cannot remember price.

 

First looked for it in the paint preparation area but actually found it next to the WD40 and other oil sprays

 

Of course cannot guarantee that your nearest Homepro will have it in stock.

 

Edit to add.. Homepro online shows it but unfortunately 'out of stock' Some stores may still have it on their shelves but hardly worth a long trip on the offchance.

Link to Homepro for info https://www.homepro.co.th/product/259285

 

[johng]

You can try electrolysis

http://antique-engines.com/electrol.asp

 

I had quite good success  using an old PSU from a computer as power source

on my motorcycle tank...also reversed the polarity  and ( kind of)

zinc plated the inside...

 

Before lots of rust

 

The Zinc rod

 

De rusting  in the sink !

 

reverse polarity and plate the inside

 

Almost clean as a whistle

 

wifey was not to happy about  petrol tank in kitchen sink for 2 days ..or I would have carried on till all the rust was gone.

 

[bankruatsteve]

Removing rust or converting rust to something else does nothing to prevent continued rusting UNLESS whatever is done prevents further oxidation.  It looks like these "converters" are actually primers that absorb rust.  Whatever.

[Anythingleft?]

They have rust converter in Baan Amphur Jomtien Pattaya, I love the stuff. Use it all the time at work.....

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[carlyai]

Thanks for the replies. As I was not sure if I could find a shop selling rust converter after a 200 km trip, I decided to give it a miss this time and rubbed back to bare metal and coated the spots with red oxide paint.



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[kamalabob2]

Rust Converter is readily available in Buriram Thailand. ATM is a budget brand of the Urai Chemical Group which have their own delivery trucks which transport Galant House Paint, Lobster Paint,  and other reasonably priced paints and home improvement products to builders merchant stores large and small in Thailand. The Urai home improvement products are made in Thailand and sold at a fraction of the cost of imported similar Home Improvement products. I've had success with the rain gutter leak sealer and the Fabric spray I bought in Buriram. 

[kamalabob2]

This is the web site of the company that makes the ATM rust converter. They may show dealers in your Thailand Province.  http://www.urpaints.com/en_index.html

[CGW]

On 8/3/2018 at 8:36 PM, carlyai said:

Thanks for the replies. As I was not sure if I could find a shop selling rust converter after a 200 km trip, I decided to give it a miss this time and rubbed back to bare metal and coated the spots with red oxide paint.

Now you need to finish the job ? Red oxide is a primer and porous, you need to seal with a top coat else the rust will just return.

[carlyai]

Now you need to finish the job [emoji846] Red oxide is a primer and porous, you need to seal with a top coat else the rust will just return.

Hopefully I'll outlive it returning. I've installed a new fuel tank so shouldn't be any more moisture under the tank.

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