Horosolve Rust Remover WARNING

[clockboy]

Recently I have been restoring a Roamer watch movement which had suffered from water ingress. The centre wheel was really badly rusted and although I have a donor part I thought I would try "Horosolve Rust Remover "

Well the instructions suggest 10 mins or longer for badly effected parts. BUT I dipped it in the solution & because of family commitments I completely forgot about it for two days. ANYWAY see pics the centre part of the wheel was completely dissolved gone. I don,t know the formula/chemical in this stuff but it must be very powerful indeed.

AFTER !!!!!!

BEFORE (not the original,this is my donor part)

[Geo]

Fantastic stuff, not a bit of rust to be seen! 

[clockboy]

The wheel is perfect like new!!!

[oldhippy]

It's a case of now you see it, now you don't.

[clockboy]

 

It's a case of now you see it, now you don't.

[JohnR725]

Interesting discovery it might  be a good alternative for alum for removing broken screws from plates..

material safety sheet below  all sorts of interesting cautions. Looks like the main ingredient is phosphoric acid  which is a common rust remover,

 

 

 

https://www.cousinsuk.com/PDF/products/142_R1470, R1471.pdf

[rodabod]

I need to get myself some of that for dissolving screws!

[Deggsie]

Chemically looks similar to alloy wheel cleaner. I bet this is not cheap? If you are looking for a less aggressive solution, very cheap - Coca-Cola contains mild phosphoric acid and the fizz is a goo agitator


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[mcass]

The best luck I have had in removing rust is by soaking parts in black tea. It is very gentle and it works.

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[VWatchie]

For shallow rust I've used vinegar essence (12%) and a brush (rinsing in IPA) with great result. A nice side effect is that it makes brass really shiny.

[Nucejoe]

Same destructive effect, if left in vinegar for long 

 I guess I put up horosolve in same category with vinegar.