Rust removal

[muskrat]

G'day fellas.
I found this recipe on the HD forum.

for each litre of demineralized water mix in 100g of citric acid and 40g Sodium Carbonate. After the reaction of the solution has stopped add about 30ml dish soap as surfactant

The solution will turn more and more black when it gets saturated with rust. If it doesn't remove Rust anymore or takes more than 24h for it the solution is exhausted.

It's totally harmless (except maybe any hazmat that was on the part itself) and can be disposed in the toilet. It has a pH of about 4-4.5 so you don't even have to think about PPE when working with it.

I'll give it a go in the next week or two.
Cheers

[Swarfcut]

    Well the end product has to be Sodium Citrate, School Chemistry acid and base reaction, and the behaviour and characteristics of the solution are identical to that made up from a pack of  deox C powder, marketed by BILT HAMER Laboratories, added to water....... Got me thinking!

 Joking apart, this product does work, so much so that it is advisable to check frequently on its rust removing progress. There may be more rust than you think, and a lot less of the component you put in the bath.

 Swarfy.