[sdiy] products for rust removal - the joys of phosphoric acid

[Steff]

On 22 December 2011 22:40, aankrom <aankrom at bluemarble.net> wrote:
> I used to able to find this cheap-ass toilet bowl cleaner that used
> phosphoric acid. While being a lousy toilet bowl cleaner, it was a great
> rust remover. Plus I noticed that when I soaked a rust bespeckled galvanized
> chassis, the phosphoric acid would react with the zinc, giving the WHOLE
> chassis this nice battleship-grey finish. You couldn't even tell the rust
> had been there unless it was really pitted. But I can't find it anymore.

FWIW, 10L of 42% phosphoric acid is £40 on UK eBay at the moment, sold
precisely as a rust remover. Given how heavily controlled chemicals
are over here, I'd imagine it's available more or less everywhere.

S