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

[aankrom]

I think what I was calling "gibsonizing" is actually parkerizing. I 
don't know where the hell I got the the word "gibsonzing." Maybe Gibson 
was the name of the guy who wrote the article in the biker magazine I 
was reading. (I like Indians.)

AA

On Thu, 22 Dec 2011 17:40:13 -0500, aankrom 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. I suppose it's a combination of
> the the toilet bowl cleaner being lousy at its job and the fact that
> phosphoric acid can contribute to algal blooms and such. So I
> rediscovered Naval Jelly and the hassles that come with it. It works
> fine on bare metal rusty surfaces. But it eats paint and sometimes
> leaves this residue that's as much of a pain to get off as the rust. 
> I
> should try pouring a glob into a tub of water and try my galvanized
> chassis soak. Maybe diluting it is the answer.
> The effect phosphoric acid has on galvanized steel is similar to a
> technique to treat metals on motorcycles and such called 
> "Gibsonizing"
> but try to Google THAT and get hits pertaining rust-removal. 
> Seriously
> - even you try gibsonizing+rust+zinc, etc.
>
> I was wondering if anyone else had some tips for products that remove
> rust. Ones that are stronger than citric acid. Something like Naval
> Jelly is a plus.
>
> Anthony
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