POR 15

http://www.imperialrestoration.com/product_images/pormsds.pdf

Naval Jelly

http://www.hardwarestore.com/media/msds/145169.pdf

mcneely

---- John Rodgers <inua@CHARTER.NET> wrote:
>   I have a rust issue to deal with, and just wondering about phosphoric
> acid vs POR 15.
>
>  From Wikipedia ( and my college chemistry so long ago)
>
> Phosphoric acid (From Wikipedia and my college chemistry so long ago):
> Phosphoric acid may be used as a "rust converter", by direct application
> to rusted iron, steel tools, or surfaces. The phosphoric acid converts
> reddish-brown iron(III) oxide, Fe2O3 (rust) to black ferric phosphate,
> FePO4.
>
> "Rust converter" is sometimes a greenish liquid suitable for dipping (in
> the same sort of acid bath as is used for pickling metal), but it is
> more often formulated as a gel, commonly called naval jelly. It is
> sometimes sold under other names, such as "rust remover" or "rust
> killer". As a thick gel, it may be applied to sloping, vertical, or even
> overhead surfaces.
>
> After treatment, the black ferric-phosphate coating can be scrubbed off,
> leaving a fresh metal surface. Multiple applications of phosphoric acid
> may be required to remove all rust. The black phosphate coating can also
> be left in place, where it will provide moderate further corrosion
> resistance (such protection is also provided by the superficially
> similar Parkerizing and blued electrochemical conversion coating
> processes). 8 oz bottle cost's $8 bucks. Covers 20 sq. ft.
>
> POR-15: converts rust, turning black in the process. Doesn't sound much
> different than the Phosphoric acid - but at twice the cost. Don't know
> much more, but that it's popular.
>
> Anyone know more about the differences?
>
> John
>
> --
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com

--
David McNeely