I do use phosporic acid and have for years, but it is quite a bit slower
than the muriatic is is quite a bit more expensive. I have tried applying
the phosphoric after the muriatic, but it still wants to rust. I think the
phosphoric I've been getting lately has been diluted more than what I have
had in the past and just doesn't sseem to do the job I am used to.
Thanks for the Brillo tip, didn't know about that one. Since you mention
phosphates, what about a dip in TSP to neutralize/rinse the acid? Diluted
baking soda solution?
Thanks Kevin
At 1:00 AM -0400 4/9/02, Kevin & Kathy Valentine wrote:
>Gerard,
>
>Muriatic Acid is a diluted form of Sulphuric acid. Not the greatet choice
>for derusting. It reduces good metal as fast as it reudces rust and leaves
>no protective coating.
>
>Try Phophoric acid. It will desolve the rust at a faster rate than it
>desolves the good metal. It also produces less fumes and leaves a
>protective coating that lasts for several weeks (preventing rerusting).
>
>You can dip parts in it or brush it on, rinse with water and let air dry.
>
>If you want to continue to use Muriatic, you can treat the metal with
>phosphoric after and it will not rerust for a couple of weeks. Or scrub the
>part with brillo after you have "cleaned it". The soap in Brillo contains
>phosphates which prevent rerusting (a very weak form of phophoric acid).
>
>Kevin V.
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