[TR] Evapo-Rust has the formula changed?

Thu May 21 14:14:29 MDT 2020

That whole business of chelation seems like a red herring, Dave, to mask
what's probably a pretty simple formulation.  I can't see how chelation
would convert rust.  Now a chelating agent might very well be used in the
formula to bind or isolate iron removed during the de-rusting process --
they list a chelating agent on their safety data sheet -- ,but a chemist
wouldn't normally think of chelation and corrosion-reversal as the same
thing.

On Thu, May 21, 2020 at 3:05 PM DAVID MASSEY <dave1massey at cs.com> wrote:

> I have been told that it is a chelate, an organic compound that bonds with
> metal atoms.  Some formulations are used heavy metal detoxification.  I've
> been told that it is non-toxic and you can drink it (I haven't tried).
> I've also been told by one user that he pitches the used solution onto the
> grass with no ill effects.
>
> I've used it with good results but as you say, it doesn't work fast.  Over
> time it will start turning your parts black which, I guess, is an
> indication that it is time to replace it.
>
> Dave
>
>
>
> -----Original Message-----
> From: Don Hiscock <don.hiscock at gmail.com>
> To: bill beecher <notakitcar at yahoo.com>
> Cc: Triumphs <Triumphs at autox.team.net>
> Sent: Thu, May 21, 2020 2:41 pm
> Subject: Re: [TR] Evapo-Rust has the formula changed?
>
> That's the one I use all the time, Bill.  I have some things in an
> Evapo-Rust bath as we speak, in fact.  Check online (Amazon, perhaps) --
> sometimes they have a 3.5-gallon pail with a parts basket strainer for a
> good price.  The stuff isn't cheap, unfortunately.  About $10-15/gallon is
> a decent price.
>
> Some people initially think Evapo-Rust is like naval jelly or one of the
> many other phosphoric acid-based rust treatments, a brush-on/spray on
> system.  It's not.  It's a dilute, gentle amber watery fluid in which parts
> are immersed in for anywhere from hours to days.  It works for a while
> until it gets black and exhausted, whereupon it's pitched for fresh.  The
> black stuff, as best the chemist in me can guess, is reduced iron as the
> oxide has electrons donated to it by Evapo-Rust converting it to elemental
> iron or a sulfide.  I'm guessing Evapo-Rust is a reducing agent, an
> electron donor, not an acid like naval jelly, vinegar, muriatic acid,
> citric acid or the other "etching" systems commonly used.  (There's a
> chance, I guess, that it's some sort of buffered acid.  I don't think so,
> but I need to beg/borrow/steal some analytical time from friends to see
> what we can measure.)
>
> On Thu, May 21, 2020 at 2:07 PM bill beecher <notakitcar at yahoo.com> wrote:
>
> Is it this one, or the gel?
>
>
>
> Serenity Now......
>
> On May 21, 2020, at 12:58 PM, Don Hiscock <don.hiscock at gmail.com> wrote:
>
> 
> There are two suppliers of Evapo-Rust, due to some weird licensing I've
> never figured out.  There's "real" Evapo-Rust in the silver-gray container
> from Harris International Labs, and there's "licensed" Evapo-Rust from
> Orison Marketing.
>
> It may be arbitrary and non-technical, but I will only use silver-gray
> "real" Evapo-Rust now.  I think it works better.  Which one are you
> referring to, Sujit?
>
> For those who don't know the stuff, here's some recent fun I had with some
> old spark plugs left in a workbench drawer by the previous owners of my
> house twenty-plus years ago.  These plugs are older than that.  Before and
> after Evapo-Rust shown.
> https://photos.smugmug.com/photos/i-dZHgWFf/0/b8d9aad5/X5/i-dZHgWFf-X5.jpg
> https://photos.smugmug.com/photos/i-GRnjRNV/0/977f00be/X5/i-GRnjRNV-X5.jpg
>
> Here's the hose clamp from the original heater on my TR3B before and after
> Evapo-Rust.
> https://photos.smugmug.com/photos/i-JsZ3sbQ/0/fff5f613/X5/i-JsZ3sbQ-X5.jpg
> https://photos.smugmug.com/photos/i-ZJtx4z7/0/4d9f81b5/X5/i-ZJtx4z7-X5.jpg
>
>
>
> On Thu, May 21, 2020 at 12:39 PM Sujit Roy <triumphstag at gmail.com> wrote:
>
> I like this and have been using it for a few years now. but have noticed
> the new batch is a different color, more clear, and appears more liquidy.
> It seems to wok but seems to go black quicker.
>
> Anyone folks using this stuff noticed similar observations? Do I need to
> find something else?
>
> Sujit
>
> --
> Sujit Roy
> Cupertino, California
>
> https://triumphstagblog.wordpress.com/
>
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