[TR] Evapo-Rust has the formula changed?

[Brad Kahler]

I've been using Evapo-rust a lot lately with great results.  As discussed
it does wear out over time.  However I have also found out that it still
works as a great paint remover even after it stops removing rust.  I've got
3 gallons of the stuff in a container that no longer removes rust and I've
been soaking parts in to remove the paint.  It works phenomenally well.

Brad

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On Thu, May 21, 2020 at 3:42 PM Don Hiscock <don.hiscock at gmail.com> wrote:

> 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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