[Shop-talk] rust removal follow up

[Donald H Locker]

[Comcast changed its mail interface so this may not work at all. Here's hoping; I think gmail sucks but Comcast really sucks worse now so maybe I'll change.]

Ethylene Glycol Monobutyl Ether is a surfactant (one of the butyl cellosolve types) whose purpose is to penetrate oils from fingerprints and such on the part. Chromium trioxide is an oxidiser; not certain why it is in there, but it may also be for oil lifting/penetration.

Donald.


> On October 1, 2017 at 7:38 PM Jim Stone <1789alpine at gmail.com> wrote:
> 
>     Interesting. Glad it worked.  It is always good to have additional options!  I was curious about this vs. the Prep and Etch that I recommended and looked up both safety data sheets.  P&E is just Phosphoric Acid, listed at 35-45% concentration.  Must for Rust also contains  Phosphoric Acid (20%), along with Ethylene Glycol Monobutyl Ether and Chromium Trioxide (1% each).  Does anyone here know what the two other chemicals do?
> 
>     Jim
> 
> 
>         > >         On Sep 30, 2017, at 10:12 AM, john niolon <jniolon at att.net mailto:jniolon at att.net > wrote:
> > 
> >         Found a product from “Krud Kutter” called ‘a must for rust’   About a 8 oz bottle for about 6 bucks
> >         dumped it into a plastic container and loaded the carriage bolts,nuts and washers... left it in solution for
> >         about 2 hours then took them out.... clean as a whistle.  Rinsed with water (per instructions) and dried, then
> >         coated with wd-40...  Looked like new. 
> >          
> >         +1 for Krud Kutter... a good inexpensive solution... also comes in spray bottle and gallon containers
> >          
> >         thanks for all the suggestions, guys
> >          
> >         john
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> >     > 
> 
 

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