Rusty nuts

[Doug Gould]

This was posted on the Montreal forum. Its a little interesting.

Doug





Subject: If you have rusty nuts!

Machinist's Workshop magazine actually tested penetrants for
break out torque on rusted nuts.

Significant results! They are below, as forwarded by an ex-student
and professional machinist, Bud Baker.

Don't forget the April 2007 "Machinist's Workshop" magazine
comparison test.

They arranged a subjective test of all the popular penetrants with
the control being the torque required to remove the nut from a
"scientifically rusted" environment.

Penetrating oil ..... Average load
None ...................... 516 pounds

WD-40 .................... 238 pounds

PB Blaster .............. 214 pounds

Liquid Wrench ........ 127 pounds

Kano Kroil ............... 106 pounds

ATF-Acetone mix.......53 pounds

The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic
transmission fluid and acetone.

Note the "home brew" was better than any commercial product in
this one particular test.

Our local machinist group mixed up a batch and we all now use it
with equally good results.

Note also that "Liquid Wrench" is about as good as "Kroil" for
about 20% of the price.

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Messages in this topic (3)
4b. Re: Fw: Rust Penetrant Test
Posted by: "Bruce Taylor" bruce.taylor@cern.ch   alfamontreal
Mon Jun 29, 2009 2:08 pm (PDT)


Interesting, Tom! Acetone is a very useful solvent, but it evaporates rapidly. Is that why they mixed it with ATF, which is more viscous than most penetrating oils? For how long did they leave the products to soak?

Ciao!

Bruce

On Jun 29, 2009, at 9:36 PM, X wrote:

> Bruce, the following information might be useful to anyone
> encountering rusty screws, nuts, and bolts during a restoration or
> repair. Presumably some of the brands tested are available in
> Europe and elsewhere (besides the U.S.), and the "best" penetrant
> certainly is!
>
> Tom Sanor
>
>
> Subject: If you have rusty nuts!
>
> Machinist's Workshop magazine actually tested penetrants for
> break out torque on rusted nuts.
>
> Significant results! They are below, as forwarded by an ex-student
> and professional machinist, Bud Baker.
>
> Don't forget the April 2007 "Machinist's Workshop" magazine
> comparison test.
>
> They arranged a subjective test of all the popular penetrants with
> the control being the torque required to remove the nut from a
> "scientifically rusted" environment.
>
> Penetrating oil ..... Average load
> None ...................... 516 pounds
>
> WD-40 .................... 238 pounds
>
> PB Blaster .............. 214 pounds
>
> Liquid Wrench ........ 127 pounds
>
> Kano Kroil ............... 106 pounds
>
> ATF-Acetone mix.......53 pounds
>
> The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic
> transmission fluid and acetone.
>
> Note the "home brew" was better than any commercial product in
> this one particular test.
>
> Our local machinist group mixed up a batch and we all now use it
> with equally good results.
>
> Note also that "Liquid Wrench" is about as good as "Kroil" for
> about 20% of the price.