Re: Caught in rain

On Wed, 7 May 2025 19:46:09 -0500, AMuzi <am@yellowjersey.org> wrote:

On 5/7/2025 6:49 PM, Jeff Liebermann wrote:

On Wed, 7 May 2025 07:24:50 -0400, Zen Cycle <funkmaster@hotmail.com>
wrote:
 

I rinse mine for a few minutes in a coffee can with brake cleaner
(https://www.grainger.com/product/CRC-Brake-Cleaner-Solvent-35WT64)

 
Almost pure dry cleaning solvent:
 
<https://www.grainger.com/sds/pdf/259633.pdf>
   Chemical name:  tetrachloroethylene
   Common name and synonyms:  perchloroethylene
   CAS number:  127-18-4
   %  90 - 100%
 
"EPA Proposes Ban on All Consumer and Many Commercial Uses of
Perchloroethylene to Protect Public Health"
<https://www.epa.gov/newsreleases/epa-proposes-ban-all-consumer-and-many-commercial-uses-perchloroethylene-protect>
 
"Risk Management for Perchloroethylene (PCE)"  (Dec 2024)
<https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-management-perchloroethylene-pce>
"EPA has set a 10-year phaseout for the use of PCE in dry cleaning to
eliminate the risk to people who work or spend considerable time at
dry cleaning facilities."
 

>
We used trichloroethane for cleaning for years, small drums
to fill Milwaukee Sprayers:

Please be careful with the chemical names.  The chemical Zen Cycle
uses is tetrachloroethylene.  The chemical that you're talking about
is trichloroethylene, which is a very different chemical.

From 1971 to 1973, I spent some time on a PCB (printed circuit board)
and hybrid IC (integrated circuit) soldering production line.  We
would wash off the rosin flux with trichloroethylene (and
trichlorethane) with no gloves and breathing protection.  In about
1995, we had a reunion and compared notes.  We discovered that nearly
everyone that had worked on the production line had some form of liver
damage.  I was the only one who didn't have liver damage, possibly
because I spent less time near the soldering machines.

https://sureshotsprayer.com/products/model-a-sprayer-a1102
>
Which brings a good question:
https://ecolink.com/info/trichloroethylene-vs-trichloroethane/
>
Trichloroethane is excellent for cleaning and as a bonus it
won't burn. Not readily at least.  Our vendor said it was
discontinued due to regulation years ago.
>
Since government intervention, we now use brake cleaner.
Typically:
>
https://zep.com/products/zep-brake-wash-non-chlorinated-parts-cleaner-20-gallon-50550?_pos=3&_psq=brake+wash&_ss=e&_v=1.0
>
or
https://shop.advanceautoparts.com/p/carquest-brake-cleaner-brake-parts-cleaner-non-chlorinated-high-voc-quick-evaporation-leaves-no-residue-5-gallon-w5086/10998756-P?selectedStore=1830&searchTerm=brake+cleaner
>
MSDS:
https://www.aapmsds.com/msds.aspx?id=19422969-8f5c-4a99-a2d3-d5ae5bc1233a
>
which is more expensive and a virtual flamethrower in a
sprayer; shoots fire a meter and a half at 100  psi (which
can be seen as entertainment). In regular daily use, brake
cleaner is a fire hazard and attention need be paid to that.

--
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558