"Fredxx" wrote in message
...
On 10/03/2021 19:17, Rod Speed wrote:


"Fredxx" wrote in message
...
On 10/03/2021 02:56, Rod Speed wrote:


"Fredxx" wrote in message
...
On 10/03/2021 01:31, Rod Speed wrote:


"Custos Custodum" wrote in message
...
On Thu, 04 Mar 2021 14:05:56 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Jethro_uk wrote:
On Thu, 04 Mar 2021 00:32:54 +0000, Dave Plowman (News) wrote:

Been quite a few scare stories in the press about how E10
petrol -
coming here later this year - will damage many older cars. Much
of it
the usual press ********, after all E5 has been around for
quite some
time, and is known to attack older 'rubber' flexible fuel pipes.
Which
don't last forever anyway. Much of it generalization, but one
specific
was mentioned.
It attacks the solder used on carburetter floats (those made of

brass).
Any comments?

I can remember when unleaded petrol was being phased in, and some
cockwombling fire chief scored weeks of publicity saying it was a
bad
thing as it was more flammable that real petrol.

Which suggests (as always) the 80:20 law still applies, and 80% of
reportage is utter ********.

My feeling too. Or the articles I've read try to simplify things
for us
peasants and invent 'science' that doesn't exist.


This one's a classic of pseudo-scientific misdirection:
https://www.theautochannel.com/news/...r-out-air.html
(Adverts at about 11:20)

One said the ethanol absorbs moisture from air.


It does; it's hygroscopic. But not noticeably so (see above).
However,
you can't separate them again by simple fractional distillation.
https://en.wikipedia.org/wiki/Azeotrope

And that 'condensation'
will attack lead, zinc, brass, copper and of course steel. As well
as
rubber and some plastics.

I believe ethanol will dissolve some plastics (e.g., perspex?)

No it doesn't.

The consensus is that it does, but not to a marked effect with
perspex.

First link I came across:

https://www.eplastics.com/blog/chemi...lic-plexiglass

Which says, with
absolute ethanol G - Little or no damage after 30 days of constant
exposure to the reagent.
ethanol 40% E - 30 days of constant exposure with no damage.
Plastic may even tolerate chemical
for years.

I'm genuinely surprised with your reply, crazing of perspex with
ethanol is well known

How odd that it didnt get a
N - Not recommended for continuous use. Immediate damage may
occur such as severe crazing, cracking, or permeation losses.

and I thought you had a chemical background?

I can read, too.

Do you disagree that where a solvent causes an amorphous polymer to
craze,

Ethanol doesnt with perspex.

this is because the polymer is principally soluble in it?

Perspex isnt with ethanol.

The very link I gave says ethanol does craze acrylic sheet,

No it does not, as I proved with the only relevant quotes from it.

as do numerous other sites. You can live in denial and ignorance.

You are the one doing that with your own link.

What it shows is you're not the chemist you think you are.

You cant even manage to read that table in that link.