פעם היה לי שמן לשרשרת של אופנוע שטח מתוצרת מוטול ,הוא לא גרם זנק לגומיות שבשרשרת (O RING) והיה לו כושר הידבקות טוב ,אולי הוא יתאים גם למסוק
להלן מאמר המפרט את תכולת ה WD-40 אשמח לקבל ממך הסבר מאיר עיניים אלו מהמרכיבים המפורטים הם דטרגנטים
Newsgroups: sci.chem
From: B.Hamilton@irl.cri.nz (Bruce Hamilton)
Subject: Re: WD 40 Ingredients
Date: Thu, 12 Jun 1997 15:41:41 +12
In article <5n9c5h$5vt@freenet-news.carleton.ca>
ca805@FreeNet.Carleton.CA (Everett J. Harriman) writes:
...
>Does anyone know the composition of the product, "WD 40"? I'm
>especially interested in identifying the ingredient used to give
>the penetrating property to WD 40.
The WD stands for Water Displacing. I haven't analysed it,
( not commonly sold here ) but somebody ( Professor Toraki? )
squirted some down a GC/MS and confirmed the solvent was
boiling around 150-200C and only contained a minor % of
aromatics, which means it is either a narrow boiling range
kerosine fraction, or a special narrow boiling range solvent
like low aromatics white spirits.
I've analysed a similar product, and it was around 80%
kerosine, 10% acidless tallow oil, and 10% lubricating
oil light base gade - with some additional antioxidants
added to improve durability. When the composition of
WD-40 last came up in sci.chem, I wasn't sure if it was a
water displacing solvent only, but subsequently there
has been a long discussion about the film left behind in
some rec.* groups - which is why it should not be used as
a lubricant, the film is only a temporary corrosion protective
layer.
That would make WD-40 like the formulation above.
The kerosine is the solvent, the tallow oil and lubricating
base grade provide the means for the fluid to displace
water from surfaces and, when the kerosine has evaporated,
leave a thin, protective film on the surface that provides
temporary corrision protection. It is possible that it may
have some solid lubricant in it ( PTFE,Graphite,MoS2 ),
but I suspect there would not be enough to provide any
useful lubrication - and thus should not be used to wash
"proper lubricants" off bearing surfaces, chains etc..
Note that the light lubricant base grade is just the vacuum
distilled, high boiling, hydrocarbon fraction used in light
lubricants, but has minimal lubrication properties ( until all
the Extreme Pressure and other compounds are added ) other
than those conferred by the viscosity. It is not a "lubricant",
just a base grade.
So, in summary, it is a water-displacing formulation which
deposits a film that provides temporary corrosion protection
( temporary usually means days to months, depending on the
environment). The 40 is supposed to mean that it was the
40th formulation evaluated - not certain if true or not.
Bruce Hamilton
הנה אנליזה של ה WD-40 עם Gas Chromatograph
http://www.wired.com/science/discove...st_whatsinside