Re: Chain Waxing, hot, Why it Works?

41 wrote:
Peter Cole wrote:

Michael Press wrote:

41 wrote:


Have you
ever rubbed paraffin, better, under som e pressure, whether between
fingers or between links? It is not slippery.


Paste floor wax -- the old-fashioned kind. What's in it? Wax and
solvents usually.


Old fashioned paste floor wax, like good automobile wax, relies on
carnuba (carnauba) wax, the hardest and highest melting point natural
wax. It is both chemically and physically very different from paraffin:
chemically from a different family, and something like 10x as hard as
paraffin. Not sure how it would work on a chain- the load must still be
too high even for it (?)- but that is not what has been talked about in
this thread.

I was rebutting the claim that waxed floors aren't slippery, not the specific contents of floor wax. I can find no information for the specific formulation of any paste floor wax. Do you have some, or are you just speculating?


Wax sticks well to plastic, and because it's hydrophobic will displace
the water film between the board and skin.


Try reigning in the speculation a bit. If what you say were true, then
to dry the soles of my feet, I need only step on a paraffined board. Of
course that does not happen.

Of course it does. Try rubbing a wax of your choice under water, it won't be slippery. If the water film remained it would be.


Wax has high film strength, that's what makes it prevent floor scuffs.


Carnuba is indeed very strong (strong enough for a bicycle chain? I
doubt it but don't know). However, paraffin is not. Paraffin is also
very brittle.


From:
<http://materials.globalspec.com/LearnMore/Materials_Chemicals_Adhesives/Industrial_Oils_Fluids/Solid_Dry_Film_Lubricants>

" Solid and dry film lubricants vary widely in terms of chemical
composition. Some products contain boron nitride (BN) or "white
graphite", a chemically inert compound that provides high thermal
conductivity and low thermal expansion. Hexagonal or flake graphite,
molybdenum, and metal sulphide are solid lubricants that maintain a low
coefficient of friction up to 400° C (752° F) and are available in
powder, sprayable coating, and solid machinable forms. Products that are
based on halogenated hydrocarbons include chlorof luorcarbon (CFC),
halogenated fluorocarbon (HFC), halogenated chlorofluorocarbon (HCFC),
and perfluorocarbon (PFC). **Wax, paraffin and stearate compounds are
suitable for some lubrication, anti-corrosive and anti-static
applications**. Fluoropolymer-based compounds include
polytetrafluoroethylene (PTFE)."


Hold on. You are using this quote to support the claim that paraffin
has a high film strength and low coefficient of friction? That's not
what this paragraph says, which only incidentally mentions paraffin and
says it is suitable for SOME lubrication. Since I use ski wax, I
certainly agree with that. However, in this thread we are talking about
BICYCLE CHAINS, and in our context, paraffin is not a lubricant. This
was proved in the IHPVA paper referenced earlier.

I'm sure there are many papers describing the use of wax lubricants in industrial applications, here's one I found quickly:

<http://www.hitachi-pm.co.jp/english/seihin/tec-report/2002/pdf/tec2002_e_05.pdf>

Sliding Property of Fe-Cu-C Sintered Materials under High
Contact Stress and at Low Sliding Velocity

"If wax is used as lubricant for impregnation instead of oil, the
durability of the bearing can be increased, because wax has a stronger film intensity and about
2.7 times as large a coefficient of thermal expansion as that of lubricating oil."


You never used waxed dental floss?


Not the same application: presence of moisture does make paraffin
slippery, as I stated explicitly in an earlier post:

#Waxes are instead highly hydrophobic, and this and perhaps related
#properties account for their use to improve glide against H20 (ski
#waxes et cetera).

You think waxed floss wouldn't make a difference on dry teeth? I beg to differ. You've obviously not done much hand sewing where bee's wax is used to lubricate the thread. No water there.
.

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