[Diy_efi] Thermal barrier coatings

[Greg Hermann]

From: "John Stricker" <jstricke at rwisp.com>

Not talking about teflon, per se. As I said, these particular coatings are
teflon IMPREGNATED (guess they expect to have lots of little teflons ??)

The teflon impregnated hard anodizing is pretty amazing stuff. As I
said--RC 70 surface hardness, and about as slippery as greased owl poop.
With that kind of surface hardness, it wears like (literally) dur-iron
(high silicon cast iron) , or even better than that! Which is QUITE a bit
better than Al wears.

At that point who CARES if it sheds oil. Its slippery enough that there
won't be near as much surface heating anyway.

The military uses this particular coating on stuff like night vision
equipment--so that the equipment will shed stuff like swamp mud almost
immediately.

Greg

>To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
>Sent: Tuesday, January 21, 2003 8:38 AM
>Subject: Re: [Diy_efi] Thermal barrier coatings
>>
>> I've heard from several places that Teflon is not the way to go.
>> Teflon repels oil (along with everything else) and it's so slippery that
>> the oil will not stay on it.  Moly disulfide is the second most popular
>> coating, and it retains oil.  Now all of this is from people trying to
>sell
>> me something, of course, and the Teflon advocate folks are quick to
>> point out that if Teflon is THAT slippery what do you care if it sheds
>> the oil?  A good question.  But then again, if Teflon works that well,
>> why not coat everything with it and not run any oil at all??
>>
>> John Stricker
>> ----- Original Message -----
>> From: "Greg Hermann" <bearbvd at mindspring.com>
>> To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
>> Sent: Tuesday, January 21, 2003 8:10 AM
>> Subject: Re: [Diy_efi] Thermal barrier coatings
>>
>> > Among the more interesting coatings I have come acrross are
>> > from Ni-Met Industries (Gary, Ind.)
>> >
>> > They do a teflon impregnated anodizing (RC 70 surface hardness
>> > and _VERY_slippery) which is neat for pistons (skirts, pin bores
>> > and ring grooves).
>> >
>> > Also, a teflon impregnated carbide coating (also very hard and
>> > slick) for brass/bronze/copper alloys which might be pretty
>> > interesting for the ID of valve guides and possibly also for con
>> > rod small end bushings.
>> >
>> > Greg
>
>
>
>
>
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