BottleBob wrote in news: snipped-for-privacy@earthlink.net:
Cliff wrote:
>>
>> >
>
>> >I'm sure you must realize by now that
>> >an anodized surface is integral with the core of the part/material
>> >and is not simply a coated or plated surface coating.
>>
>> HUH??
>>
>> Don't you understand even simple things?
>
> Cliff:
>
> I guess a little explanation of what an anodized surface IS might > be in
> order.
> ==========================================================
>formatting link
> Anodizing uses controlled electrolytic oxidation to develop an > aluminum
> oxide coating on the surface of an aluminum sheet or finished part.
> The resultant coating is dense, and file-hard. Anodized coatings are
> integral to the substrate: they form by "growing down" into the metal
> (about 1/3) and by superficial deposit (about 2/3).
> ===========================================================
>
> Please note the part where it says: "Anodized coatings are > integral to
> the substrate: they form by "growing down" into the metal..." Pretty
> much what I said above, where you responded with a HUH?? as if it was
> something you had never heard of.
>
>>
>> BTW, Some polymers/paints are no doubt much more scratch
>> "resistant".
>
> How many polymers/paints are as hard as a case hardened steel > surface,
> like hard anodizing can be?
>
>
>> "The Al2O3 coating produced by anodizing is typically 2 micrometers
>> to 25 micrometers thick" at 2 micrometers would yield ~ 500 ohms per
>> square Cm of surface area, right?
>> Get some current flowing ....
>
> You seem to have a problem with the definition of galvanic
> corrosion.
>
>>
>> >NOW let's go
>> >back to the original suggestion made by Steve (paraphrased here),
>> >that an anodized or hard anodized surface would tend to lessen the
>> >chance of galvanic corrosion.
>>
>> To bad that it does not seem to be sold for that specific purpose. >
> Oh?
> =======================================================
>formatting link
> Hard-anodizing is used for technical purposes: against corrosion and
> wear, for electrical insulation,...
> =======================================================
>
> And this one.
>
> =======================================================
>formatting link
> Anodizing substantially increases resistance to corrosion,
> scratching
> and wear, provides insulation, maintains high reflectivity, and
> enhances appearance:
> =======================================================
>
> Please note the parts where it says: "Anodizing substantially > increases
> resistance to corrosion" AND "provides insulation".
>
>
>>
>> He already HAD an Aluminum Oxide surface and IT corroded. It would
>> have AGAIN been oxidized at once ......
>
> Did his parts have an anodized or hard anodized surface?
>
>
>> >> BTW, At APM we had an anodizing shop on the North side ... >> >
>> > Did you ever go inside? Or ask anyone to explain the process >> > and
>> >resulting properties of the anodized surface to you? It seems that
>> >if you HAD you wouldn't have made your original comment.
>>
>> Ummmmm ..... I was the manager of industrial engineering for
>> the place ..... Largest user of CNC machine tools in the SE of the
>> US at the time too .... or so I was told ...
>
> You didn't answer my question: "Did you ever go inside? Or ask > anyone
> to explain the process and resulting properties of the anodized
> surface to you?"
>
>
>> > How do you get the marks from a magic markers off? Or are
>> > you going to
>> >hoard that bit of knowledge, and take it to the grave with you? >>
>> Ask when you need it .
>
> Hoard that knowledge. LOL
>
>
> --
> BottleBob
>formatting link
"Hoard that knowledge. LOL"
It ain't like "The Virus" can post any CNC control knowledge in regards to Haas, FADAL, Yasnac, Bridgeports DX-32, Hurco, EZ Trak, Prototrak, Matsuura, etc., etc. as he has *none*.
It ain't like "The Virus" can post any CAD/CAM knowledge of Gibbs, MasterCAM, SURFCAM, SmartCAM, SolidWorks / CAMWorks, FeatureCAM, DelCAM, EdgeCAM, VX or even BobCAD-CAM as he has *none*.
This explains one reason why "The Virus" *still* can't model your "simple part"... it's been over two months now and he still can't show us jack s*it.
Can you imagine "The Virus" actually trying to machine your "simple part" ?
Apparently not much luck with the free camera he won from the temp agency as we still have seen *none* of his work. Must be hard getting stuff to work on Windows 95.
jon
>