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Author: Subject: Nituff® coatings
FrankRizzo
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[*] posted on 2-9-2005 at 19:37
Nituff® coatings


What's the process for treating metals with this type of hardcoat?
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12AX7
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[*] posted on 3-9-2005 at 08:23


Hm, is that nitriding? Not sure, I think it involves plasma in a low pressure chamber.

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FrankRizzo
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[*] posted on 3-9-2005 at 12:58


It's a hard coat anodizing process that impregnates the layer with PTFE and a black dye of some sort.

Rich Wolter offers some star pumps (pyro) with the coating and the stuff is practically unscratchable.
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Cyrus
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[*] posted on 6-9-2005 at 16:09


Is the base metal aluminum? Of course, when that's anodized the final layer has sort of hollow tubules that can be filled with dyes, and then closed off somehow, by boiling them or reacting them with a nickel salt, IIRC. There are plenty of good pages on Al anodizing.

So the black dye seems explainable, although I'm not sure why it's put there. Perhaps the hollow tubules are filled with a product similar to the Du Pont teflon spray mentioned recently in a different thread (about teflon, I think). That would be a cool coating!




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FrankRizzo
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[*] posted on 17-9-2005 at 19:56


Cyrus,

Yes, the base metal has to be Aluminum. I'm familiar anodizing dyes and the process, but this appears to be a more involved procedure. The porous AlO3 layer is somehow impregnated with sintered PTFE.

We can speculate all day based on the description of the final product, but the procedure is a trade secret which I'd like to find out. :-)

http://www.techsavvy.com/industry/file/national/08qxf/nim06....


[Edited on 18-9-2005 by FrankRizzo]
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