glock 21 question

[hobowh]

I just picked up a 21 with a polished slide first time I'd seen one any thoughts about recoating it?

[kidicarus13]

I have a thought... don't, it looks good polished. Or sell it to me and buy another Glock.

[hobowh]

I might do that, have not seen any around me though al the stores nearby are out[Bang]

[SA Friday]

polishing the slide is more and more common in USPSA Glock guns. I have a few friends that have done this. From what they tell me, the parkerizing is so deep that even after polishing, the corrosion resistance of the parkerizing is still there. If you don't like the bling, just have it re-parkerized. It's fairly cheap to get done.

[hobowh]

anyone know a good place to get it re parkerized?

[GunTroll]

My understanding is that from the factory it is not parkerized. I took a Glock armorer course last year and I believe I was told it is coated with Teflon??? I could be wrong but the course teacher was going on about how you could sharpen your knife on the slide and that is what the Austrian soldiers are told to do if needed. Sounds funny to me and not sure if the instructor was just bs'ing to fill up time. If you want it black and porous like original I would bead blast and blue or bead blast and dura-coat. Parkerizing would be cool too!

[kidicarus13]

My understanding is that from the factory it is not parkerized. I took a Glock armorer course last year and I believe I was told it is coated with Teflon???

Tenifer is a trademarked (http://en.wikipedia.org/wiki/Trademark) name for the end result of a chemical (http://en.wikipedia.org/wiki/Chemical) bath nitriding (http://en.wikipedia.org/wiki/Nitriding) process that embeds nitrogen (http://en.wikipedia.org/wiki/Nitrogen) into an iron (http://en.wikipedia.org/wiki/Iron)-containing alloy (http://en.wikipedia.org/wiki/Alloy) to create a corrosion (http://en.wikipedia.org/wiki/Corrosion)-resistant finish that is a dull grey in color and extremely hard. The generic term for this type of process is carbonitriding (http://en.wikipedia.org/wiki/Carbonitriding). Other trade names for carbonitriding include Melonite, Sursulf, Arcor, Tufftride, and Koline.

Glock (http://en.wikipedia.org/wiki/Glock), an Austrian (http://en.wikipedia.org/wiki/Austria) firearms manufacturer, utilizes this process to protect the slides of the pistols (http://en.wikipedia.org/wiki/Pistols) they manufacture. The Tenifer finish on a Glock is the third and final hardening process. It is 0.05 millimeters thick and produces a 64 Rockwell C (diamond cone) hardness rating (http://en.wikipedia.org/wiki/Rockwell_scale) via a 500 °C nitride bath. The final matte, non-glare finish meets or exceeds stainless steel (http://en.wikipedia.org/wiki/Stainless_steel) specifications, is 85% more corrosion resistant than a hard chrome (http://en.wikipedia.org/wiki/Chrome_plating) finish, and is 99.9% salt-water corrosion resistant. After the Tenifer process, a black Parkerized (http://en.wikipedia.org/wiki/Parkerizing) finish is applied and the slide is protected even if the finish were to wear off. Several other pistols also use this process including the Walther P99 (http://en.wikipedia.org/wiki/Walther_P99) and Steyr M/S (http://en.wikipedia.org/wiki/Steyr_M_Series) series.

[SA Friday]

My bad, you're right, tenifer is what they call their process. My post is still correct, just replace the first parkerizing with tenifer.

[GunTroll]

Thats it! I knew it started with a "T".

[DOC]

That's cool with the bling bling. But if you want the ninja look you will have to get it redone.

[hobowh]

thanks for the info. i think i'll see what i can get in trade, and if i don't get anything then i'll wory about refinishing.

[ColoEnthusiast]

I know this is an older thread, but thought I'd throw this in. The surface hardening process that is used on the Glocks is said to be incredibly hard. The dark color is added later to make them dark and matte.
From what I read, if the surface coating wears off (or is buffed off), the hardened surface would still be intact and fully protect the metal. Impressive stuff!