How to Make Glock Barrel Black Again

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1. I was told this evening that the barrel of a Glock pistol is Tennifer (sp?) coated/plated inside and outside? Is this true? Searching the cyberspace is not turning upwards much. I was also told that this Tennifer blanket/plating tin can flake off or be released past the metal creating the appearance of pits. Any input there? The pistol in question is a third gen forty if that matters.

   I know Tennifer is tough, I had a G17 that I trounce the crap out of for years and it help up tremendously well. I am non sure about what I was told tonight however.

   Anyone have a phone number and a contact at Glock that I could talk to direct?

2. 

   Gilmore Member

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   Information technology isn`t any kind of plating, information technology has had a chemical treatment that basically case hardens the surface of the steel. I don`t believe it is used on the inside of the barrel but the surface of it and the slide. Nothing to bit off, but a very hard surface of the existing steel.

3. The entire butt and slide are tenifered, both inside and out.

4. Tennifer isn't a coating it's a treatment to the metal. The black color of the slide(!) is parkerizing. The parkerizing might wearable off, merely the handling of the metal goes a few mils below the surface. The barrels are treated as well, but not parkerized. That is why they terminal so long and is besides why they employ the polyagonal rifleing. The tennifer treatment makes the metal nearly as tough as a diamond on the Rockwell Hardness Scale and I accept heard (not seen mind you) that some people sharpen theor knives on the slides.

   SC

   Last edited: May 28, 2003

5. HeHe, umm, the black coloring on the frame is plastic, but I know what you meant

   Tenifer is a dumb sounding trade proper noun for nitro-carburizing. Cipher plated on, but the surface layer of the barrel and slide are chemically converted in this process to something harder than woodpecker lips. If you see pits you figured out how to corrode your bore, not good.

7. I saw a Glock 9mm barrel that definitely had pits in the corners of the grooves despite looking unfired. I ever wondered about that.

8. It's apparently not Parkerizing. Information technology's black oxide that is washed as role of the nitro-carburizing process.

   Tennifer is i of the most corrosion resistant finishes. I say again; RESISTANT. Abuse anything and it will corrode - stainless, chrome, whatever.

9. The black finish has nix at all to do with the tenifer process.

10. And so you saw an aftermarket barrel. Glock 9mm barrels don't have grooves since they apply polygonal rifling.

    For the people talking about "frosted" bores, or bores showing some sort of odd "lines" or what sometimes appears to be hairline cracks in the bores of Glock barrels... That's common in Glocks that have only had a few hundred rounds through them. It disappears with more shooting and doesn't affect role or accuracy.

    IIRC, the surface of "tenifered" steel is harder than chrome, and more corrosion resistant than any of the stainless alloys used in guns. It'due south a pretty astonishing treatment. About as shut to truly corrosion proof as steel can get.

11. John, it was a Glock bbl. I chosen information technology grooves for lack of a amend term. Glock 9mm with the serial # of the gun on it.

    Perchance your second comment addresses what these imperfections were. Thanks.

12. Alright Nero,

    Where does that shiny black surface on the barrel come from?

13. 

    Owen Moderator Emeritus

    Tenifer is more widely known every bit QPQ. Handy is close, it is not nitro-carburizing, but carbo-nitriding (co-ordinate the the lit I have on my desk, correct in front of me). Depending on the substrate, is is somehwere betwixt lx and 75 Rc. It is not a coating at all, merely a oestrus treating procedure. The blackness is introduced during the finishing process.

    It works bacsically the aforementioned as carburizing. Nitrogen is infused into the surface of the metal, disturbing the grain structure. It also lowers the core hardness of the slide, which is a practiced thing.

    Tough parts are like Yard&Chiliad'due south, crunchy on the outside, and squishy on the inside.

    The slides are heated to, well, very warm (1100 deg F or so), quenched, polished (which removes the color) and quenched again (to replace the color). Quench Smooth Quench = QPQ =Tenifer = Melonite.

14. From http://world wide web.f-r-i.com/glock/misc/overview.htm

    ----

    The Tenifer-treated slide and barrel

    Glock barrels and slides are made from quality steel which has been treated with a special "Tenifer" process. This colorless carbo-nitrate formula enriches the steel with oxygen, sealing its pores. Tenifer makes the steel extremely difficult (as hard as industrial diamond on the Rockwell scale) and corrosion resistant. The steel will not scratch or rust, period! In fact, the slide is so difficult you can employ information technology to sharpen your knives.

    The barrel is treated both within and out. Because of this, Glock barrels exercise not show the normal wearable associated with untreated barrels by other manufacturers. Glock, Inc., has one barrel which has fired 1 meg rounds and still works; another has fired 300,000 rounds and however shoots better than 1½" groups!

    Glock also parkerizes the slide and barrel to give them a matte black color. While the parkerizing might wear off showing "bare" steel beneath, the Tenifer is nonetheless there. In fact, it penetrates the steel to a depth of three microns. Even a Glock which has lost all of its matte black stop is still scratch- and rust-proof.

15. as far as rifling goes, I have read that NYPD ordered Glocks with conventional rifling and then that they tin ballistic impress them better, and an armourer friend told me that the Austrian consequence Glocks actually have conventional rifling to allow the firing of lead bullets but in case.

16. The butt is not Parkerized! If you have ever seen Parkerizing, you would realize that the very dark, shiny polish stop on the barrel tin can not be that.

    Similar Owen said, information technology's done on the tail end of the heat treatment process, which I'm pretty sure is iron oxide.

    The black part does not take to be role of the process (Witness "Wunderfinish"), but is included in the Glock, HK and probably South&West processes.

17. correction to my previous postal service

    My armourer friend actually told me that German language armed forces guns are conventionally rifled instead of polygonal, not Austrian.

18. Tennifer is a common salt-nitride procedure used to harden the surface of steel (.69RC) and to provide superiour corrossion resistance.

    Older Glock slides were then finished with a blazon of parkerizing. The newer (G3) ones take some kind of shiny teflon stop. The finish is for cosmetic reasons and it will burnish, at least the parkerized ones will. Haven't had the teflon finished one long enough to know how it will hold upwards.

    The butt has some kind of finish on the outside, looks similar teflon, but the inside of the butt is just tennifer treated steel. Tennifer treated steel is a dull dark gray in color.

    Expect at the feed ramp of a glock and the metal inserts in the frame. That is what tennifer treated steel looks similar.

    Tennifer process:

    iv. Nitriding and Nitrocarburising
    In nitriding, nitrogen is diffused into the surface of steel components by heating them to about 520oC in an temper of ammonia or exposing them to a depression force per unit area nitrogen + hydrogen atmosphere while they are subjected to a glow belch. To obtain a high surface hardness (above 750 HV) elements that form hard nitrides, eg Al, Cr, Mo, V, must exist nowadays in the steel.

    Due to the lower temperature than that used for carburising, the process times are much longer (twenty + hours) and this gene combined with the fact that at that place is no quench ways that danger of baloney is greatly reduced.

    Nitrocarburising is a variation on nitriding, normally carried out betwixt 570 and 585oC in either a molten salt bath or gaseous temper. A treatment fourth dimension of 90 - 120 minutes gives a shallow layer, virtually twenty micro m, and although this is not particularly hard, information technology provides splendid clothing and fatigue resistance.

    There are a number of proprietary processes: Tufftride, Tennifer, Nitrotec. In some variations sulphides are added to the salt bath, giving even better wear resistance. Two processes are Sulfinuz and Sursulf.

19. The latest Glocks don't have a phosphate cease on the slides. It'southward more than like a teflon like on not-stick pans. The new finish resists holster clothing ameliorate. The barrels are blued just like the other posters said the slides and barrels are first tenifer treated before being finished.

    The bores of new Glocks accept residue from the tenifer treatment. It takes a few hundred rounds and cleaning with bore solvent to remove the residue.

20. 

    mete Member

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    At that place are some strange definitions here. If you do a search on 'Tennifer' you will notice ( mostly in german) that it is a trade name for a gas carbonitriding process . This puts both carbon and nitrogen into the steel within a few thousandths from the surface. This results in a hard clothing resistant surface and a tough core when the steel is hardened. Later this is done the the steel may be given various surface treatments such as Parkerizing ( manganese phosphate) , teflon coating etc. The process does not "add oxygen" nor "disturbe the grain" nor volition it "flake off". The basic process is many years one-time. But the metallurgical facts!!!

21. I submit over again that the black color on the barrel, and slide, come from the a step in the Tennifer process.

    The butt is too smooth to be parkerized, but can not possibly be blued either, due to the fact that bluing IS rust, and Tennifer doesn't rust! The inside of the barrels are also black, not the light silver of Witness nitraded guns. Also, anyone who'south dealt with coatings would realize that a coating wouldn't last on the Glock barrel more than than ii cycles, and it wears much longer than that.

    So if someone could explain how a rust proof butt ends up with a shiny black finish that is that wear resistant and information technology Not being function of the Tennifer procedure, I'd love to hear it.

22. Handy, you tin submit for grand more than times, and you'll be equally incorrect for 1000 more times.

23. The black finish on a Glock has absolutely Aught to do with the tenifer process. It is a black phosphate finish. If y'all don't belileve me call Glock and ask them yourself. 770-432-1202 Also check out www.glocktalk.com for more good glock info.

24. Quote: The black finish on a Glock has absolutely NOTHING to exercise with the tenifer process. It is a black phosphate stop. If yous don't belileve me telephone call Glock and ask them yourself. 770-432-1202 Also check out www.glocktalk.com for more than good glock info.

    This is absolutely correct!

25. So, what is the BARREL finished in? Shoe polish?

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