500F-600F is often all that is needed and the parts can be done over and over again you just have to clean between each attempt. Hot blueing salts attack soft solders on guns, so it isnt to be done on old shotguns and some older rifles. Its a pretty straightforward process. Before you start, it might do you well to mark the sight base on each side of the dovetail with a Sharpie marker, so you can see when the sight begins to move. | Alpha Detroit", "NRA Family | Gun Manufacturing: Browning vs. Bluing", http://mypeculiarnature.blogspot.com/2014/08/quick-rust-bluing-back-in-black.html, "Radio Kits and Designs for Old and New Styles", "Coating, Oxide, Black, for Ferrous Metals (MIL-DTL-13924D)", "Phosphate and black oxide coating of ferrous metals (MIL-HDBK-205A)", https://en.wikipedia.org/w/index.php?title=Bluing_(steel)&oldid=1142351288, Short description is different from Wikidata, Articles that may contain original research from October 2020, All articles that may contain original research, Articles needing additional references from October 2020, All articles needing additional references, Articles lacking in-text citations from September 2014, Articles with multiple maintenance issues, Articles with dead external links from July 2017, Articles with permanently dead external links, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 1 March 2023, at 22:58. The thickness of the oxide is a function of how hot you heat the steel (The color is due to interference of light reflecting from the surface of the oxide coating, and light reflecting from the oxide-steel interface). It will instantly vaporize into steam and splash all over you. Cooking off the more volatile hydrocarbons leaving the heavier ones produces a different effect yet again. Mess. For this Instructable I'm using thread cutting oil. New guns are typically available in blued finish options offered as the least-expensive finish, and this finish is also the least effective at providing rust resistance, relative to other finishes such as Parkerizing or hard chrome plating or nitriding processes like Tenifer. *Potassium Nitrate is an oxidizer. Work on a metal or steel surface, such as an anvil, to avoid any fire hazards. You can then u. se a soft brush to gently remove all the residue of the cleaning solution on the components. For the chemical, the bluing solution should be either Oxynate No. In comparison, rust, the red oxide of iron (Fe2O3), undergoes an extremely large volume change upon hydration; as a result, the oxide easily flakes off, causing the typical reddish rusting away of iron. Old school smiths use something called washing soda to strip oil off guns. Dont leave cold blue solutions around anywhere pets or kids could get at them. You work on nice guns! Then remove it from the degreaser, don't be tempted to wipe it off with anything. Then the crucibles would be removed from the furnace and placed over boiling hot water and air would be bubbled through the water and the parts would be dropped into the water. Large scale industrial hot bluing is often performed using a bluing furnace. However, oil may spill and create a fire hazard if the steel is put into the oil too quickly. "dateModified": "2022-03-27", When youre done, attach the thermometer to the tank and fire up the burner. "keywords": ["how to blue stainless steel"], it takes a long time to heat up a long (ie barreled action length) tank that is, oh, three barrels wide. If you have very light, fine pitting, you can polish this out. And for the next (after the next) installment, how to do hard case coloring. The parts are then oiled and allowed to stand overnight. By using our site, you agree to our. Just take them from the comments he posts. Enjoy! The name of the process actually comes from the blue-black appearance of the black iron oxide. gas coverage is another big one. The process was to coat the gun parts in an acid solution, let the parts rust uniformly, then immerse the parts in boiling water to convert the red oxide Fe2O3 to black oxide Fe3O4, which forms a more protective, stable coating than the red oxide; the boiling water also removes any remaining residue from the applied acid solution (often nitric acid and hydrochloric acid diluted in water). My dad keeps his in a big safe with large desiccant packs that he threw in there. "name": "Shooting Mystery", Heating up a tank on the kitchen stove. You dont want to affect the hardness of your steel in critical areas like actions, bolts, bolt lugs, barrels, chambers, etc. "@type": "ImageObject", After the Civil War they switched to another process. Now securely hold your piece with whatever you have chosen. 3. Now you can start.Apply heat to your object and heat up gently and equally. As I'm bluing round pieces I slowly and evenly rotate the piece over But the article was very informative. I pulled the temp off the top of my head. Even a fingerprint will affect the consistency of the colour. Still, you will find that cold blues dont last. Add 5 lbs of regular table salt to the water. For modern uses of black oxide, see, Learn how and when to remove these template messages, Learn how and when to remove this template message, "How To Remove Rust From A Gun Without Damaging Bluing? But since this was my first project, with an inexpensive kit as a learning tool, and as I intend to do this again with a much more expensive kit, my trials and errors and your voice of experience will be very useful the next time around. Isn't the point of the acetone to degrease, why would i grease? occasionally I'll buff it afterwards. Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. Pour in some acetone, and while wearing rubber gloves (dishwashing gloves are OK), put in a pad of 0000 steel wool, swish it around and pull it out. If the sights need to be stripped & blued, follow the same procedure, but dont polish on them. They melt at, oh, somewhere about 280F. You should note that the blue layer is rather delicate so dont treat it roughly. Why do you bother with all this crap?. The plate turned blue just like you ible and I was told this was an effect of compression fitting.the rod didn't change colour even though it had the heat applied to it so was it actually the compression fit that changed the plates colour. In order to confirm the bank transfer, you will need to upload a receipt or take a screenshot of your transfer within 1 day from your payment date. After (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! Step 3: Suspend the components in the bluing solution tank, However, if the bluing effect isnt satisfactory, then you can try giving the components an acid bath (using, Step 4: Rinse the components in a cold water tank then transfer them to a hot one, Step 5: Submerge the components in a tank filled with water displacing oil, Address: 4455 Camp Bowie Blvd, Ste 114 #852, Fort Worth, TX 76107. Keep posting like this. In literally 10 seconds on a buffing wheel incorrectly applied, I could screw that up to a point where it might take be eight+ hours of hand polishing to recover my prior results. Do NOT wipe/touch your metal with anything after degreasing as the whole purpose of cleaning was then for nothing. Apply heat to your object and heat up gently and equally. the cost of all the tanks you need for rinse & boil-out Thanks for the lesson, DG. By signing up you are agreeing to receive emails according to our privacy policy. This finish allows them to be stored in high-moisture conditions, like sports bags, without rusting. of the steel than do not even try this on something that is anything other than artistic in nature! Youll want to clamp on the barrel directly under the sight youre about to drift out. Youre just using stump remover to do it. It takes practice. I used Brownells Plum Brown, a product that requires that the barrel be heated to 275 degrees to activate the reaction. For the final step, we let the components cool down in water displacing oil. I thought there was something that could help improve the colors but wasnt sure until I came across this. Most cold blueing agents contain some selenium dioxide in them to enable to them to react at room temps. Vegetable oil has a higher boiling point, so the hot steel will take longer to cool and reduce the chance of it cracking. There is something really rewarding about this technique. Also Dont get the 275-300F bath on you. They should start gassing up approximately 2 to 3 minutes after exposure. You need to adjust the boiling point of the salts for your altitude. "https://twitter.com/Shoot1ngMystery", Bluing is also used in seasoning cast-iron cookware, to render it relatively rust-proof and non-stick. This article was very, "I've been working with steel since I was a child, and reviewing these proper methods and skills makes my projects, "It surely educated me on several points. Dont touch the metal with your bare hands since it could cause severe burns. Trust me, I'm speaking from experience :) ). It is also used by machinists, to protect and beautify tools made for their own use. It, too, must be oiled to provide any significant rust resistance. Great column, and thanks for all the responses to various questions and comments. I rarely use them. Theres a reason why I buy up clapped-out guns and stuff where people look at me with a WTF?! To harden steel, start by heating the metal directly with a blow torch until it turns a cherry red color. I think DGs method is a lot safer than mine. Youll get a dark spot right there. Mix equal parts of cream and liquid Brownells Oxpho Blue. The parts must be observed constantly for colour change. The wire is extremely small in diameter, so you have to take that into consideration. This is an alternative method for creating the black oxide coating. Rinse them in a cold water tank after. We use cookies to make wikiHow great. Add in the 250F+ temperatures of the salts when they hit your skin, and youre both burned thermally and chemically in seconds. For more information on using a blowtorch and protecting the steel, scroll down! However, there are certain characteristics differences between the materials so knowing clearly how to blue stainless steel is really important. Dont. Thanks for always being so willing to share, Sir. "url": "https://shootingmystery.com/wp-content/uploads/2017/01/Shootinglogo.png" You turn up your nose at crap guns? I hope to someday have good knowledge to pass on to people, heh. Fill the tank with a suitable amount of water then add in the bluing salt using the correct ratio. After three coats, washing and drying, the finish was not too bad, considering I was (and am) a rank amateur. All tip submissions are carefully reviewed before being published. How to Blue Bluing Steel Using Oven Or Torch and Oil Method. "https://www.reddit.com/user/theshootingmystery" Wear safety glasses and gloves while working with hot metal. It cannot rust any further. ", steel". Some people might not have a tank long enough to contain a barreled action to boil out. Hes claiming that method is more durable than Blue alone. Rust bluing was developed between hot and cold bluing processes, and was originally used by gunsmiths in the 19th century to blue firearms prior to the development of hot bluing processes. It does provide good rust resistance, which is improved with oil. Usually they would pack the parts in crucibles and surround them with leather, wood, coal,bone etcThey would heat them up to 1200F to 1500F and hold them at this temp. One of the reasons I hand-polish up to 600 and buff only above that is that when you see one of my barrels (by holding it up to a light source, and sighting down the barrel from the muzzle at your eye to the breech out at arms length), you see no dips, waves, ripples, etc. Most waters in the Rockies clear out to the west coast will have high(er) dissolved solids in them. Keep a grade B fire extinguisher nearby in case of a fire. } Always back your paper when youre polishing over edges and up against features. For most of the time, guns that utilize carbon steel components are the prime candidates for bluing but its totally possible to color stainless steel blue as well. All those materials the leather and bone the coal where sources of carbon and other trace elements. DG thank you. Buffing wheels have their purpose, but they take real skill to use without making a mess of guns, starting with the selection of the wheel (theres, oh, at least six types of buffing wheel), choice of type of compound, choice of grit of compound, choice of wheel speed (many buffers have only one speed, and there are some jobs where you really want a 3-phase motor on your buffer with a VFD to adjust the speed down from 1800 or 3600 RPM) and so on. Where/how did you think I got to the point I could make nice guns? Robert Farago is the former publisher of The Truth About Guns (TTAG). http://www.lowes.com/pd_188198-316-HG-66420_0__?productId=4764059 You have to apply the bluing fluid. "sameAs": Heat the gun parts. I am simply trying to learn anything and everything that there is to know about it. Notify me of follow-up comments by email. For this reason, it is considered not to add any appreciable thickness to precisely-machined gun parts. Next wash your piece in your chosen degreaser for a minute or so to get rid of all grease/fingerprints that was on the metal. This article was co-authored by wikiHow staff writer. Use a backing block of wood or even a Pink Pearl rubber eraser. A Pocket Sundial From a Broken Pocket Watch! My advice to people here: Unless youre a professional, and youre working in a shop with all the required safety gear (a cold water shower within a couple feet of the tanks, and an eyewash station next to the tanks, and someone working in the same shop every moment youre working on the salt tanks), DONT. Cold blues will When you add water to a hot salt tank, you get an explosion of steam, and you need to develop some skill in adding the water with a very fine copper pipe on your water hose to prevent steam blow-outs spattering salts all over you. To heat this, I use a Coleman camp stove and a 15# jug of LPG gas. You can also heat the oil to create different effects. You can use a heat gun, a blow dryer, or a torch for this. Youll need some shop rolls, ranging from 180 to 400 grit (typical 4-packs are 180, 240, 320 and 400 grit, in 1, 1.5 or 2. Your 700F temp is too high, IMO. Once it's cooled down, take the object out of the oil and place it on a piece of paper/cloth and let it set for about 20 minutes. It was left in a flannel gun case in the back of a moist closet for 25+ years. ")You're ABSOLUTELY right. In colloquial use, thin coatings of black oxide are often termed 'gun bluing', while heavier coatings are termed 'black oxide'.
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