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\n<\/p><\/div>"}. If your barrel has heavier pitting, now were into filing to remove pitting, and thats something I cant teach people in mere text. This will remove all the traces of the bluing solution and other chemicals. It is generally employed on smaller parts such as pins, screws, sights, etc. 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). ", informative and did not use technical language and concepts that would have left me floundering and none the wiser. I hope to someday have good knowledge to pass on to people, heh. The salts here will be slightly less corrosive (ie, just the pure KNO3, no lye), but at 600F, you have a big physical risk right in front of you. fascinated with blacksmithing, but have not had an income to even get it started. I can keep a Krylon can always handy for touch-ups. While the rod may heat some by conduction, it wouldn't get hot enough to start the color-forming process. Bluing, being a chemical conversion coating, is not as robust against wear and corrosion resistance as plated coatings, and is typically no thicker than 2.5 micrometres (0.0001 inches). DG should receive a stipend for his valuable contributions to TTAG. Either that or the steel wool. The melting point for KNO3 is 633F. The easier of the two methods, hot bluing only requires some degreasing agent, a heating apparatus (a blow torch is perfect for this), and any kind of oil. First, let us go through a couple of bluing concepts that you have to know in order to achieve the desired result. Although the steel parts, such as anOrdains watch hands, are near enough miniscule, each I can't stress how important the degreasing step is! Did you ever find out what oil they were using? Reply I can see my wife walking in and shaking her headabout as vigorously as when I asked if I could use the dishwasher to clean some tools. You need to adjust the boiling point of the salts for your altitude. This is not advisable. Most waters in the Rockies clear out to the west coast will have high(er) dissolved solids in them. RF: Expect a write-up from me on Rust blueing and parkerizing in the next couple of weeks. The differential cooling causes patterns of colors to appear as well as hardening the part. FigureLLC. The higher temperatures of the other processes as well as their caustic nature could weaken the soldered joints and make the gun hazardous to use. Blue Metal Shell 13 in 1 Welding Torch Nozzle Tip Cleaner For Welder Soldering. 2. For the process your metal should be nicely polished for the best results.The more shinier the polish the more your end result will glow. I can' "url": "https://shootingmystery.com/wp-content/uploads/2021/01/How-to-Blue-Stainless-Steel-in-5-Easy-Steps.jpg" Drill bits and gun barrels are common examples. Ive learned a LOT. Thanks for always being so willing to share, Sir. Bluing (steel) - Wikipedia I have in the past few years became more and more. Now securely hold your piece with whatever you have chosen. Cold bluing is not particularly resistant to holster wear, nor does it provide a large degree of rust resistance. It is named after the blue-black appearance of the resulting protective finish. Blued Pivot Steel Ive cut and pasted this to my notes on the cloud. Just remove the blue/rust, degrease, dry, then blue/card/boil-out/oil/drain. Also buffing wheels pre blue. There are many simple ways to achieve good bluing. Once you strip the blue & rust, then you can see what youre dealing with. Theres a reason why I buy up clapped-out guns and stuff where people look at me with a WTF?! With. If the sights need to be stripped & blued, follow the same procedure, but dont polish on them. This method was adopted by larger firearm companies for large scale, more economical bluing. You then oil or wax over the finish when youre done. Dont pour water in to your bath! Theres a reason I didnt pursue a career in chemistry. You turn up your nose at crap guns? So, you start with a clean gun, in the white, you play a propane torch over the gun to get it to the point where the blueing solution just will readily steam, but barely sizzle, and then you brush on the blueing compound. Theres nothing I see as super-dangerous about blueing other than trying to do hot salt blueing without all the correct safety equipment and precautions. (Its Crystalline Potassium Nitrate 100%) $6.18 Frequent TTAG commenter Dyspeptic Gunsmith saw the gun above in our postA Garden Gun Cultivates a Newfound Fascinationand answered reader questions about blueing/reblueing a gun thusly: If the rust is very fine and there is still substantial blueing left on the gun, you might want to strip the blueing. "height": "800", Mark the sharpened edge with a crayon. The hot washing soda tank typically used in gunsmith shops is caustic washing soda, and if you leave the gun in long enough, youll start to see corrosion on the gun before you get to the blueing step. Ships from and sold by Direct-Wholesale. 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? Can a softly tempered piece be re-tempered harder without going through the hardening procedure again? -A heat source. Use hemostats to hold a cleaning patch wetted with the solution and apply in nice, long, even strokes. Should something happen, seek medical help right away. Bluing is often a hobbyist endeavor, and there are many methods of bluing, and continuing debates about the relative efficacy of each method. (And taking, out of *your* hide). NaOH will quickly and completely dissolve aluminum. The loose oxide was then carded (scrubbed) off, using a carding brush - a wire brush with soft, thin (usually about 0.002in (0.051mm) thick) wires - or wheel. Hot bluing should never be attempted on aluminium, as it reacts it usually dissolves in the caustic salt bath. Alternatively. Gee, Im thinkin Duro or cero coat maybe even Krylon might be a good enough.. The steel is also used for producing great police flashlights with awesome durability. The parts are then boiled in distilled water, blown dry, then carded, as with rust bluing. it washes off with water. For the color change to be uniform you have to remove the grease, oil, paint etc or it looks blotchy. I had to sand and restain the stock, and sanded the barrel from 120 down to 400 grit the pitting was so bad. Examples of this finish are common on older pocket watches whose hands exhibit what is called 'peacock blue', a rich iridescent blue. If the magnet doesnt stick, its ready to be pulled away from the heat. 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. Technically speaking, bluing is more or less a conversion of red iron oxide (Fe2O3) to black iron oxide (Fe3O4). The salts will be a gooey caustic mess while theyre cold, and you MUST have covers on the tank when youre not using them, or the salts will climb over the edges of the tank and make a mess on the floor. Mea culpa. 35% Potassium nitrate (aka saltpeter), http://castboolits.gunloads.com/archive/index.php/t-36054.html. I use it, oh so cautiously in making my biodiesel. 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. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. You should note that the blue layer is rather delicate so dont treat it roughly. 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. Keep them in that state while you heat them but be sure to not boil up the tank. WebStep 1: Preparing Your Materials You will need: -2x containers (one of them preferably being metal for the oil) -oil -unleaded petrol/Acetone/Terpentine/Rubbing alcohol or any good 2023 All Rights Reserved by Shooting Mystery. The cross section and size of parts affect the outcome of the finish and time it takes to achieve. Contemporary heat-treatable steels did not exist or were in their infancy. Heat the gun parts. "Rust bluing" and "fume bluing" provide the best rust and corrosion resistance as the process continually converts any metal that is capable of rusting into magnetite (Fe3O4). You wouldnt need salts. The cotton gloves insulate your fingers from the heated barrel, and they prevent oils from your skin from getting on the raw steel. A Pocket Sundial From a Broken Pocket Watch! Bluing - Finishes for Metal - I Forge Iron If you want it smoother/shinier, you can polish up to 600 grit, with wet-or-dry paper. Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. In fact most guides no matter their material cast iron to bronze and often bearing races are installed the same way. It had been thoroughly degreased before my first attempt, but in trying to repair a poor result, I apparently contaminated it a bit. Note that it has to be a different tank from the one you used for Step 2. THANKS DG. Hopefully these concepts suggest caution and diligence for what you are doing. Hot blueing salts attack soft solders on guns, so it isnt to be done on old shotguns and some older rifles. Being prepared is important if you can not measure the temp. 2mm wire has a circumference of ~0.25in. Both ingredients are super cheap. Thermal Bluing - The Process of Heat Treating Watch Hands Its much cheaper anyways. *700F is very close to the heat treatment temperature of some steels.
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