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Youll get a dark spot right there. Submerge in water and scrape edge. Free shipping. Im asking because theres a guy on YouTube recommending Brown Express first, then several layers of Blue over that. 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. "sameAs": When polishing something like the above rifle/shotgun, youve got a pretty light coat of rust, without severe pitting. Metal parts that look black or blue-black are usually blued (rather than painted). The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. }, Tenifer get's up to (1077F) last I checked and was the 5th step in Glock heat treating after that they Pakerize it. If you are new to the subject and are in need of detailed instructions, then youve come to the right place. Oil and grease really are the enemy because youre trying to (literally) corrode the metal. It does provide good rust resistance, which is improved with oil. Above you can see some example pictures of the colour shades that can be achieved with this techniques. If youre interested, just ask and I can provide more details. OK, now with the sights out and the trigger group off, you can put on the rust/blue remover on the barrel/action. (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! Similarly, stainless steel parts may be immersed in a mixture of nitrates and chromates, similarly heated. Both refer to the same chemical process for providing true gun bluing.[1]. Drift the sights back in from the right side of the barrel. Sometimes at this point, I come just a fraction away from the heat to go through colours a bit slower. Think big scars. Mea culpa. Besides those, you must also have water displacing oil and cleaning solution (Dicro-Clean 909). Itll evaporate rather rapidly, but still, dont whip it at cars or house finishes. To heat this, I use a Coleman camp stove and a 15# jug of LPG gas. If you want to blue something fast I have a cheap hot blue method: Lowes stump remover: High temperatures and dangerous chemicals mean that a moment of carelessness can make you pay a heavy price. It is always essential to remove all oils from metals you want to blue, even if the cold blueing solution claims you dont need to do so. Try it on some unimportant pieces first. They should start gassing up approximately 2 to 3 minutes after exposure. Question I can keep a Krylon can always handy for touch-ups. These processes were later abandoned by major firearm manufacturers as it often took parts days to finish completely, and was very labor-intensive. Take them out after a couple of minutes and then wipe them clean to remove excess oil. Todos los derechos reservados. WebThe gun bluing process Start with 1 gallon of water and add it to a deep fryer that has been thoroughly cleaned. They have their place, but doing a whole gun with them isnt that place. Larger flames produce less heat while smaller flames produce a higher heat. When you buy through links on our site, we may earn an affiliate commission. $3.59. A couple bottles of aged bourbon minimum. The de-greasing you do directly affects the uniformity of the browning or blueing. Your 700F temp is too high, IMO. Next comes the main part. I didnt drop outta my mommas womb being able to do this stuff. You have a degreased gun, and now you need to get the metal hot enough that the reaction will oxidize the steel as much as possible. You risk a big fire that is self sustaining by the reaction itself. On this Wikipedia the language links are at the top of the page across from the article title. Salts. "author": "Christopher Graham", Fill the tank with a suitable amount of water then add in the bluing salt using the correct ratio. Posted December 21, 2009. 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. Prepare the components of the metal surface before you attempt to blue using your tools. Add in the 250F+ temperatures of the salts when they hit your skin, and youre both burned thermally and chemically in seconds. Spilling salts at this temperature will instantly result in fire, because the KNO3 is a powerful oxidizer all on its own, and the added thermal energy will light anything on fire all alone. This works well for me. After "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). This will keep the bluing from adhering to the sharpened edge. This item: Special Blue Full Metal Butane Torch (Gold) - Refillable Flame Lighter- Culinary Torch - Welding Torch - Adjustable Dual Flame for Desserts, Creme Brulee, BBQ and Baking. This is all from memory so I might have left some stuff out. Gas burners can usually do the job for this. 1. Heat the gun parts. With HSS you're looking for 2500-3000rpm, M35 or M42 cobalt bits 3000-3600rpm, and carbide 10k-12krpm. 5 years ago, I found that heating will turn steel silver ~> gold ~> violet ~> blue. By signing up you are agreeing to receive emails according to our privacy policy. *Potassium Nitrate is an oxidizer. Reply Do all the prep you would for express or rust blueing, especially degreasing. Safety is the number one priority so protect your body as much as possible. In the nitre bluing process, polished and cleaned steel parts are immersed in a bath of molten saltstypically potassium nitrate and sodium nitrate (sometimes with 9.4 grams (0.33oz) of manganese dioxide per pound of total nitrate). Colour case hardening occurs when soft steels were packed in a reasonably airtight crucible in a mixture of charred leather, bone charcoal and wood charcoal. Modern home hobbyist versions of this process typically use a hydrogen peroxide and salt solution, sometimes with vinegar, for the rusting step to avoid the need for more dangerous acids.[7]. Battery acid is childs play compared to blueing salts. The actual temperature of the steel depends on the carbon content inside. Vegetable oil has a higher boiling point, so the hot steel will take longer to cool and reduce the chance of it cracking. I have to finish my M76 and Galil first and buy the materials. I like 1.5 wide shop cloth myself). 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. Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. Sign up for wikiHow's weekly email newsletter. However, if the bluing effect isnt satisfactory, then you can try giving the components an acid bath (using Hydrochloric Acid). Repeat 3 times. Be careful since considerable heat might be generated in the process. I plan on doing this on a couple of older beaters first. Ill go into parkerization later this week. This is one of the reasons rust and fume bluing are generally more rust-resistant than other methods. ALL RIGHTS RESERVED. tighter your arc, the less the heat input will be. Holy crap, did that reaction hurt like hell. Rinse them in a cold water tank after. That way, you can still use your oven for the rest of the evening. Thanks for always being so willing to share, Sir. There wasnt a whole lot of pain just yet until my buddy took the safety bottle of vinegar solution used to neutralize the alkaline NaOH salts, and then the pain was there. This step should be done before heating the steel, as the steel should be quenched immediately after removing from heat. 5. Above you can see some example pictures of the colour shades that can be achieved with this techniques.Have fun doing it! For this reason, it is considered not to add any appreciable thickness to precisely-machined gun parts. How to Blue Bluing Steel Using Oven Or Torch and Oil Method. If you are referring to torch bluing, the Wipe them down with WD-40 on a regular basis. Its oiled in production to keep it from rusting on store shelves. They melt at, oh, somewhere about 280F. In the automotive world this is a common practice. When youre done and have neutralized & washed off the Express Blue #1 solution, you then should spray down the barrel with water-displacing oil. Keep them in that state while you heat them but be sure to not boil up the tank. My apologies for the background noise in the first half of the video We had compressors running where I 8 years ago Also, the results you indicate are typical of still having some oil on the gun. Heat the area you'd like to drill just until it starts to glow red, then allow it to cool slowly. The book claims they used wait for it "boiling gasoline" not making this up to clean them. NaOH will quickly and completely dissolve aluminum. you could also heat this size tank with anything from a hibatchi up to a Weber charcoal grill or you could put it on top of a wood-burning stove or even a kitchen stove. Then you have to heat the metal. (You say the rod was heated, but it couldn't have been, as it was on the inside. You have to apply the bluing fluid. To shrink, I assumed you heated the steel plate only, to expand the hole in it. First, let us go through a couple of bluing concepts that you have to know in order to achieve the desired result. Another good test for determining when the steel is ready is seeing if a magnet sticks to its surface. Use your torch to bring up "name": "Shooting Mystery", http://www.lowes.com/pd_188198-316-HG-66420_0__?productId=4764059 "Cold" bluing is generally a selenium dioxide based compound that colours steel black, or more often a very dark grey. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). When heat treating a forged blade you get the whole knife glowing, then submerge just the blade in the oil for 8 seconds. RF: Expect a write-up from me on Rust blueing and parkerizing in the next couple of weeks. Blue or Black rust is complete passivation of the steel surface Fe3O4. Great column, and thanks for all the responses to various questions and comments. Then you sight down the barrel and you see dips and waves in the barrel profile. You might also want to read our article on how to easily darken stainless steel or blacken stainless steel for more ways to personalize your gear. The object on the left is a custom mild steel potentiometer knob! Get it Feb 25 - 27. The blueing salt bath will be at about 286 to 292F, and as it is bubbling away, it is losing water, and the boiling point of the solution keeps climbing. -something to hold your object with i.e. Ships from and sold by Direct-Wholesale. It is not nice stuff. Dont. 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. If you have very light, fine pitting, you can polish this out. My dad keeps his in a big safe with large desiccant packs that he threw in there. Ive used this method in a pinch to make a tap from a cheap mild steel bolt to chase out galled female threads. Black oxide provides minimal protection against corrosion, unless also treated with a water-displacing oil to reduce wetting and galvanic action. There's also blued hardware available, like nuts, bolts, screws, and hinges. This finish allows them to be stored in high-moisture conditions, like sports bags, without rusting. 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. Red rust is Fe2O3, and is incomplete rust it will continue allowing the surface to corrode over time hence the oil or wax. Its a good process, but it isnt a 1:1 replacement for blueing. Different colors can be achieved through variations of this method including quenching in oil instead of water.