A. Black oxide on stainless requires activation using a warmed acid prior to oxidizing. While this activation isn't intended to degrade the chrome oxide layer, making black oxide pass salt spray is tricky and generally requires some secondary sealing such as weak chromic acid dip or dry touch oil.
Full Answer
How do you use black oxide on stainless steel?
Place the penetrating sealant provided with the black oxide kit into a clean bucket. Dip the stainless steel into the penetrating sealant supplied with your oxidation kit. Wipe the stainless steel with a clean, lint-free rag to remove the excess sealant. Allow the stainless steel to dry before using the stainless steel for its intended purpose.
Does black oxide stainless steel and brass have corrosion protection?
The corrosion protection for black oxide stainless steel and brass is top-quality, primarily because of their inherent properties. It is essential to note that the part’s configuration and its end-use will determine the after-finish.
Is there a black oxide coating for stsinless?
I have no experience with it, but it is supposedly developed specifically to provide a black oxide coating on Stsinless. Tried a few things over the years w/o much success.
What happens when oxygen is added to stainless steel guns?
Oxygen can have an adverse reaction with oxygen, forming a chemical compound that is harmful to stainless steel; steel combined with iron, water and oxygen will form iron oxide, or the technical term for rust. Most stainless steel guns--if not too damaged by rust--can become salvaged with the right materials and cleaners.
Can you put black oxide on stainless steel?
Black oxide coating can be used for many materials such as copper, zink, and stainless steel.
How do you blacken stainless steel?
0:001:17How to Blacken Stainless Steel, Black Oxide Patina - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo today we're going to darken some stainless steel with the solution called ni black 40. ThisMoreSo today we're going to darken some stainless steel with the solution called ni black 40. This solution gives you a charcoal - black finish on stainless steel.
Does black oxide stainless steel rust?
Black Oxide adds a mild layer of corrosion and abrasion resistance to fasteners. Like any material, black oxide treated fasteners can rust in the right environments. It will depend on if the fastener is damaged or marred, the type of metal with the black oxide treatment and environmental conditions.
Is black oxide a good gun finish?
The black oxide finishing treatment is a high-quality, corrosion-resistant finish that won't chip, peel or change the physical dimension of a firearm piece. As one of the least expensive corrosion-resistant finishes on the market, black oxide is often the preferred finish used on gun barrels and small components.
How do you make stainless steel stainless look like black?
1:434:48Stainless Black on Stainless Steel - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd again it's one of those that you need to put on and let it react for about three to five minutesMoreAnd again it's one of those that you need to put on and let it react for about three to five minutes if you leave it on longer the darker it will go. The important thing is to not let it dry.
Can stainless steel be made black?
Black stainless steel is the same composition of iron, chromium, silicon, nickel and carbon that makes up traditional stainless steel products, but it has a protective coating of polymer that creates a black matte finish.
What will blacken stainless steel?
Presto Black® SSB is a room temperature blackening solution for most stainless steel substrates. Supplied as a liquid, the SSB is a versatile solution that is used as a brush-on blackening solution.
What's better black oxide or stainless steel?
Stainless steel is smooth and can be slippery, especially polished stainless steel like on Victorinox SwissTools. Black oxide coating gives slightly better grip. The black oxide is not rough, but provides better tactile feedback than regular stainless.
Does black oxide coating add thickness?
Black Oxide is not a deposit, it is a Chemical Oxidation of the Steel, making the surface turn Black. It has almost no thickness, or at least any value as such. This is one of the reasons it is used in gun barrels, because it doesn't change the dimensions of the parts to be covered.
What is the best gun coating?
Cerakote is the current king of the hill when it comes to firearms finishes. A ceramic-polymer compound, it's specially formulated specifically for high-use, high-abuse-destined firearms. Several firearms manufacturers offer Cerakote as their standard finish since its wear and lubricating characteristics are excellent.
How do you do a black oxide finish on steel?
3:216:21How to do professional quality black oxide finishing in the home workshop.YouTubeStart of suggested clipEnd of suggested clipThree minutes now and the parts are black so it's time to transfer them into the water bath for aMoreThree minutes now and the parts are black so it's time to transfer them into the water bath for a final rinse. The blacking solution alone won't prevent the parts from going rusty.
What is the best finish to put on a gun stock?
The best finish to put on a gun stock is an oil finish. It is easy to apply, durable and can be used on finished and unfinished wood. Oil finish is also water-proof, prevents UV light from damaging the wood, and can last for several years.
How to clean a gun with a steel wool pad?
Dismantle any bullets from the gun and lay the gun on a solid surface, with the barrel away from you, while you are cleaning the gun. Moisten a steel wool pad with water and dip it in baking soda. If you don't have a steel wood pad, use a soft toothbrush or soft brillo brush as substitutes.
What is the chemical reaction that causes rust in stainless steel?
Oxygen can have an adverse reaction with oxygen, forming a chemical compound that is harmful to stainless steel; steel combined with iron, water and oxygen will form iron oxide, or the technical term for rust.
How to get rust off a gun?
Use a gun lubrication to polish up the most affected rust areas on the gun. Use a steel bore bristle (located at most gun shops), to polish up the stainless steel. Wipe off moisture from the gun with a fry cloth or paper towel; not wiping the gun completely dry will allows for the water to form more rust in the future.
How to get black finish on a gun?
Find a way to handle your gun from a distance or hang it over the fire. To reach all parts and sides of your gun, make sure to spin it around slowly and constantly. Once you reach the black finish you desire, you can now place your gun inside a pile of ground coffee and leave it to cool down for a couple of minutes.
How to darken steel?
The last method on how you can darken steel is by using vinegar. The acid in vinegar reacts a certain way to the metal which leads to the darkening effect.
How long does it take for a gun to dry?
Inspect your firearm and see if you missed any spots. Once all areas are painted black, leave it to completely dry. This can take hours, but it can also depend on what paint you use and how great its quality is. Aside from using a brush, it would also be a good idea to use a wet sponge.
Why do you need a black barrel on a gun?
Having a black steel barrel is also great if you’re planning on making an ambush on foot. The black steel will make it easier for you to stay hidden compared to having a bright and shimmering metal of a regular stainless steel gun.
Can you use a dry sponge on a gun?
Using a dry sponge could damage the finish of your gun and leave imprints on its surface. After that, you just need to repeat the process until you reach your desired results. The more you repaint, the thicker the paint layer will be.
Does coffee ground make a gun darker?
The coffee ground also helps with dyeing your gun to a darker shade, so that’s a plus. This method won’t leave your gun as black as it would be if you use paint, so you might have to repeat the process several more times until it becomes black.
Can you darken stainless steel?
This method is the easiest way to darken the stainless steel of your gun, but it’s not the most aesthetic method. It’s possible that the paint can peel off, and it’s also possible that it won’t leave a smooth finish on your gun. This might interfere with how you handle your firearm, which is a situation you probably don’t want to end up in.
Red rust through black oxide on SS part
Q. During a recent investigation concerning the use of a black oxide process on a 304 stainless steel part, our department noticed red/orange spots on the surface of the part subsequent to 72 hours of ASTM B117 [affil. link to spec at Techstreet] salt-fog. The salt spray test was run to confirm the proper passivation of a weld on the part.
Need Sodium and Potassium DiChromate
RFQ: [Where to get] Sulfuric Acid H 2 SO 4 Sodium DiChromate Na 2 Cr 2 O 7 Potassium DiChromate (to blacken stainless steel parts)
Black Oxide on Stainless: Smut residue problem
Q. As a small gunsmithing shop, I have recently been attempting Hot Black oxide on Stainless Steel: Barrels, Frames, small parts, etc. Mostly 416 type SS. While my attempts have been producing a deep rich and uniform color, There is a significant amount of black residue (smut)left on the parts that must be wiped off during reassembly.
Black Oxide on stainless finish WITHOUT sulfur
Q. My company currently uses black chromium plated stainless (type 304 and 316) parts for experiments, but would like to replace this with a less expensive and more robust black oxide process. The blackening is for optical absorption, such as laser dumps, laser baffles, and spectrometer view backgrounds.
Can 15-5 PH Stainless H900 be Black Oxide Coated
Q. We are building a prototype for a military application, and would like the appearance of the final prototype to be black in color. Most of our exposed stainless parts are 15-5 PH age hardened to condition H900.
How to use black oxide on stainless steel?
Place the penetrating sealant provided with the black oxide kit into a clean bucket. Dip the stainless steel into the penetrating sealant supplied with your oxidation kit. Wipe the stainless steel with a clean, lint-free rag to remove the excess sealant. Allow the stainless steel to dry before using the stainless steel for its intended purpose.
Why is stainless steel black?
Because heating these chemicals was bad for the environment, new chemicals have been developed to turn stainless steel black or brown. A black oxide kit gives anyone the ability to complete oxidation on metal surfaces and achieve a professional quality appearance.
What is bluing in gun barrels?
Bluing, commonly used to change the color of gun barrels, is used when the chrome-like color of stainless steel is not desirable. Advertisement.
What is Black Oxide?
Black oxide is one conversion coating type that offers metal parts with an improved matte black appearance. A conversion coating describes a process that occurs through an electrochemical or chemical treatment of the surface in question.
The Black Oxide Finish Process
Generally, there are five simple yet important steps for black oxide coating. These include cleaning, rinsing, applying the black oxide, rinsing, and supplementary coating.
Types of Black Oxide Finish for Precision Machined Parts
Manufacturers currently use many different surface finishing processes to achieve the black oxide coating on metals. However, there are two broad categories of black oxide. They are the hot and cold blackening processes. Each of these categories comes with unique formulations for the proprietary coating to complete the surface treatment.
Materials for Black Oxide Finish
Black oxide coating protects several ferrous metals, steel, and stainless steel parts. However, manufacturers have additionally developed specialized coatings to make black oxide finishes on copper and zinc components.
Common Applications for Black Oxide Finish for Precision Machined Parts
Black oxide has a wide variety of use in different industries. The reason for this is not far-fetched. This finishing process provides the corrosion resistance and strength required on the battlefield and the essential functioning needed for surgical and medical tools. It is a versatile finish for several different materials.
Pros and Cons of Black Oxide Finish
Applying a black oxide coating on materials offers several different benefits, ensuring smoother operations of devices and components. However, this finishing process also comes with some downsides, which are important to note. Here, we will examine the various merits and demerits of black oxide in custom manufacturing.
RapidDirect: Your Preferred Partner for Precision Machining Projects
Whenever you are ready to discuss your next custom manufacturing project, RapidDirect is ready to serve you. Our clients in several different industries specify the black oxide finish for many of their precision machined parts.
What is the black coating on iron?
Native black coatings on Iron are Ferric Oxide (Fe 2 O 3) or Magnetite (Fe 3 O 4 ). Neither of which will long withstand high temp steam. Automotive parts often use a Iron Silicate, great for dry heat, but that too will decompose in high temp steam.
What temperature does steel turn blue?
Too cold, boil off some water. Watch the temperature and keep the solution at a rolling boil. Plain old leaded, cold roll steel will turn dark black blue at around 280 degrees. Chrome molybdenum steel will turn deep blue at 300 degrees. Nickel steel will turn a slightly lighter shade of blue at 305 to 315 degrees.
What temperature to boil salts to kill them?
Too cold or too cold and boiling, no reaction (no black oxide). Boil off water until temperature comes up. Over 301 ^ 310 deg Fahrenheit will burn the salts and kill the solution. Chemicals have to be added periodically to replace carry out.
What color is nickel steel?
Nickel steel will turn a slightly lighter shade of blue at 305 to 315 degrees. Chrome vanadium steel will turn a deep orchid purple at 300 to 315 degrees. The amount of rust prevention is dependent on the type of finish the part has, careful maintenance, i.e., keeping oil on the blued surface and the steel type.
What temperature should salt be to kill salt?
Over 301 °F will burn the salts and kill the solution. It should read that exceeding temperatures of 310 °F will kill the solution. In truth it is about 330 degrees but the solution at the bottom of the tank is often much hotter than the solution at whatever depth the thermometer happens to be sitting at.
Can you handle cyanide?
The mixture is commercially produced, so no need to handle cyanide or any other dangerous chemicals. If you have any reservations about the safety of the process, take it to the professionals. Black oxide chemical mixtures will eat right through your cloths and skin in a matter of seconds.