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This section provides an overview for black oxide coating services as well as their applications and principles. Also, please take a look at the list of 11 black oxide coating service companies and their company rankings. Here are the top-ranked black oxide coating service companies as of December, 2024: 1.S&P Heat Treating, Inc., 2.Mid South Metallurgical, 3.Peters' Heat Treating, Inc..
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Black Oxide Coating Services is a surface treatment method for metals to prevent rust.
The surface is oxidized by boiling the metal in an alkaline solution to form a black film. Black Oxide Coating Services is mainly used for rust prevention on steel parts.
The advantage of Black Oxide Coating Services is that the film is very thin and there is little change in the dimensional accuracy of the original metal. It has excellent wear resistance and retention properties, and is environmentally friendly as there is no need to dispose of the chemical solution. Another advantage is that it is a rust-preventive treatment at a lower cost than the plating process.
On the other hand, the disadvantage of Black Oxide Coating Services is that it can only be done in black color due to the characteristics of the chemical solution. As with plating or painting, it is basically impossible to match the color with other parts. It is also important to note that a rust inhibitor must be applied to maintain the rust-preventive properties.
Black Oxide Coating Services are used to improve corrosion resistance, enhance appearance, and prevent reflection.
The essential use of Black Oxide Coating Services is to improve corrosion resistance by creating a black film. In addition to the fact that dimensional accuracy remains almost the same before and after processing, the processing cost is relatively low, making it suitable for a wide range of applications.
The soothing black color produced by Black Oxide Coating Services gives a luxurious feel and is used to enhance design. It is used not only for industrial products, but also for interiors and artwork.
Since black processed metal parts are less shiny, they are used to prevent reflections. By preventing light reflection on visible parts such as manufacturing machinery, it is possible to alleviate stress on workers.
Black Oxide Coating Services improves the abrasion resistance of steel materials, and the rust inhibitor also improves lubricity.
In Black Oxide Coating Services, steel is placed in an alkaline solution containing caustic soda and heated to 140-150°C for 15-20 minutes to cover the surface with black rust. The component of this black rust is tri-iron tetroxide (Fe3O4), which is a stable passive film. This prevents red rust from forming on the steel and improves its rust-preventing properties.
Black Oxide Coating Services is a process that has little effect on dimensional accuracy because the thickness of the coating is only 1-2 µm. It is a chemical reaction treatment of the surface and will not peel off like plating or painting. Another advantage is that it is wear-resistant and oil-impregnated. The porous surface retains the rust inhibitor.
Black Oxide Coating Services has the advantage of low heating temperature, which has little effect on material strength and material properties.
Black Oxide Coating Services is sometimes called "black plating," but the basic method and finish are the same. Similarly, the processing methods called "ferumite treatment," "SOB treatment," and "alkali treatment" are not different from Black Oxide Coating Services.
Although there are differences in the color tone depending on the chemical formulation and facilities used, Black Oxide Coating Services itself is not classified into different types.
Chemicals are used in each stage of Black Oxide Coating Services.
1. degreasing process
In the degreasing process, water-soluble alkaline degreasing agents are used. It is a water-soluble degreasing and cleaning agent with nonionic surfactant, nonflammable, and odorless. It has strong degreasing and cleaning power equivalent to that of chlorine compound solvents. When draining, use dilute sulfuric acid for neutralization due to its low alkali concentration.
2. Rust removal process
Rust removal is performed using an iron rust and scale remover. The agent is hydrochloric acid to which is added an acid that promotes rust and scale removal, a surfactant that stabilizes the agent, and an inhibitor that prevents hydrogen embrittlement and over-peeling.
3. black dyeing process
A heated black staining agent is used to cover the steel with a jet-black iron tetroxide film. Castings and special steels, which tend to have a reddish tinge, can be finished in jet black. The agent conforms to U.S. Department of Defense MIL standards, U.S. aerospace material standards, International Organization for Standardization standards, German industrial standards, etc.
4. Rust Prevention Process
After the blackening process, a corrosion inhibitor is used. This medium-term rust inhibitor has excellent water displacement properties and is suitable for rust inhibiting treatment on wet parts and in humid environments. The estimated period of rust inhibiting is 6 to 12 months.
*Including some distributors, etc.
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Peters' Heat Treating, Inc. has been a manufacturer specializing in precision parts heat treating since 1979. The company is headquartered in McKean, Pennsylvania, United States. Some of the services they offer include vacuum heat treating, atmosphere heat treating, induction heat treating, cryogenic processing, and black oxide finishing. These services are used to improve the properties of metal parts, such as their hardness, strength, and durability. The company is ISO 9001:2015 certified for its quality management system.
Parker Trutec, Inc., established in 1988 and headquartered in Ohio, USA, is a manufacturer of surface treatments for metal components. The company offers various coating and heat treatment solutions, including e-coat, zinc phosphate, and black oxide. Its powder coating solutions provide a decorative finish for appliances and marine components, and its isonite nitriding treatments, including Li2Fe3, salt bath, and gas soft nitriding, improve the hardness and fatigue resistance of metal parts. The company's products are used in agriculture, marine, and military industries. It also offers hem sealing, shot blasting, and clamping press services.
Texas Precision Plating, Inc., founded in 1966, is an American manufacturer based in Garland, Texas, specializing in plating services. Its range of offerings covers plating processes such as copper, gold, nickel, silver, tin, and zinc plating. Additionally, the company undertakes chromic, sulfuric, and hard anodizing—a technique for generating oxide coatings on aluminum substrates. Black oxide coatings are also provided, along with phosphate coatings to enhance corrosion resistance. The company further engages in bright dipping for brass and copper, as well as passivation to eliminate corrosion from stainless steel surfaces. The company serves various industries, including aerospace and military, automotive, commercial, and electronics.
Peregrine Metal Finishing, founded in Canada in 2016, is a supplier of metal treatment services. The company offers a variety of surface coatings, including plating, anodizing, and powder coating, to improve corrosion resistance and aesthetics, metal finishing services to ensure that treated metals meet specific texture and appearance requirements, and passivation services to enhance the corrosion resistance of stainless steel and other metals. It also provides tailored metal treatment solutions to cater to the specific industry needs.
Parts Seiko Co., Ltd., founded in 1985 with headquarters in Misato City, Japan, is a supplier of toll-manufacturing and assembly services. The company specializes in creating parts for clients as well as integrating parts creation and assembly with its in-house production system. The company also offers parts cutting, machined parts, castings, and molding, which includes special surface treatments. Clients can engage with the company for individual services or commission product manufacturing, which includes all of the services it offers.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | S&P Heat Treating, Inc. |
27.3%
|
| 2 | Mid South Metallurgical |
16.4%
|
| 3 | Peters' Heat Treating, Inc. |
12.7%
|
| 4 | Texas Precision Plating, Inc. |
12.7%
|
| 5 | Seminole Metal Finishing, Inc. |
12.7%
|
| 6 | EFCO Finishing Corporation |
7.3%
|
| 7 | HLH Rapid |
3.6%
|
| 8 | Peregrine Metal Finishing Ltd. |
3.6%
|
| 9 | Parker Trutec, Inc. |
1.8%
|
| 10 | Part Seiko |
1.8%
|
Derivation Method
The ranking is calculated based on the click share within the black oxide coating service page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 57.1% |
United Arab Emirates
|
1 | 14.3% |
United Kingdom
|
1 | 14.3% |
|
Canada
|
1 | 14.3% |
