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Black Oxide Coating: Strengthening Durability and Aesthetics in Metal Parts

30 November 2024

Black Oxide Coating

Alpha Detroit’s black oxide coating enhances the durability, corrosion resistance, and aesthetics of metal parts. Servicing Australia & New Zealand.

Black oxide coating is a surface treatment often applied to steel, stainless steel, copper, brass, and other metal materials. It offers industries a cost-effective solution to increase the lifespan and enhance the appeal of their metal parts.

The Process of Black Oxide Coating

The black oxide process, also known as blackening, is a chemical conversion coating for ferrous metals, stainless steel, and many more. It involves immersing the metal parts in a heated alkaline solution that contains oxidising agents. These agents then react with the metal surface, converting it into a layer of magnetite if applied to ferrous metals. The result is a thin yet highly durable layer that becomes a vital part of the metal surface.

How Does Black Oxide Coating Strengthen the Durability of Metal Parts?

The process of black oxide coating, when done by professionals, can provide the following benefits to metal workpieces.

•  Corrosion resistance: The black oxide layer provides a moderate level of corrosion resistance, helping to protect the underlying metal from rust and oxidation.

•  Oil retention: The porous nature of the black oxide coating allows it to retain oil, which can provide additional corrosion protection and lubrication for moving parts. 

•  Reduced light reflection: The dark surface reduces light reflection, which can be beneficial in certain applications.

•  Improved appearance: The coating gives a uniform black finish that can enhance the appearance of metal parts.

•  Minimal dimensional change: The coating process adds very little to the dimensions of the part, typically less than 0.000025 inches.

Given the benefits of black oxide coating, industries can truly ensure their metal parts and workpieces attain their desired characteristics and qualities. Additionally, this particular surface treatment is economical as it can be done relatively quickly without compromising quality.

While these benefits can contribute to the longevity of a metal part, it’s important to note that black oxide coating is relatively thin and doesn’t significantly increase wear resistance or hardness. For applications requiring increased strength or durability, other surface treatments or material choices may be more appropriate.

Black Oxide Coating: Applications

There are plenty of industries in Australia and New Zealand that can take advantage of the black oxide coating.

The automotive industry, for instance, can use this process to improve the corrosion resistance and wear of engine parts, gears, and fasteners. The military and defence can likewise use this process to strategically improve the appeal of their high-tactical gadgets and weapons by adding a matte finish and reducing their glare.

Consumer goods industries can also use black oxide coating as a way to improve both the appeal and longevity of decorative metal items, tools, and hardware. Even the tooling industry can take advantage of this surface treatment as a way to extend the tool life and cutting performance of the drills, taps, and cutting tools.

The black oxide coating process is one of the key processes offered by Alpha Detroit Heat Treatment to industries seeking to improve the appeal and longevity of their respective metal workpieces. By contacting our professionals, you are guaranteed to improve the performance and lifespan of your metal components without affecting their precision or size.

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