Metal Finishing



Founded in 1941, we are the largest commercial black oxide company in the United States and one of the oldest and most recognized metal finishing companies in northeast Ohio. We have built our reputation over the years by being exceptionally responsive to our customer's needs.

We provide metal finishing services to a broad range of industries including automotive, architectural, hardware, electronics, machine tool, aerospace, medical, defense, firearms and ammunition, military, and both industrial and consumer products.


{{}} {{this.hide}} What is Black Oxide

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What is Black Oxide

Black Oxide, blackening, oxidizing, oxiding, black passivating, gun bluing . . . these terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. The black oxide process is a chemical conversion coating. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. The result of this chemical reaction is the formation of black iron oxide, magnetite (Fe3O4), on the surface of the metal being coated. Black oxide has a range of unique properties and benefits that can be applied to a variety of industries.

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Architectural Products

Black oxide architectural coatings give the architect, interior designer and merchandiser new ways to express themselves.

We work with professionals in creating the exact "look and finish" they are seeking for a given project.

Customers like the Ritz Carlton, Herman Miller and Liz Claiborne have incorporated blackened steel panels and fixtures into their designs.

These architectural industry case studies are just several ideas to show you how black oxide can make your designs stand out.

To learn more about black oxide finish for the architectural industry, call us today at 216-861-4431 (Bob McElwee x105 or Dave Tatham x113), or request a sample online.

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Restaurant Industry

Typical black oxide applications in the restaurant industry include:
  • Chairs
  • Counters
  • Railings
  • Tables
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Retail Industry

Typical black oxide applications in the retail industry include:
  • Countertops
  • Displays
  • Railings
  • Shelves
  • Tables
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Containment Fencing & Netting

Black oxide, widely used to coat mesh and stainless steel wire and cables, provides a natural appearance in black wire containment fencing and aviary netting environments like zoos and bird sanctuaries.
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{{}} {{this.hide}} Black Oxide Case Studies

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Black Oxide Case Studies

In the case histories, you can see the features, advantages and benefits of black oxide coatings as they relate to specific jobs.

Black oxide is often the answer to the question, "How can I blacken this metal?" With over 50 years of experience, you can rely on Cleveland Black Oxide to develop the best black oxide coating solutions for your application.

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Last Update: 2021-03-04