Black Anodizing

A reliable source for Aluminum Anodizing information and leading Aluminum Anodizing Companies.

To understand how a metal can be dyed black, the basic process of anodization should be understood. Anodizing involves using a corrosive chemical and electrical current to alter the chemical body of certain metals and make them stronger in the process. Read More…

Black Anodizing Black anodizing is a process through which the surface of an anodized metal is dyed black. Before the sealing stage of anodizing, the oxide surface of a metal can be dyed. This is done when the exterior appearance of the product is significant. There are countless dye colors to choose from, including black anodizing.

Leading Manufacturers

Toronto, ON  |  1-888-741-6159

Wouldn't it be great if there really was a superhero that could swoop in and meet all of your extrusion needs? Well, think of Extrude-A-Trim as the next best thing. We have one of the largest inventories of specialty extruded aluminum products in North America. Here at Extrude-A-Trim we offer aluminum anodizing to increase corrosion and wear resistance. Get your free quote today!

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Extrude-A-Trim $$$

Westbrook, ME  |  207-761-0392

Silver and gold. Got your attention? We do silver and gold plating as well as aluminum anodizing. As a matter of fact, we also perform copper, gold, nickel and tin plating. We are full-service people. Rack chromic, sulfuric and hardcoat anodizing are some of our processes. FAA, AS 9100 approved.

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Silvex Surface Technology $$$

Chatham, ON  |  877-556-9191

Dajcor Aluminum is the leading Canadian supplier of extruded, fabricated/machined and anodized components and assemblies to the automotive, renewable energy, transportation, building trades, military, recreation, and consumer-product industries. Dajcor is an aluminum extrusion company, with complete value added in-house capabilities – your ‘One-Stop’ extrusion supplier!

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Dajcor Aluminum Ltd. $$$

Dexter, MI  |  734-426-2855

Since 1976 Alpha Metal Finishing has been a trusted leader in anodizing, hardcoat and chemical film (chromate conversion) services. In addition, Alpha now provides stainless steel passivation. We are passionate about providing superior quality, rapid turnaround, and friendly, responsive service. Alpha is ISO 9001:2015 certified. Call us today for your finishing needs!

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Alpha Metal Finishing Company $$$

Syracuse, NY  |  315-471-6143

For over 40 years, Anoplate Corporation has offered high-quality metal finishing services—titanium and aluminum anodizing; anodizing of components; electroless nickel PTFE finishing; plus impregnating services. Our anodizing processes include chromic, sulfuric and hard coat anodizing.

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Anoplate Corporation $$$

Burbank, CA  |  800-497-5569

For over 50 years, K&L Anodizing has provided metal finishing services for manufacturers, machine shops, tool & die, aerospace, medical, government & commercial industries. We provide multicolor anodizing; anodizing per Mil-8625—types I, II, III—dyed & non-dyed; & a variety of related services.

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K & L Anodizing Corporation $$$
placeholder image Extrude-A-Trim Silvex Surface Technology Dajcor Aluminum Ltd. Alpha Metal Finishing Company Anoplate Corporation K & L Anodizing Corporation

There are many types of anodizing acids, including sulfuric and chromic as the major anodizing contenders. However, some acids such as organic and boric are used in custom anodizing situations because they can offer more control in smaller settings. Metals commonly anodized are aluminum, titanium, magnesium and zinc. The new characteristics of an anodized metal are increased strength and corrosion resistance, a thicker and smoother protector then regular paint or metal plating. However, the process does make the metal more brittle, so extreme temperatures can cause damage. Depending on the style of anodizing and the type of metal, dying the product is possible.

Because the basic black dye is made from an inorganic substance, a chemical mixture called ferric ammonium oxalate, dyes used in black anodizing tend to be more lightfast. The same chemical is used to produce gold dye. To be lightfast means that the colors tend not to fade as quickly. This is true of any inorganic dye used during an anodizing process.

Black anodizing is produced in the same basic fashion that all colors for anodizing are produced, although there are a couple alternative processes too. Most anodizing processes, such as the sulfuric acid, make the surface of a metal more porous and therefore able to soak and retain the color of dyes. So directly after the major chemical shift in the metal's crystal structure, a dye can be applied.

Once a metal has been dyed, hot water or steam, often mixed with nickel acetate, is used to seal the surface and to convert the oxide into its hydrated form. This process decreases the potential of bleeding and can improve corrosion resistance. A black anodized product can also be made by way of metal dyes, which are electrolytically deposited in the pores.

Organic dyes are actually used during the chemical immersion of a product. The dying process is utilized in almost every industry and application non-colored anodized products are. A couple examples include the electronic field, which sells colored Mp3 players, flashlights and cameras, and the cooking industry, which often markets two-toned cookware.