It has been demonstrated that the anodization of colors into metals, including the components of aluminum, is a reliable method that not only maintains but also improves the general quality of the materials. The functional refinement of aluminum alloys and other metals can be assisted by the hard anodization process. Cleaning, acid desmutting, anodizing, coloring, and anodizing sealing are the stages that must be completed before the anodization of colors into metals can be considered complete. The hard anodization of colors into metals is a process that, all things considered, creates metal products that are long-lasting, resistant to scratching, and resistant to corrosion.

How Can You Color the Metals That Have Been Anodized? Following is a list of these:

In the first type of anodization, known as type 1, the chromic acid electrolyte is utilized. The metal or aluminum component goes through an electrochemical process that results in the formation of a fine, non-conductive, and extremely thin anodized coating.

Anodization of the Type 2 Variety: This method makes use of sulfuric acid as the electrolyte.

1. The anodized coating that is formed by method number three of anodization is the most substantial of the three

2.  During the process, a sulfuric acid bath is also utilized as part of the procedure

3.  The use of this technique results in metals, including the production of aluminum components, that have the added benefit of being suitable for environments in which extreme wear is possible

What Are the Different Types of Acid That Are Used to Color the Anodizing Process? Following is a list of these:


The following is a list of the advantages that come with color anodizing:

Aesthetics: The process of color custom cnc milling allows for the application of a wide range of colors.

The product has an exceptionally long life span, which allows for the accumulation of economic benefits over its course of use over an extended period of time.

Anodizing is a useful process because it creates a perfectly formed oxide layer all around the metal, which provides excellent resistance to corrosion. This protects its metallic quality from the degrading effects of corrosion and ensures that it retains its original state.

The following is a list of the steps involved in color anodizing:

To begin the electrochemical process, make electrical connections between the metal components, the battery, and the acid or electrolyte.

Before removing the anodized metal from the sulfuric acid bath, the process should be allowed to continue for approximately 45 minutes. Make sure that you do this in a room that has adequate ventilation.

The following is a list of the colors that can be achieved by custom cnc milling aluminum:

Copper Silver Gold

When Are the Different Colors of the Hard Anodizing Process Applied?

Hard anodizing colors should be applied whenever there is a possibility that wear and tear will occur, particularly in environments that are harsh or caustic. The typically glossy and smooth surface can be moved around easily on a variety of different surfaces.

The Process of Anodizing in a Variety of Colors

The process of custom cnc milling aluminum in a variety of colors is broken down into the following steps:

Cleaning: The metal of choice should not be used directly; rather, it should go through a cleaning process that gets rid of foreign matters and light oils before it can be used. This is the first step, and it is essential that it not be skipped. If you do not do this, the custom cnc milling process could be slowed down.

Etching has the disadvantage of leaving a deposit of smut or dirt on the surface of the aluminum, which must then be removed using acid desmutting. This smut, which is a remnant of a metal alloy and is insoluble in sulfuric acid, can appear gray or black depending on the lighting. To get rid of it, put the metal in a solution of nitric acid. This should do the trick. It is necessary to make use of an appropriate electrolyte, such as sulfuric acid. A battery that is capable of delivering a high DC voltage is also very useful. After the application of high voltage, the formation of an anodic film or metal oxide is contingent on the electrolyte concentration, the temperature of the custom cnc milling process, and the current density. After the dye has been taken up by the pores that were produced as a result of the anodization process, the metal is boiled in water that has been distilled to stop any further chemical reactions from occurring.

Sealing via anodization: nickel fluoride cold sealing, also known as NFCS, and nickel acetate hot sealing, also known as NAHS, are two well-known custom cnc milling sealants. This is the last step, and it helps prevent the color from being pried or scraped off forcibly.

There is a huge variety of different ways that color custom cnc milling can be used in the manufacturing process. On the other hand, the following are some applications that have been listed:

It is possible to color-anodize metal components found in homes, such as door handles and window frames made of metal.

What are some helpful hints to keep in mind when color anodizing?

If certain components need to have the same tint of color, it is essential to assemble them side by side so that they can be painted at the same time.

Do not rely on pictures; instead, obtain a sample that has been approved. Because of the effect that lighting has, the color of images of metal components saved on a laptop or other device might be slightly different from the color of the component in real life. It is recommended that all of the product's components be anodized at the same facility. This will ensure that the desired level of color consistency is reached.