Anodizing is an electrochemical process. When an anodizing tank is used this process will be speeding up the natural oxidation of a group of non-ferrous materials. The purpose behind this process is to improve the hardness and wear resistance of material surfaces. Users are placed in a position to manipulate the oxidation thickness. The two most common materials that tend to need anodizing processing are aluminum and titanium. Parts and components derived from anodizing processes will be fed into numerous industries.
These will include commercial, automotive, medical, as well as military applications. The anodizing process can also change the colors of parts and components by way of using dyes. This would usually be the case in aluminum. At the same time, anodizing is being used to manipulate electrochemical parameters, as would be the case in titanium. Note that the color proviso is not always for aesthetic purposes. Color use is necessary for identification purposes, as in the case of medical equipment. For example, the color of a medical screw could determine the screw’s thread diameter and dimension.
Color coding is a good check for inventory controls. Three kinds of aluminum anodizing processes are being used. These include the chromic acid chemical bath, the sulfuric acid chemical bath and the hard coat anodizing process. Chromic acid baths, for instance, are used to provide applications with just a thin and protective coating but with high levels of corrosion resistance. While sulfuric acid baths are said to be the most cost-effective, the hard coat application is required for hard surfaces that need to remain hard for as long as it is being used.
The firearm is one such example. You may have noticed that this is a device that is not color-dyed but is retained in shades of gray. This is done by altering bath compositions.