Continuous Anodization
Anodization is typically a process of electrolytic passivation used to increase the thickness of the natural oxide layer on the surface of a metal workpiece. Continuous anodization is a process by which an anodized layer is gradually and continuously formed on the workpiece surface. This process is used in various industries, including manufacturers of electronic components, medical device components and consumer products such as cookware, food equipment, and other parts.
The process starts by preparing the substrate for anodization. This involves cleaning the surface with a chemical solution, usually an acid or alkaline soak, to etch away any contaminants and impurities. The surface is then polished to remove any scratches or irregularities that might cause problems during the anodization step.
After cleaning, the workpiece is then immersed in an electrolyte solution, usually containing sulfuric acid, and a direct current is applied to the electrodes. The anodization takes place in two stages. In the first stage, the current causes the formation of a protective layer on the surface of the workpiece, known as the anodic film. As the voltage is increased, the formation of the anodic film becomes faster, and the thickness of the coating increase as well.
During the second stage, the voltage is further increased. This causes the anodic film to become thicker and more uniform. The thickness of the coating varies depending on the current and the type of electrolyte used. At the end of the process, the thickness of the anodic film is evaluated, and adjustments can be made if necessary.
The continuous anodization process is simple, efficient, and cost-effective. It allows for the formation of accurate and uniform layers on workpieces of all shapes, sizes, and materials. It also produces a high quality and durable oxide film that is resistant to corrosion and wear, making it suitable for a variety of applications.
The thickness of the anodized layer is also an important factor. The desired thickness must be determined beforehand, as increasing the current may result in too thick a layer being applied, which could affect the performance of the finished parts. Standard anodization processes can produce films up to about 20 micrometers thick, depending on the type of current used.
Continuous anodization can also be used to produce unique decorative finishes. Different voltages and current flow can result in different colors and textures, providing manufacturers and designers with more options when designing their products and components.
In conclusion, continuous anodization is a reliable, cost-effective process that produces quality, durable films superior to other treatments. It is ideal for producing a range of different finishes, depending on the needs of the manufacturer, and its ease of use makes it an increasingly popular choice with designers and manufacturers alike.
