22V 22KA rectifier for anodizing

Aluminum oxidation (also known as anodizing) is an electrochemical process used for the surface treatment of aluminum and its alloys, with the primary purpose of enhancing the corrosion, abrasion, and aesthetic properties of aluminum. Prior to oxidation, the aluminum surface needs to be thoroughly cleaned to remove oil, dirt and oxides. Commonly used cleaning agents include alkaline and acidic cleaners. After cleaning, aluminum parts are often acid etched to further remove surface oxidation and irregularities. Commonly used acids include sulfuric acid and hydrofluoric acid. The cleaned and acid-etched aluminum parts are immersed in an electrolytic bath, where the electrolyte is usually a sulfuric acid solution. By the action of the electric current, a film of aluminum oxide is formed on the surface of the aluminum. The time and current density of anodizing affect the thickness and nature of the film. After anodizing, aluminum parts can be dyed to obtain different colors. Dyeing is usually done after the oxide film is formed. In order to improve the corrosion resistance of the oxide film, a sealing treatment is usually applied. Sealing can be done by hot water sealing or chemical sealing to fill the pores in the oxide film.

When oxidizing aluminum, it is necessary to ensure that the temperature and humidity of the operating environment are appropriate to ensure the consistency of the oxidation effect. Sulfuric acid concentration and temperature have an important influence on the formation of the oxide film and need to be strictly controlled. Due to the use of acidic and electrolytic solutions, operators should wear appropriate protective equipment such as gloves, goggles and protective clothing to prevent chemical damage to skin and eyes. The waste liquid generated from the oxidation process contains acids and must be disposed of properly in accordance with local environmental regulations. For dyeing and sealing treatment, appropriate materials and methods need to be selected to ensure the quality and performance of the final product. With the above procedures and precautions, aluminum oxidation treatment can be carried out effectively to enhance the performance and appearance of aluminum.

For the environment with corrosive gases, or the use of harsh environments, we usually use a fully sealed design, internal parts coated with three-proof paint and special sealing strips to ensure that the oxidized rectifier is not corroded and prolong the service life.

Anodic oxidation includes both aluminum anodizing and hard anodizing. Anodic oxidation (anodic oxidation), electrochemical oxidation of metals or alloys. The process of forming a layer of oxide film on aluminum products (anodes) under the action of an applied current in aluminum and its alloys under the corresponding electrolyte and specific process conditions. The so-called anodic oxidation of aluminum is an electrolytic oxidation process in which the surface of aluminum and aluminum alloys is usually transformed into a layer of oxide film, which has protective, decorative and some other functional properties.

Ordinary decorative anodizing requires a DC power supply voltage of usually 20V-24V, while hard anodizing usually has a higher voltage depending on the process, sometimes reaching 80V, 100V, 120V, etc. The current is determined by the size of the workpiece to be anodized, ranging from a few hundred amps to tens of thousands of amps.

Aluminum oxidation coloring, using artificial methods to make aluminum and its alloy products surface to generate a layer of oxide film (Al2O3) and apply different colors, in order to improve the wear resistance of aluminum, prolong the service life and increase the color and beauty. The basic process of oxidation coloring is aluminum surface treatment, oxidation, coloring and subsequent hydration sealing, organic coating and other treatment processes. The coloring methods of oxide film are chemical coloring, electrolytic coloring and natural coloring, etc.