[China Aluminum Network] The chemical conversion of aluminum and aluminum alloys is formed by the direct reaction of the aluminum surface with the chemical oxidants in the solution. This process does not require the application of a voltage, which is also called chemical oxidation. Chemical conversion can be divided into alkaline and acidic two kinds according to the nature of its solution, and according to the nature of its film, there are oxide film, phosphate film, chromate film and chromate-phosphate film. The resulting layers are collectively referred to as chemical conversion films.
The chemical conversion film has a wide range of applications. In addition to its general protective function, the conversion film obtained in some process recipes also has a decorative effect (the outer surface needs to be coated with a varnish), and some can improve the combination with the coating. Strength; Some chemical conversion treatment can still maintain the original conductivity, so the film is also known as conductive conversion film.
The chemical conversion treatment process is simple in operation, simple in required equipment, high in production efficiency, low in production cost, and the application range of the conversion film obtained is a coating variety with broad prospects and promotion value.
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