来源：http://www.jndclyyxgs.com 发布时间：2020-02-25 13:28:14
The chemical conversion of aluminum and aluminum alloy is formed by the direct reaction of aluminum surface and chemical oxidant in solution. Chemical conversion can be divided into two categories according to its solution properties: basic and acid, and can be divided into oxide film, phosphoric acid film, chromate film and monophosphate chromate film according to its film-forming properties. The resulting membranes are collectively referred to as chemical conversion membranes.
Chemical conversion film is widely used. In addition to general protection, some conversion films are also decorative (varnish is required for appearance), and some can improve the bonding strength of the coating. After some chemical conversion treatment, the original conductivity can still be maintained, so this kind of film is also called conductive conversion film.
The chemical conversion process is simple in operation, simple in equipment, high in production efficiency and low in production cost. The obtained conversion film has a wide range of applications, and has a broad application prospect and promotion value.
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