鋁和鋁合金的化學(xué)轉(zhuǎn)化是鋁表面與溶液中的化學(xué)氧化劑直接反應(yīng)形成的。化學(xué)轉(zhuǎn)化按其溶液性質(zhì)可分為堿性和酸性兩大類，按其成膜性質(zhì)可分為氧化膜、磷酸膜、鉻酸鹽膜和單磷酸鉻酸鹽膜。所得的膜統(tǒng)稱為化學(xué)轉(zhuǎn)化膜。
　　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.

　　化學(xué)轉(zhuǎn)化膜被廣泛應(yīng)用，除了起到一般的保護(hù)作用外，有些轉(zhuǎn)化膜通過工藝配方獲得還具有裝飾作用(外觀需要涂上清漆)，有些可以提高涂層的結(jié)合強(qiáng)度;經(jīng)過一些化學(xué)轉(zhuǎn)化處理后仍能保持原來的導(dǎo)電率，所以這種薄膜又稱導(dǎo)電轉(zhuǎn)化膜。
　　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.
　　化學(xué)轉(zhuǎn)化工藝操作簡(jiǎn)單，所需設(shè)備簡(jiǎn)單，生產(chǎn)效率高，生產(chǎn)成本低，獲得的轉(zhuǎn)化膜應(yīng)用范圍廣，具有廣闊的應(yīng)用前景和推廣價(jià)值的鍍膜品種。
　　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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