铝卷是铸轧机经过压延，拉弯角加工后，进行飞剪的金属产品，它的表面有一层氧化膜，可以起到很好的保护卷材的作用，但有时我们会发现氧化膜存在颜色不均的情况。这是怎么回事呢？下面，铝卷加工厂家就给大家简单介绍一下卷材表面氧化膜不均匀的原因及预防方法吧。
Aluminum coil is a metal product that is processed by casting and rolling mill after rolling and angle bending and flying shear. Its surface has a layer of oxide film, which can play a good role in protecting the coil. However, sometimes we find that the oxide film has uneven color. What's the matter? Next, the aluminum coil processing manufacturer will briefly introduce the causes and prevention methods of uneven oxide film on the surface of the coil.
1、工艺操作在工件碱性蚀刻处理不完整，原本的氧化膜部分存在污垢；碱性蚀刻后立即处理，表面仍为碱性；在转移过程中工件接触异物。
1. The alkaline etching treatment of the workpiece in the process operation is incomplete, and the original oxide film part has dirt; Immediately after alkaline etching, the surface is still alkaline; The workpiece contacts foreign matters during transfer.
预防方法：在生产过程中要严格保证合金铝卷工艺的完整性，才能生产出更好的产品。
Prevention method: During the production process, the integrity of the alloy aluminum coil process must be strictly guaranteed to produce better products.

2、摆动在插槽中工作面积过大，在氧化膜上产生的颜色不一致。
2. The working area of the swing in the slot is too large, and the color produced on the oxide film is inconsistent.
预防方法：氧化工件回转起伏小，可以安静的处置，但是当溶液温度过低时容易出现地图状花斑，显得不自然。
Prevention method: The oxidation workpiece can be handled quietly because of its small fluctuation in rotation, but when the solution temperature is too low, it is easy to appear map-like spots, which appears unnatural.
3、加工包覆层被破坏的部分时，虽然表层是高质量的铝材料，但是内层却是杂铝，二者在质量以及性能上差别比较大，因此氧化后会产生“白癜风”状斑点。
3. When processing the damaged part of the coating, although the surface layer is made of high-quality aluminum material, the inner layer is made of aluminum. The quality and performance of the two are quite different, so the oxidation will produce "vitiligo" spots.
预防方法：材料严格把控，减少或清除杂铝。
Prevention method: material shall be strictly controlled to reduce or remove aluminum impurities.
以上是对于铝卷表层氧化膜不均匀的原因及预防方法的介绍，希望可以对您有所帮助。您可以来我们网站咨询了解更多相关的事项！
The above is an introduction to the causes and prevention methods of uneven oxide film on the surface of aluminum coil. I hope it can help you. You can come to our website Consult for more relevant matters!