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三种铝卷表面处理方法的优缺点

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  为了提高铝板表面的耐蚀性,铝型材经挤压后经过多种表面处理方法。常用的铝合金表面处理方法有阳极氧化一次、电泳涂装两次和粉末喷涂三次。这三种方法原理不同,各有优缺点。下面简要分析一下它们的优缺点。
  In order to improve the corrosion resistance of aluminium sheet surface, aluminium profiles are extruded and treated by various surface treatment methods. The commonly used surface treatment methods of aluminium alloy are anodizing once, electrophoretic coating twice and powder spraying three times. These three methods have different principles and advantages and disadvantages. Here is a brief analysis of their advantages and disadvantages.
  三种铝盘管表面处理方法的缺点:
  The shortcomings of three surface treatment methods for aluminium coil:
  1. 电泳涂装:电泳涂装如不严格满足各种工艺要求,如烘烤时间长、罐体污染、罐体成分不合格等。铝型材表面粗糙、起泡、针孔或收缩、清漆着色、光泽度低、漆膜不均匀,型材表面有裂纹等表面缺陷。

铝卷生产厂家
  1. Electrophoretic coating: If electrophoretic coating does not strictly meet various technological requirements, such as long baking time, contamination of the tank, unqualified components of the tank, etc. Aluminum profiles have surface defects such as rough surface, foaming, pinhole or shrinkage, varnish coloring, low gloss, uneven paint film and cracks on the profile surface.
  铝卷生产厂家
  Aluminum coil manufacturer
  2. 阳极氧化:氧化膜易与杂质混合变黄;材料容易粘在一起,使氧化色的表面不均匀,形成彩虹色,导致产品外观不良;表面和冷床易形成黑色。K或白色;电解液温度过高或电解时间过长,导致铝型材表面变形。白色不透明粉;在氧化过程中,如果型材下降,容易引起短路。在碱腐蚀过程中,如果硫酸浓度控制不好,会降低型材表面的耐腐蚀性。氧化膜表面也容易发生氧化。灰、黑或外观质量问题。
  2. Anodic oxidation: the oxide film is easy to mix with impurities and yellowing; the material is easy to stick together, so that the oxide surface is not uniform, forming a rainbow color, resulting in poor appearance of the product; the surface and cold bed are easy to form black. K or white; too high temperature of electrolyte or too long electrolysis time lead to surface deformation of aluminium profile. White opaque powder; in the oxidation process, if the profile falls, it is easy to cause short circuit. In the process of alkali corrosion, if the sulfuric acid concentration is not well controlled, the corrosion resistance of profile surface will be reduced. The surface of the oxide film is also prone to oxidation. Grey, black or appearance quality problems.
  3、粉末涂料:如果原材料质量不好,有灰尘或杂质混合,会在型材表面产生颗粒;压缩空气不干净,与油或水混合也会造成铝型材表面的收缩缺陷;不适当的匹配会影响铝制品的物理性能和耐化学性能,如硬度、耐冲击性和抗弯性;它也导致了外观较差的型材表面没有粉末和黄变。
  3. Powder coatings: If raw materials are not of good quality and mixed with dust or impurities, particles will be generated on the surface of profiles; if compressed air is not clean, it will also cause shrinkage defects on the surface of aluminium profiles when mixed with oil or water; improper matching will affect the physical and chemical properties of aluminium products, such as hardness, impact resistance and bending resistance; It also leads to powdery and yellowing on the surface of the profile with poor appearance.
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