為了提高鋁板表面的耐蝕性，鋁型材經(jīng)擠壓后經(jīng)過多種表面處理方法。常用的鋁合金表面處理方法有陽極氧化一次、電泳涂裝兩次和粉末噴涂三次。這三種方法原理不同，各有優(yōu)缺點(diǎn)。下面簡要分析一下它們的優(yōu)缺點(diǎn)。
　　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.
　　三種鋁盤管表面處理方法的缺點(diǎn):
　　The shortcomings of three surface treatment methods for aluminium coil:
　　1. 電泳涂裝:電泳涂裝如不嚴(yán)格滿足各種工藝要求，如烘烤時(shí)間長、罐體污染、罐體成分不合格等。鋁型材表面粗糙、起泡、針孔或收縮、清漆著色、光澤度低、漆膜不均勻，型材表面有裂紋等表面缺陷。

　　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.
　　鋁卷生產(chǎn)廠家
　　Aluminum coil manufacturer
　　2. 陽極氧化:氧化膜易與雜質(zhì)混合變黃;材料容易粘在一起，使氧化色的表面不均勻，形成彩虹色，導(dǎo)致產(chǎn)品外觀不良;表面和冷床易形成黑色。K或白色;電解液溫度過高或電解時(shí)間過長，導(dǎo)致鋁型材表面變形。白色不透明粉;在氧化過程中，如果型材下降，容易引起短路。在堿腐蝕過程中，如果硫酸濃度控制不好，會(huì)降低型材表面的耐腐蝕性。氧化膜表面也容易發(fā)生氧化?；?、黑或外觀質(zhì)量問題。
　　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:如果原材料質(zhì)量不好，有灰塵或雜質(zhì)混合，會(huì)在型材表面產(chǎn)生顆粒;壓縮空氣不干凈，與油或水混合也會(huì)造成鋁型材表面的收縮缺陷;不適當(dāng)?shù)钠ヅ鋾?huì)影響鋁制品的物理性能和耐化學(xué)性能，如硬度、耐沖擊性和抗彎性;它也導(dǎo)致了外觀較差的型材表面沒有粉末和黃變。
　　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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