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分析什么材质的彩钢板建议?

返回列表 来源: 发布日期: 2020.06.27

分析什么材质的彩钢板建议?

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一。彩钢卷的基材可以是冷轧卷或热镀锌钢。虽然彩钢线圈的有机涂层部分具有良好的防腐效果,但有机涂层仍存在一些小的缝隙。空气和水可能进入有机涂层,从而导致基材生锈。因此,采用无涂层基材制成的彩钢板卷使用寿命短,刮伤后易散开,造成涂层剥落。彩钢卷的基材主要是镀锌钢板或镀锌合金钢板。
2。彩色涂料的生产工艺分为基材预处理、化学转化膜(非有机金属涂料)、有机非金属涂料。另外,有些生产线也有后涂工艺。
三。基材预处理:如以镀锌钢板为基材,生产后不直接进入彩涂工序,在运输过程中可能出现铁锈(白锈)、灰尘等污染。如果不能去除,则会影响彩色涂层的质量。彩涂辊成品的质量和各项理化性能与前处理密切相关。另外,镀锌生产后,涂油防锈,除油后再进行彩涂生产。
目前,大多数预处理方法是碱溶液脱脂。
四。化学转化膜:具有两个功能:一是进一步提高防锈能力;二是提高基材与涂层的附着力,提高基材的涂层性能。一般有三个步骤:一是磷化,在金属表面形成大量晶体,然后用磷酸盐溶液在金属表面形成磷酸盐膜;二是钝化密封,磷酸盐膜上还有一些孔,这些孔与铬酸盐反应形成保护膜。三是纯水洗涤,钝化液用脱盐水或去离子水洗涤
5个。有机涂层:有机涂层分为底漆和面漆。底漆不要求很高,可以用平滑的方式喷涂。但为了安全生产,底漆和面层漆一般采用反向涂刷。后涂工艺:后涂工艺包括印刷、压花、可剥保护膜、层压等,增加彩钢板的装饰性和保护性。此外,国外的一些后涂层工艺也被用于冷轧和镀锌生产线上,如矫直和矫直。

1. The base material of color steel coil can be cold-rolled coil or hot-dip galvanized steel. Although the organic coating part of color steel coil has a good anti-corrosion effect, there are still some small gaps in the organic coating. Air and water may enter into the organic coating, which may cause rust of the base material. Therefore, the color steel coil made of uncoated base material has a short service life and is easy to spread after scratches, resulting in Coating flaking. The base material of color steel coil is mainly galvanized steel plate or galvanized alloy steel plate.

2. The production process of color coating is divided into pretreatment of base material, chemical conversion film (non organic metal coating), organic non-metal coating. In addition, some production lines also have post coating process.
3. Substrate pretreatment: if the galvanized steel plate as the substrate does not directly enter a color coating process after production, it may appear rust (white rust), dust and other pollution during transportation. If these cannot be removed, the quality of the color coating will be affected. The quality and all physical and chemical properties of the finished color coated roll are closely related to the pretreatment. In addition, after galvanizing production, oil is applied for rust prevention, and the oil is removed before color coating production.
At present, most of the pretreatment methods are alkali solution degreasing.
4. Chemical conversion film: it has two functions: one is to further improve the anti rust ability; the other is to improve the adhesion between the base material and the coating, and improve the coating performance of the substrate. Generally, there are three steps: first, phosphating, forming a large number of crystals on the metal surface, and then forming a phosphate film on the metal surface with the phosphate solution; second, passivating and sealing, there are still some pores in the phosphate film, which react with the pores with chromate to form a protective film. The third is pure water washing, and the passivation liquid is washed with desalted or deionized water
5. Organic coating: the organic coating is divided into primer and finish. The primer is not required to be high and can be painted in a smooth way. However, for the sake of production safety, the primer and surface paint are generally painted in a reverse way. After coating process: after coating process includes printing, embossing, peelable protective film, lamination, etc., which increases the decorative and protective properties of color steel plate. In addition, some foreign post coating processes are also used in cold rolling and galvanizing production lines, such as leveling and straightening.

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