Color steel plate is a kind of building material commonly used in metal sandwich panel buildings. It is often used in the enclosure of wall panels and roof panels of metal buildings. The appearance of the metal sandwich panel building is presented through the external envelope system, which is reflected in the wall panels. The roof panel of a metal building is a color steel plate or a metal sandwich panel of a metal panel. Therefore, the color of the metal sandwich panel building depends on the color of the color steel plate coating.
Color steel plate is a kind of plate produced after a series of treatments such as cold-rolled steel strip on the continuous unit. When designing the plate, the manufacturer also makes a variety of colors according to the needs of different users. Let’s learn about it below. The choice of the color of the color steel plate coating.
Selection of color steel coating color
The choice of color mainly takes into account the matching degree between the owner’s preference and the surrounding environment. However, from a technical point of view, there is more room for choice of light-colored paints, and some inorganic pigments with better durability can be selected. Moreover, the heat reflection ability of this kind of coating is relatively strong, and the temperature of the coating itself is relatively low in summer, which is also helpful to the longevity of the coating. Even if the coating of the color steel plate is discolored or pulverized, the small contrast between the light-colored coating film and the original color has little effect on the appearance.
And dark colors are more organic colors, if exposed to ultraviolet light, it is easy to fade, and the color will change in as little as 3 months. For color-coated steel sheets, the thermal expansion coefficients of the coating and the steel sheet are usually different, especially the linear expansion coefficients of the metal substrate and the organic coating are quite different. When the ambient temperature changes, the bonding interface between the substrate and the coating will change. Expansion or contraction stresses will occur and if not properly relieved, cracking of the coating will occur.
In addition, here are two misunderstandings in the current market:
One is that there is a lot of white primer. The purpose of using the white primer is mainly to reduce the thickness of the topcoat, because the normal anti-corrosion primer for construction is yellow-green, so it is necessary to have sufficient thickness of the topcoat.
The second is that the same project uses color-coated steel plates from different manufacturers and different batches. The color-coated steel plates seem to be consistent during construction, but after several years of sunlight, the color changes of different coatings and different manufacturers have different trends. It will lead to serious color difference.
You can choose the color of the color steel plate according to your actual needs. If you want to know more about the color plate, please contact us.
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