Hello, I'm Xiaobian. Do you know color steel plate? Today, I'd like to make a detailed analysis for you, hoping to help you.
Color selection of color steel plate coating: the selection of color is mainly to consider the matching with the surrounding environment and the owner's hobbies. However, from the perspective of application technology, there is a large choice of light
color paint. Inorganic pigments with superior durability (such as titanium dioxide) can be selected. Moreover, the paint has strong thermal reflection ability (the reflection coefficient is twice that of dark paint) and the temperature of the coating
itself in summer Relatively low, which is beneficial for the coating life extension.
In addition, even if the coating is discolored or powdered, the contrast between the light color coating and the original color is small, and the effect on the
appearance is not significant. However, most of the dark colors (especially the more bright colors) adopt organic colors, which are easy to fade when exposed to ultraviolet light, and change color in a short period of 3 months. For color coated steel
plate, the thermal expansion rate of coating and steel plate is usually different, especially the linear expansion coefficient of metal substrate and organic coating is quite different. When the ambient temperature changes, the interface between substrate
and coating will have expansion or contraction stress, if not properly released, the coating will crack.
In addition, here are two mistakes of choice in the domestic market:
One is tat there are a large number of white primers in China. The
purpose of using white primer is to reduce the thickness of the top coat, because the corrosion-resistant primer for normal buildings is yellow green (so there is strontium chromate pigment), and it must have enough thickness of the top coat.
other is that color coated steel plates of different manufacturers and batches are used in the same project for construction engineering, which seems to have the same color in construction. But after several years of sunlight, the color change trend of
different coating manufacturers is different, resulting in serious color difference. There are too many examples. Even products from the same supplier are strongly recommended to be ordered at the same time for the same project, because products from
different coating suppliers may be used for different batches, which increases the possibility of color difference.