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Influence of Natural Environment in Different Regions on the Application of Color-coated Steel Plates

In the application of color-coated steel plates, there are many factors that will affect the application effect of color-coated steel plates. Next, let's take a look at the impact of the environment on the application of color-coated steel plates.


1. The natural environment (different regions) affects the color-coated steel plate


The selection of color-coated steel plates in different regions mainly considers the local wind and snow load and corrosive environment, and the wind and snow load mainly considers the safety factor of the building.


Although this is related to the mechanical properties of the color steel plate, it is more related to the shape and thickness of the profiled steel plate and the connection between the plates.


It is relatively difficult to quantitatively describe the corrosion environment of a region. There are many factors affecting the corrosion of color coated steel sheet, such as: temperature, humidity, temperature difference between day and night, sunshine time and sunshine intensity, rainfall and rainfall acidity, wind direction and speed, corrosive sedimentation things etc.


2. Factors affecting the corrosion resistance of color-coated steel sheets


They are coating type, coating thickness, coating supplier, coating type, coating thickness, pretreatment type, steel plate thickness, coating structure, etc.


3. Influence of construction design on corrosion of color-coated steel plate


Installation or processing quality: it is mainly reflected in whether the coating is damaged during processing, whether the coating is brittle at low temperature, and the damage caused by dragging the steel plate during installation.


Structural welding iron filings fall on the coating during installation, and roof panels are not cleaned after construction, which will cause material corrosion.


From the above introduction to the corrosion factors of color-coated steel plates, as well as the feedback from our users and the analysis of the results of exposure tests, our suggestions for the use of color-coated steel plates in different regions are as follows.


In the plateau (southwest and northwest) and low latitude regions (Guangdong and the south) with strong ultraviolet rays, the color-coated steel plate should choose durable coatings (PVDF coating, HDP coating, SMP coating, etc.).


In high-temperature and high-humidity areas (most places along the southern coast), materials with good corrosion resistance should be selected for coatings, and the thickness of coatings and coatings should at least meet the requirements of national standards.


The use of color-coated steel plates at the seaside requires thick-coated color-coated steel plates or relatively dense coatings. Because the chloride ion in seawater has a strong penetration ability, it can directly corrode substrate coating through thin coatings or non-dense coatings.


Of course, if the substrate is galvanized or galvanized, it is not recommended to use color-coated steel plates where seawater can splash.


In the industrial environment, the impact on color coating is mainly acid rain. These areas are concentrated in Hunan, Chongqing, Jiangxi and other areas of China. In connection with color coating using high zinc layer galvanized substrate, the color coating still needs to be thick and dense.


In other areas that do not belong to the above-mentioned areas, the choice of color-coated steel plates is relatively large, as long as it meets the international standards for color-coated steel.

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