There are many factors that affect the corrosion resistance of the color coated plate, including the type, thickness, type, level and thickness of the coating, the environmental conditions for use, and the mechanical processing, transportation, storage,
construction, installation and maintenance after construction. Today, we mainly talk about the influence of substrate, coating type and application environment on the corrosion resistance of color coated plate!
The influence of using environment on corrosion resistance of color plate is mainly described from these points:
1. When the temperature is high, the coating will soften, the corrosive medium will be easy to adhere, the oxygen
content in the substrate and high-temperature water will be increased, and the corrosion speed will be accelerated under a certain temperature.
2. The substrate corrosion at the humidity notch and processing damage belongs to electrochemical corrosion,
and the corrosion battery (i.e. electrochemical circuit) is not easy to form at low humidity.
3. The condition that the temperature difference is large and easy to condense and form galvanic corrosion on the exposed metal. In addition, large temperature
difference also leads to frequent cold and hot deformation of the coating, which will accelerate the aging and loosening of the coating, and the external corrosive medium is easy to penetrate into the substrate.
4. Sunlight UV spectrum belongs to
high frequency ray, which has more destructive power than low energy spectrum. X-ray can penetrate, γ - ray can break chemical bond and produce free charged ions, which are fatal to organic matters. Therefore, it can be seen from the above that the time
and intensity of sunlight affect the structural stability of the coating, especially in the areas with strong ultraviolet.
5. Heavy rain and high acidity will definitely corrode steel. However, the rainfall has a dual effect on the wall panel and
roof panel with large slope, which can clean the steel plate surface and wash away the surface corrosion; however, for the roof panel with low slope and the part with poor drainage, the rainfall is large and easy to cause corrosion.
6. The wind
direction is similar to the water, and often comes together. It is a test for the connection part of materials, because the wind will cause the connection part to loosen, and the rainwater will penetrate into the interior of the building.
corrosives, such as chloride ions, sulfur dioxide, etc., accelerate the corrosion, and most of them occur in coastal areas and areas with serious industrial pollution (such as power plants, smelters, etc.).
8. The orientation and slope towards the
building affect the sunshine time, thus affecting the durability of the coating. The slope also affects the settling time of corrosion medium or dust on the steel plate.
Tianwu color board has always been focusing on the field of high-end color
board customization. According to the use environment, design life, structural molding and customers' unique needs, personalized customization can meet customers' diversified needs and improve the competitiveness of downstream customers' products. We
always adhere to the business philosophy of "based on quality, committed to the letter" and are committed to the production of high-quality environmental protection and energy-saving color plate. The products involve 18 series, such as PVDF fluorocarbon
color plate, PVDF fluorocarbon color plate, color coated steel coil performance and application, HDP high weather resistant color plate, SMP silicon modified polyester color plate, PE ordinary polyester color plate, antistatic color plate, antibacterial
color plate, thermal insulation color plate, self-cleaning color plate, etc.