Shandong color steel volume manufacturers: color steel volume of the color of the life of what impact?

Shandong color steel coil manufacturers talk to you about the color of color steel coil what is the impact on the life?

1. Color steel coil surface coating from the date of manufacture to the appearance of discoloration, chalking phenomenon of the time interval, affecting the coating of the original beautiful effect.

2. Limit life color steel volume rust perforation, can not be used.

Shandong color steel coil manufacturer said, color steel coil corrosion failure process: coating loss of zephyr-coating discoloration-coating broken-coating cracking-coating blistering-white embroidery/red rust-coating shedding-coating large area white embroidery-steel plate corrosion perforation-steel plate failure coating thickness.

(1) Porous structure coating From the microscopic point of view, the coating is porous structure. Water and corrosive media (chloride ions, etc...) in the air will invade through the weak part of the coating, causing corrosion under the film, and then the coating blisters and spalls.

(2) The thickness of the coating is selected according to the experimental results: the front coating 20M can effectively prevent the intrusion of corrosive media. As the anti-corrosion mechanism of primer and top coat is different, so the primer 5 microns, top coat 15 microns to balance the corrosion resistance of different parts of color steel coil.

Coating gloss:

(1) Light pollution high light surface glare, the high reflectivity of sunlight during the day will cause light pollution.

(2) Hidden trouble. High-gloss surface has a small coefficient of friction and is easy to slip. Roof construction is prone to safety hazards.

(3) When used outdoors, visual fatigue aging of color coated steel panels first indicates light loss. If maintenance is required, it is easy to distinguish between old and new steel plates, resulting in poor appearance; if the back paint is high-gloss, the room has a light that is easy to produce halos, resulting in visual fatigue. Experiments have shown that, in general, the color steel coil for construction is mostly used in low and medium gloss (30-40 degrees).

Color steel coil paint color:

(1) light color system from the application technology, light color paint has a variety of pigments to choose from. Inorganic coatings (such as titanium dioxide) with excellent durability are available, and the coating has a high heat reflection capacity (the reflection coefficient is twice that of the dark-colored coating). The temperature of the coating itself is relatively low in the summer, which contributes to prolonging the service life of the coating. In addition, even if the coating is discolored or chalked, the contrast between the light-colored film and the original color is very small and has little effect on the appearance.

(2) dark color system dark color (especially bright color) is mostly organic color, easy to fade under ultraviolet irradiation, short three months to change the color.

Shandong color steel coil manufacturers said, according to relevant test data, summer noon outdoor temperature is higher, white surface temperature than blue surface 10 degrees lower than black surface 19 degrees lower. Different colors have different ability to reflect sunlight.

1. At present, white primer is commonly used in China to reduce the thickness of top coat. Because the anti-corrosion primer for ordinary buildings is yellow-green (hence strontium chromate pigment), the topcoat must be thick enough to have good coverage. This is very dangerous for corrosion resistance. First the primer has poor corrosion resistance, then the topcoat is greatly reduced to less than 10 microns. This color steel coil looks shiny and corrodes in different places (notches, bent machined places, undercoat, etc.). Less than two years.

2. color steel coils from different manufacturers and batches are used for the same project. During construction, they look the same color. However, after several years of sun exposure, different paints and manufacturers have different color change trends, resulting in a serious color difference. There are too many examples. Even if the products are from the same supplier, it is highly recommended to order the same project at one time, as different paint suppliers may use different lot numbers for their products, increasing the likelihood of color differences.