PPGI prepainted galvanized steel coil is a kind of building material. Its quality can not be reflected in the short term. Most users (owners) in the market still use the quotation as the leading factor to decide the selection of color steel coil. In fact, this is very unscientific. Although it is funded once, it has problems such as maintenance cost improvement and shortened service life.
Usually the industrial construction planning period is 15-20 years, and the color steel coils do not need to be replaced within the planning period. Shows a lot of the use of color steel coils. Usually Hengze color coated rolls have been used for more than 10 years, some even for nearly 20 years. So far, the color, coating and other functions have not changed much, and the color steel coils are intact. However, if the usual color coated steel plate is used, the service life is usually 7-8 years, or even shorter, and it needs to be replaced once during the planning period.
Due to the outstanding quality of color steel coils, the price of color steel coils on the market is several hundred to thousands of dollars more than the usual Hengze color coated coils. However, if the usual color steel coils are replaced once during the planned service life, the color is used. The cost of the coil is usually only 60% of the Hengze color coated coil. From this, the prepainted color galvanized coil price can be calculated at a price 66% higher than the price of the original Hengze color coated coil. This does not consider other influences, such as the impact on the corporate image, and the impact on the production when replacing maintenance.
Detailed description of the color steel coil profile coating, divided into topcoat, primer, coating, cold-rolled substrate, chemical film, back paint and so on.
A. Top coat of color steel coil: shields the sunlight and prevents the damage of the coating by ultraviolet rays; when the topcoat reaches the specified thickness, it can form a dense shielding coating film to reduce water permeability and oxygen permeability.
B. The color coat of the color galvanized coil: It is beneficial to strengthen the adhesion to the substrate, so that the paint film is not easy to be desorbed after the water is permeable, and the corrosion resistance is also improved, because the primer of the Hengze color coated roll is in the primer. Contains corrosion inhibitors such as chromate pigments to improve corrosion resistance.
C. Coating of color steel coil: The better coating is galvanized and galvanized aluminum. They have better corrosion resistance than galvanizing. This part has a great influence on the service life of the product.
D. Cold-rolled substrates for prepainted color galvanized coils: Using cold-rolled substrates, the properties of different cold-rolled substrates determine the mechanical properties of the coil, such as strength.
E. Chemical film of color steel coil: Increase the adhesion of the coating of color steel coil.
F. Back-coating of color steel coil: Consider whether the back side of the prepainted color galvanized coil is directly exposed or used as a composite board. If it is used as a composite board, the bonding property of the back paint and the pouring should be considered.