Color coated steel coil/sheet is a product made of cold rolled steel and galvanized steel as substrate, pre-treated with the surface (degreasing, cleaning, chemical conversion treatment), coated with paint by continuous method (roller coating method), baked, and cooled.
In the trade process of the color coated steel coil/sheet, we are often asked the question: we want to use the color coated steel sheet to build a plant, how long can this color coated sheet guarantee the use of time? At the same time, we ask for a warranty, which puts forward the requirements for the service life of the color coated sheet.
In the use of the color coated steel coil/sheet, all aspects of the factors may affect its service life, and because the use of color coated steel sheet and the use of environmental conditions are different, so the factors affecting its service life are more. According to the use function, the service life of color coated steel coil/sheet can be divided into the following categories.
(1) Decorative service life, refers to the color of steel sheet surface fading of the main body, chalking, cracking, coating local shedding, and other defects, the image of the building and the aesthetic impact, but has not yet reached the degree of use of the coating blockbuster loss of protective effect.
(2)The service life of coating refurbishment, refers to the use time when most of the defects such as delamination and rust spots appear on the surface of the sheet, causing further corrosion of the substrate.
(3) Limit service life, which refers to the color coated steel sheet without renovation long-term use, until the emergence of serious corrosion, has been unable to use the time.
According to our common colored sheet types and normal use of environmental perspective, the service life of color coated steel sheet for construction can be rough as follows.
Decorative service life: 8 to 12 years.
Renovation service life: 12 to 20 years.
Ultimate service life: 20 years or more.
The above is a small summary of the factors affecting the service life of color coated steel coil/sheet, hope this article can help you have a better understanding of color coated steel sheet when buying.