The application range of coated steel plates in the construction industry is wide, the working conditions are harsh and changeable, and the construction investment is large. The requirements for the service life of the coated steel plates vary with the types of buildings, regional environmental conditions, aesthetic standards and economic effects. very large. However, from the actual economic situation in my country and the understanding and requirements of the service life of the application of color-coated panels in the construction industry, it can be roughly classified into the following categories:
① Decorative service life. It refers to the appearance of fading, cracking, partial shedding and other defects of the laminated board, which affects the image and aesthetics of the building. It has not yet reached the extent that the coating film loses its protective effect.
②The service life before refurbishment. It refers to the appearance of most of the defects such as delamination and rust spots on the coated board, which affects the use time of further corrosion of the substrate of the coated board.
③ Service life. Refers to the long-term use of the coated board without refurbishment until the service life of severe corrosion occurs.
The above-mentioned type ① life actually refers to the time before the coating film in the foreign data is seriously chalked, or the general life of the color film factory and the laminated board production factory. As the application department of the film-coated board, in addition to the need for Class ① life, it should also take into account the practicability of Class II life prediction as a basis for estimation. It can be seen from the examples of the application of the film-coated panels in Baosteel Phase I and Phase II projects that the service life of the film-coated panels has already exceeded the service life of Class ①. Severity of class life. It should be pointed out that although the service life of the membrane-clad panels for construction mainly depends on the quality of the type of membrane-clad panel materials, other influencing factors should not be ignored, such as the structure, nodes, and installation of the membrane-clad panel components, which must be properly handled and synchronized. Protection, the play of the inherent life of the film-coated board.
(1) The film-coated coil (film-coated board) is a product produced by a special continuous production process in a special production factory, and the product quality must meet the inspection standards.
(2) There are many kinds of coatings and color filters of the laminated board, which should be considered according to the use environment and use requirements, comprehensive and economic factors.
(3) The service life of the film-coated board (the service life of building products) should be determined according to many factors such as different industrial or civil buildings, different environmental conditions, different primary and secondary positions of use functions and decorative functions, and different investment capabilities and capital recovery requirements. Decide on the choice of laminate.
(4) Correctly analyze the performance data of the film-covered board provided by the manufacturers of film-covered boards, the manufacturers of film-covered board products, and the research institutes of film-covered boards in various countries or regions, in order to understand the operating positions, responsibilities, interests and scientific attitudes of the institutions and other factors. make a choice.
