In the view of CAMELSTEEL, the impacts of use environment on prepainted GI sheet can be analyzed in two aspects:
1. To select shell plate of prepainted GI sheet shall consider regions under normal situation. Yet the impact of microenvironment shall also be counted. Such as whether corrosive medium in surroundings will fall down the space enclosing structure of plant including gas and sulfur dioxide, etc. discharged by boiler, what’s the leakproofness of plant and whether the plant is hot and humid, etc.
Corrosive gas will coagulate on prepainted GI sheet meeting with cold air in outdoor. This will accelerate the generation of regional corrosion and shall be avoided.
2. Consider the inner plate or back coating. That’s to say inner plate in roof structure is easier to be corroded compared with inner plate in wall surface. Yet the indoor environment or input of environmental protection device will directly impact the service time of prepainted GI sheet.
Metal buildings comprise almost half of low-rise, non-residential construction, and a large number of these buildings use prepainted GI sheet for both the roof and wall panels. With the proper selection of the paint system, careful building design and regular maintenance, prepainted GI sheet can provide a long and trouble-free service life.
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