When selecting roofing materials for facilities in the chemical industry, coastal areas, and seafood processing plants, the corrosion resistance of plastic-steel roofing tiles is the most critical factor for decision-makers. This characteristic directly determines the overall service life of the roofing structure and the amount of maintenance costs that can be saved each year.
If the wrong materials are selected, the existing roof will have to be torn off and rebuilt within just a few years, and the financial losses resulting from this work stoppage will be enormous.
Corrosion Protection for PVC-Coated Steel Roof TilesHow does it work?
The surface of these PVC-coated steel roofing tiles features a fluororesin coating, which is characterized by its resistance to chemical degradation in acidic or alkaline environments with a pH range of 2 to 12.
Field data from coastal areas with high salt fog levels show that, ten years after installation, the wall panels exhibit no signs of rust or peeling, and their color retention rate remains above 90 percent. This performance metric far exceeds that of color-coated steel roofing products of the same specifications.
However, the cut edges are a weak point. This is because the edges were already sealed during prefabrication at the factory. However, after secondary cutting is performed on-site, if the cut edges are not recoated with edge sealer, the cut areas will be the first to show signs of chalking and deterioration within two to three years. This is the root cause of many accidents and project failures at construction sites.
What type of roof tiles should be chosen for a workshop to ensure durability?
For environments such as chemical industrial parks and acid washing workshops, we recommend that you prioritize selectingunplasticized polyvinyl chloride (uPVC or rigid PVC), Why is that?
This is because ordinary color-coated steel roofing sheets will rust through in such harsh environments in just two or three years, leading to leaks; and the subsequent repair costs alone would already exceed the price difference between the materials at the time of purchase. For seafood processing plants or salt chemical plants in coastal areas, the rationale for choosing this material is exactly the same.
When working with a limited budget, PVC roofing tiles can still be a valuable option; however, because they have relatively poor UV resistance, they are not recommended for outdoor environments that are exposed to direct sunlight over long periods of time.
When used in industrial roofing applications, PVC-coated steel roofing tiles do indeed demonstrate superior corrosion resistance; however, the key to this lies primarily in two aspects. The first aspect is to considerFluorocarbon CoatingTo determine whether this craftsmanship is of high quality and has been done properly, the second key point is to ensure that every cut edge is properly sealed during installation. If you include these two requirements in the contract terms during the procurement and acceptance phase, you’ll have virtually nothing to worry about during subsequent use.
Keywords: Corrosion Protection for PVC-Steel Roofing Tiles
