The service life of steel structure buildings is more than 50 years. The roof and wall panels of prefabricated steel buildings usually use corrugated metal sheet. Because the steel sheets are exposed to the outside, they are easy to rust after 20 years. So the article will introduce how to deal with rusty color steel sheets.

In recent years, there have been more and more steel structure buildings, and some problems of steel buildings have also become prominent. Especially the rust problem of the corrugated metal sheet has been plagued by customers. After the metal sheet is rusted, it will become more and more severe if it is not refurbished or replaced.

Steel structures, including beams and columns, are galvanized or painted and are not exposed to wind, rain and generally do not rust. However, corrugated metal sheet, especially the roof, often rain and rust after a long time of use. Once it rains, the rust on the roof will be affected by the environment, and the rain will be oxidized and decomposed. In addition, the rain will flow along with the roof metal sheet, which will produce rust marks. Thus, over time, the roof will rust in a large area.

In addition, the color metal cladding is iron-containing. Once it comes into contact with acid, alkali, and organic solvents, it will produce a chemical reaction to produce iron dioxide, which is rust. If the color steel sheet is not maintained, holes will appear when the color steel sheet is seriously corroded. Then it will cause the roof to leak. There is also a long period of wind and sun, and after the surface paint layer is aging, the oxygen in the air will directly contact the substrate, causing rust.

How to deal with the corrugated metal sheet after rusted?

If the problem of rust is found, it is necessary to do anti-corrosion renovation in time. Otherwise, the corrosion rate of the corrugated metal sheet will accelerate, and the appearance of rust holes will cause rain leakage, which will increase the difficulty and cost of maintenance. The metal sheet of the steel structure building is rusty. In addition to the anti-corrosion refurbishment treatment, new corrugated metal sheets are replaced. However, the cost of anti-corrosion renovation is undoubtedly much lower than that of new construction. If the rust is not too severe, finding a professional manufacturer for anti-corrosion renovation is recommended.

The construction of anti-corrosion renovation isolates the substrate from direct contact with the air through paint. The substrate is in a completely sealed environment so that it cannot react with oxygen in the mood to achieve anti-corrosion and rust prevention.

Anti-corrosion renovation involves roof sealing, leakproof, waterproofing, installation, maintenance, and other issues. If you are not a professional, do not repair it privately. The surface of the color steel sheet should be smooth before anticorrosion construction, and welding slag, burrs, rust, oil stains, etc., need to be cleaned up. The metal sheet surface that is contaminated by oxides or attached to the old paint layer can be treated with an electric polisher. The base layer of the processed color steel sheet should be sprayed with the primer in time, and the interval should not exceed five hours. After refurbishment, pay attention to good maintenance, which can better extend the life of the steel structure building.

How to avoid steel sheet rust

Of course, to prevent the color steel tiles from rusting, they must be cleaned and maintained regularly. Therefore, it is best to check them once a year to find the problems early. When cleaning, avoid scratches on the surface of the color steel tile, do not use bleaching or corrosive cleaning agents, and avoid using steel wire or wear-resistant products to prevent damage to the protective layer on the surface of the color steel tile. The branches and leaves on the factory’s roof should also be cleaned up in time to avoid the backlog adding unnecessary load to the building, and the rotting leaves are likely to erode the surface of the color steel tile.

Rust on the roof of the steel structure buildings seriously affects the appearance and causes serious consequences such as water leakage. Regular maintenance, early detection of problems, and timely anti-corrosion refurbishment treatment will reduce maintenance costs and extend the service life of steel structure workshops. Please, therefore, pleased care of your steel structure buildings!