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 sheets. Because the steel sheets are exposed to the outside, they easily 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.

Why Corrugated Metal Sheet is Rusty?

Steel structures, including beams and columns, are galvanized or painted, are not exposed to wind rain, and generally do not rust. However, corrugated metal sheets, especially the roof, often rain and rust after long use. Once it rains, the rust on the top 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, producing 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 corrupted. 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 do you deal with the corrugated metal sheet after rusting?

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, increasing 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, anti-corrosion renovation costs are undoubtedly much lower than 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, leakproofing, 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. An electric polisher can treat the metal sheet surface contaminated by oxides or attached to the old paint layer. 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 colored 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 colored 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 colored 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 colored 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, take care of your steel structure buildings!

Regular maintenance of corrugated metal sheets can extend the service life, ensure the safety of corrugated metal sheets, and keep them beautiful and clean.

The commonly used protective measures for corrugated metal sheets.

1. Regularly inspect the metal sheet, mainly checking the waterproof and fireproof functions, to discover and solve safety hazards early. Unique waterproof or fire retardant coatings for color steel sheets can also be used.
2. If corrosion or discoloration is found on the color steel surface, sanding, spraying, touch-up and other methods can be used to deal with it. If untreated, color steel will rust quickly and easily cause safety accidents.
3. Check the drainage of the roof. We must pay attention to the problem of water accumulation on roofs. Once found, it must be solved in time, and a drainage system can be used to solve it.
4. Anti-bird and anti-rat. Color steel buildings are susceptible to damage by birds and mice, and corresponding protective measures must be taken, such as spraying anti-bird and anti-rodent coatings.

Precautions for maintenance

1. Maintenance of colored steel sheets requires choosing the appropriate time and weather conditions to avoid care in rainy and snowy weather.
2. Maintenance of steel sheets requires appropriate tools and materials to avoid damage to the surface.
3. The maintenance has specific hazards to the human body, and protective equipment needs to be worn.

In short, as a commonly used building material, color steel sheet needs more attention from us in terms of maintenance and protection. Taking appropriate protective measures can maintain the beauty and safety of steel buildings and extend their service life. Corrugated metal sheets are unique for roofs and walls in steel structure buildings. Sandwich panels have a better thermal insulation effect and longer service life than ordinary single panels. Customers can choose according to their own needs.