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Everything you need to know about metal corrosion

A shiny metal roof stands on top of a structure you probably spent a fortune on, doing its job of protecting men, material, and machinery from the adversaries of nature. In a perfect world, this would stand true for years, but let’s face it, metal roofs get corroded more often and quickly than we want them to. 

Corrosion is the process by which the elements of nature attack and damage metal structures. The most common form of corrosion is rust. Any iron metal structure exposed to adverse weather conditions like moisture and rain is bound to suffer from rust corrosion. 

What exactly is rust corrosion? How is it caused?

Rusting is an electrochemical process that attacks metal surfaces exposed to electrolytes. Rusting causes the expansion of oxides which causes damage to the structure that is under attack.

The roofs are made of flat sheets of steel that are cut to size. The joints are the potential weak points where rust can set in. Iron, water, and oxygen are three elements that need to be present for rusting. When iron combines with the oxygen in water, it creates iron oxide or rust on any iron or steel surface.

Rust can damage strong steel structures if water is allowed to penetrate the cracks and faults in exposed metal. The oxygen dissolves in water to form a layer of rust which corrodes the metal over time. This process is aggravated by acid rain and saltwater along the sea coast. Protecting metal structures from rust is essential by taking necessary precautionary measures.

What are the different types of corrosion?

Corrosion is not limited to iron and its alloys. Rust is usually red, orange, or black, while metals exposed to chloride suffer from green rust. 

Impure gases and liquids can damage metallic minerals and result in acidic agent corrosion. Galvanic corrosion occurs when two metals with different charges sit adjacent. The anodic metal has an accelerated corrosion rate compared to the other metal. 

Flow-accelerated corrosion affects rooftops due to their exposure to wind and rain. When exposed to weather elements, the exposed metal can get corroded easily. High winds and high activity levels inside the building can cause a high degree of tensile stress on the roof. This can cause stress corrosion cracking, which can damage the wall. Regular vibrations can cause minor structural cracks, which can be aggravated by rain.

How to prevent roof corrosion: 

  • Using a protective barrier coating to protect your roof from getting damaged due to exposure to water and moisture.
  • The screws used to hold the roof should be of extremely high quality and made of corrosion-resistant metal to prevent the structure from rusting.

 Presenting the Roofix Advantage

Here is where Roofix self-drilling screws offer you peace of mind. Roofix screws are coated with rust shield coating. It is a proprietary three-layer coating for extra corrosion resistance. The primary cost is zinc, followed by mechanical plating and topped with an electropolyseal V coat that gives 1000 hours of SST protection. This innovative three-layered coating ensures that the base metal is corrosion-resistant, which protects the life of the roofing metal sheet.

The use of corrosion-resistant screws like Roofix ensures the longevity of the building. It reduces the need for expensive repairs and protects the structure, men, and machinery from the ravages of nature. It is critical to ensure that the roof structure is corrosion-resistant by using better quality materials, for the strength of the building is dependent on the roof’s safety.

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