Chemistry

Difference Between Rust And Corrosion

The Key Difference Between Rust And Corrosion is that Rust and corrosion are two terms that are used to describe the same thing, but there is a difference between the two. Rust is the formation of iron oxide on the surface of an iron-based item.

This occurs when iron reacts with oxygen. Corrosion is actually the physical or chemical degradation of matter by chemical or biological agents. The difference between corrosion and rust can be confusing, and understanding the difference can be key to understanding the development of rust.

By being aware of the difference between corrosion and rust, you can determine what type of treatment you need to prevent the corrosion of your items.

What is Rust?

Rust is a coating of oxide as a result of contact with water and/or oxygen. Due to the exposure to oxygen, the metal begins to oxidize which makes the metal brittle.
The oxidation process can be prevented with the use of paint or lacquer which helps to slow down the reaction.
The video below shows the process of rusting in action.

What is Corrosion?

Corrosion is a natural process in which the surface of a material is altered and its properties are changed because of the effect of external agents (called the corrosive agents) or because the surface has been damaged.

 

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Major Differences Between Rust and Corrosion

  • Rust only affects metals. It is mainly made up of iron and its alloys (such as steel).
  • Corrosion affects both metals and non-metals. Shafts and hides can also be included.
  • Coating the surface of the material is the most effective way to prevent corrosion.
  • For rust, the most effective preventive measure is galvanizing. It is also important to minimize contact with moisture.
  • In rust, the end product is red or orange, but in corrosion, there can be a variety of colors from blue to green.
  • The causes of rust are air and moisture.
  • Rust only occurs when the metal surface is exposed to both air and moisture.
  • Corrosion, on the other hand, can be caused by air, moisture, or both.

Similarities Between Rust And Corrosion

  • Both are oxidative reactions.
  • The material surface coating method prevents corrosion and rust.
  • Both of these processes are generally unwanted chemical reactions.

Conclusion

In general, the difference between rust and corrosion is small, but it is there. In most cases, it is safe to assume that anti-corrosion coatings prevent rust and that other types of corrosion are prevented by anti-corrosion coatings.

This certainly applies to our Secoa Metal Finishing products. Our protective coatings are ideal for preventing many types of corrosion, including rust. If you want to know more about our corrosion resistance and anti-rust coating.

 

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