How do you keep corten steel from rusting?

Corten steel is designed to rust, and the rusted surface actually protects the underlying steel from further corrosion. However, if you want to slow down or prevent the rusting process, there are several things you can do:

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Apply a protective coating: You can apply a protective coating to the steel surface, such as a clear lacquer or a specialized protective coating designed for Corten steel. This will help prevent moisture from entering the steel and slow down the rusting process.
Keep the surface dry: Corten steel rusts faster in a wet environment, so keeping the surface dry will help slow the rusting process. If the steel is installed outdoors, make sure no water collects on the surface.
Avoid contact with salt water: Salt water accelerates the rusting process, so if Corten steel is used near the ocean, extra precautions may need to be taken to prevent the steel from coming into contact with salt water.
Use Rust Preventives: There are a number of rust preventives that can slow down the rusting process. These rust inhibitors can be applied to the surface of the steel to help prevent rusting.

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It is important to note that if a protective coating or inhibitor is applied to the surface of the steel, it may affect the appearance of the steel.Corten steel rusted surfaces are often prized for their distinctive appearance, so it is important to consider whether you are willing to sacrifice this aesthetic for greater durability.