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How to Properly Clean Corten Steel – A Complete Guide

How to Properly Clean Corten Steel

Corten steel is a type of steel alloy that is designed to rust and form a protective layer on its surface. This layer helps protect the steel from corrosion, rust, and other forms of damage. Unfortunately, due to its unique composition, corten steel can be difficult to clean without damaging it. Fortunately, with the right knowledge and supplies, cleaning your corten steel need not be a daunting task.

What You’ll Need

Before you begin cleaning your corten steel, you’ll need to gather some supplies. Firstly, you’ll need a soft-bristled brush or piece of cloth for scrubbing—any abrasive materials may damage the corten steel’s protective layer. Additionally, you’ll need a mild detergent or soap for loosening dirt and grime, as well as some water for rinsing off the soap residue afterward.

Cleaning the Corten Steel

Once all your supplies are gathered, it’s time to start cleaning! Begin by lightly dampening down the area of the corten steel with water (you don’t want it so wet that it’s dripping). Then mix one part detergent/soap with five parts water in a bucket or bowl and stir until suds appear. Dip your brush into this mixture and then gently scrub away any dirt or grime on the surface of the corten steel using circular motions. Once all visible dirt has been removed, rinse off any remaining soap residue using clean water—you may want to use a hose for this, depending on how large an area you’re cleaning.   Finally, allow your corten steel to air dries completely before moving on to any further maintenance activities such as painting or rustproofing.


Keeping your corten steel looking its best requires regular maintenance and cleaning—but it doesn’t have to be difficult! With just a few simple steps and some basic supplies like detergent/soap and water, you can get rid of any dirt or grime that has built up on the surface over time without damaging the protective layer of rust that makes this type of material so great in the first place. So next time your corten steel needs some attention, don’t forget these tips!

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