The graph above shows how Corten steel changes over time. We can clearly see that as Corten steel weathers, the plate goes from a fresh bright orange color at 0.5 months to a deep dark brown color after 40 years. A lot of people like this weathered look, but most people don't realize that this weathering process doesn't stop on its own over the 100+ year life span of Corten steel. If you don't do anything about it, the corrosion layer will just keep getting deeper, and that'll mess up both how it looks and its structural integrity. So, what can we do to stop the weathering of steel finishes from getting worse? This guide's got the answers.
Here's the easy answer to why corten steel rust grows deeper every year.
In nature, the patina on Corten steel gets darker over time because of exposure to the air and moisture. At the same time, acid rain, coastal salts, and air pollutants react with the patina, speeding up the corrosion process. This causes the patina to change from a warm orange color to a dark brown and eventually a black color. Also, if the steel is exposed to sunlight, moisture, and air circulation unevenly, the patina can deepen unevenly. This can mess up the nice, even look that a lot of people like for their Corten steel fixtures.
Corten steel can be affected for a bunch of reasons because it needs the environment to form the protective oxide layer that gives it high corrosion resistance and density. So how do we "freeze" this process at some point without messing with the high performance of the Corten steel itself? We need to do this to get a good visual aesthetic or even extend the service life of the Corten steel. This requires human intervention.
How to stop Corten steel weathering?
You've got to use a top-notch sealant to put a stop to the weathering process of Corten steel at a certain point. Products like BROMOCO CT-7571 are made to lock in the look you want on Corten steel surfaces while protecting them in the long run.
Why should you use CT-7571 Corten Steel Sealer for Them?
CT-7571 is more than just a rust preventative — it's a comprehensive solution for maintaining and enhancing the finish of Corten steel. Here's why it's the preferred choice:
Keep it looking good
CT-7571 stops the natural weathering of Corten steel at its most attractive stage, whether you prefer the vibrant orange tones of early patina or the darker shades of mature rust. The sealer will permanently maintain the visual appeal of the finish by setting it in its current state.
Protects structural integrity
It forms a barrier that protects the steel from moisture and oxygen, which can lead to deeper rusting. CT-7571 is also UV and weather resistant, so it'll last for as long as the coating does with minimal maintenance.
Enhanced durability
CT-7571 shields steel from environmental contaminants, UV rays, and acidic conditions, which helps prevent patina cracking or uneven weathering over time.
Controlling the Aging Process in Corten Steel
Corten steel's beauty comes from its natural weathering process, but if you don't do anything, it can get deeper rusty and damaged. Using a sealer like CT-7571 can stop the weathering of Corten steel at the exact stage you want. If you've been wondering “How can I prevent further corrosion of Corten steel” or “What can I do to protect the surface of Corten steel?”you've got your answer. Take control of your Corten steel today and make sure it remains beautiful and durable for a long time.
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