What is the weakness of Corten steel?

Fencing made of corten steel is an architectural application. Heterogenous coloring caused by atmospheric conditions and oxide stains is some of the weakness of corten steel. “Some circumstances require a solution to the inherent disadvantages of the Corten steel

Corten steel is characterized by its low maintenance, unlike, for instance, a paint coating. Over time, the surface oxide layer of weathering steels becomes more and more stable, unlike paint finishes, which gradually decompose due to atmospheric agents and thus require frequent maintenance.

Speaking of Corten Steel, specialized Corten Steel is used for proper functioning. Corten steel tubes one leading Manufacturer, Supplier & Stockist Of  S355J2WP+N Corten Steel Plate & Sheet.

One common issue with naked Corten steel is that the oxide is water soluble, particularly in the early stages of oxidation. Consequently, the rainwater that washes the steel surface also drags certain contents of dissolved oxide, which result in reddish or rust stains in the water deposition zones.

Especially on concrete surfaces, these stains are hard to remove. It is a well-known problem that gets softer over time as the patina ages and becomes more stable.

 

After the oxide has been stabilized, some treatments recommend applying varnish as a third stage. Using this varnish, we will modify the anticorrosion model of Corten steel so that it will behave as painted steel in the future, where the effectiveness of the protection will be determined solely by the capacity of the varnish layer to maintain the water tightness of the structural assembly, i.e. to isolate the steel surface from moisture.

Feature blisters will occur if the varnish layer is damaged or some areas are left unprotected allowing moisture to enter.

Feature blisters will increase progressively until the varnish is detached, chipped off, or exfoliated. This is the usual deteriorating process of any coated metal structure and the same model applies to the varnished Corten steel, with the peculiarity of the presence of a highly hygroscopic patina under the paint layer that will increase the speed of degradation.

In addition to iron and carbon, Cor-Ten steel contains copper, chromium, nickel, phosphorus, silicon, and manganese in small quantities and less than 5% of the total metallurgical composition. Cor-Ten’s strength and corrosion resistance make it such a popular choice. This is all possible because of the steel’s structural composition and the particular distribution and concentration of alloy elements. As a result, they reduce the carbon content, increase load capacity, and above all, provide exceptional corrosion resistance.

In spite of Corten steel’s impressive corrosion resistance, it also has some disadvantages that should be considered before using it

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