Corrosivity category
The corrosion protection class is a classification of environmental conditions according to ISO 9223, which indicates the corrosion load expected on metals in the atmosphere. The higher the class, the harsher the environment and the stronger the corrosion.
Physicochemical Mechanism of Action
The corrosion protection class refers to the environmental conditions in which metals are placed. These conditions can be affected by humidity, salinity, and temperature. The higher the class, the tougher the environment for the material.
Metallurgical Relevance & Welding Risks
The corrosion protection class directly affects the maintainability and service life of metals. In severe classes (e.g., class 4 or higher), corrosion can occur quickly, leading to cracks, wear, and potentially early replacement of components.
Workshop Practice & Action Instructions
For metals in severe corrosion protection classes, special welding is required. Use high-quality, corrosion-resistant materials and welding processes. Make sure the weld seam is well protected and covered to prevent corrosion. For severe classes (class 4 or higher), post-treatment like galvanizing or applying anti-corrosion paints is recommended.