Corrosion Inhibitor Addition
Corrosion Inhibitor addition blocks anodic or cathodic partial reactions on the metal surface, reduces the corrosion rate, and extends the service life of metal parts in corrosive environments.
Physicochemical mechanism of action
Corrosion Inhibitor addition refers to chemical additives that deposit on the metal surface. They block either the anodic (oxidation reactions) or cathodic (reduction reactions) partial reactions that lead to corrosion. This interrupts the chemical reaction between the metal and the corrosive medium.
Metallurgical relevance & risks during welding
The correct Corrosion Inhibitor addition is crucial for the hardness and corrosion behavior of the weld. Too little Corrosion Inhibitor can lead to increased corrosion, while too much can make it too hard and impair mechanical properties. It is important to use the right Corrosion Inhibitor in the correct dose to maximize the life of the metal.
Workshop practice & instructions
For successful Corrosion Inhibitor addition:
• Determine the appropriate Corrosion Inhibitor based on the metal used and the environment.
• Perform the addition in the correct concentration, usually between 0.1% and 1% of the weld pool.
• Monitor the temperature during welding to ensure the Corrosion Inhibitor remains effective.
• Avoid excessive addition, as this can lead to increased hardness and potential mechanical issues.