Alloy Oxidation Resistance
Alloy oxidation resistance describes how well a metallic material is protected against oxidation at high temperatures. Dense protective layers prevent oxygen attack.
Physical-Chemical Mechanism of Action
At high temperatures, the metal reacts with oxygen in the air and forms a dense protective layer on its surface. This layer prevents further oxygen from reaching the metal and allows oxidation to spread further.
Metallurgical Relevance & Welding Risks
Low oxidation resistance leads to faster corrosion and reduces the service life of the material. In the weld zone, a missing protective layer can allow oxygen to diffuse into the metal, causing cracks or distortion.
Workshop Practice & Action Instructions
To increase oxidation resistance, metals should be thoroughly cleaned before welding. At high temperatures, it is important to use a clean environment and possibly special protective agents to create a dense protective layer.