Chromium oxidation resistance
Chromium oxidation resistance forms a dense chromium oxide layer on the steel surface, which repels oxygen and prevents high-temperature corrosion.
Physicochemical mechanism
Chromium oxidation resistance comes from a dense chromium oxide layer forming on the steel surface. This happens when oxygen contacts the chromium and forms a stable oxide layer.
Metallurgical relevance & welding risks
Strong chromium oxidation resistance prevents oxygen from diffusing into the steel, which avoids corrosion and cracking at high temperatures. Without this property, the steel can be prone to corrosion and breakdown.
Shop practice & action items
To ensure chromium oxidation resistance, make sure the surface is clean before welding. Use high temperatures and short times during welding to stabilize the oxide layer. For high-temperature processes like TIG welding, additional chromizing may be needed.