How to Prevent Oxidation and Corrosion in Heat Resistant Steel Castings at High Temperatures?

Preventing oxidation and corrosion is crucial for the service life of heat resistant steel castings under extreme conditions. Our company ensures superior oxidation resistance through a two-pronged approach: material selection and heat treatment processes.

High Alloy Elements Strengthen the Oxide Film

Our castings typically contain a high proportion of chromium (Cr) and aluminum (Al). These alloying elements react rapidly with oxygen at high temperatures to form a dense oxide film. This oxide film is highly stable and effectively prevents further oxidation diffusion, thus protecting the internal metal from corrosion.

Optimized Heat Treatment Processes

By performing heat treatments (such as quenching or tempering) within specific temperature ranges, we can adjust the material's microstructure and eliminate internal defects. This not only improves the material's mechanical strength but also significantly reduces its corrosion tendency at high temperatures.

Precision Surface Machining

For particularly easily corroded components (such as radiant tubes or furnace rolls), we employ precision machining techniques to remove minute surface cracks or pores. These microscopic defects, if present, can become sources of corrosion. Precision machining can effectively prevent such problems.

Customized Protection Solutions

We not only provide finished castings but also customized protection solutions based on our customers' specific operating conditions (such as acidic or alkaline environments). By adding specific alloy components or surface treatments, we further enhance the corrosion resistance of our products.