Chlorination in the absence of oxygen
Dry corrosion of metals - Industrial cases: halogens

Corrosion of carbon steels remains limited in pure chlorine for temperatures below 150-200°C. Above that, a rapid increase is observed, corresponding to the volatilization of iron chlorides FeCl₃ and Fe₂Cl₆ . The addition of chromium or nickel, decreasing the alloy's iron content, reduces corrosion kinetics. Austenitic stainless steels can be used up to 320-430°C. Nickel, which forms a less volatile NiCl₂ chloride than FeCl₃ (table 1), and Ni-based alloys exhibit low corrosion rates up to 500°C and are widely used in these environments. Corrosion resistance, even at very high temperatures, is higher the higher the nickel content (figure