Corrosion of Various Types of Stainless Steel in Chloroaluminate Melts

Abstract

The corrosion behavior of austenitic steels AISI 316L (analog of 03Kh16N15M3), 12Kh18N10T (analog of AISI 321) and 06KhN28MDT and ferritic and ferritic–martensitic steels 12Kh13 (analog of AISI 410), 08Kh17T (analog of AISI 439), and 16Kh12MVSFBR is studied in chloroaluminate melts at a temperature of 550°C. The corrosion rates of these steels in a KCl–AlCl₃ electrolyte are determined. The corrosion damage of the stainless steel surfaces is shown to have a continuous inhomogeneous character and to be characterized by etching off the most electronegative elements, namely, chromium, iron, and manganese.