Intermetallic Compounds Formation during 316L Stainless Steel Reaction with Al-Zn-Si Coating Alloy

Steel products are coated with Aluminum (Al) and Zinc (Zn) alloys to improve their corrosion properties. Bulk steel in batches; however, sheets by a continuous hot-dip galvanizing process. guided into out of the molten Al-Zn-Si (AZ) bath help stainless-steel rolls, known as guiding, sink rolls. These rolls subjected excessive surface AZ and, hence, replaced frequently. The deterioration immersed has been long-standing issue industry. In this study, 316L (SS) rods alloy at 600 °C. immersion time varied from 1 day 7 days under static melt conditions iron (Fe)-saturated bath. Microstructural analysis SS samples revealed two distinct intermetallic compound (IMC) layers forming between substrate alloy. IMC layer (AL-1) formed 2 (AL-2), growing thickness 68 µm 120 within 5 immersion. AL-2, which AL-1 after 24 h immersion, then grew up 150 an uneven trend. is composed Fe2Al5 that AL-2 FeAl3 were predicted FactSage thermodynamic analysis. Crack development layers, disintegration bath, key findings study. A drastic hardness increase was observed because produce hard brittle roll surface.