Dissolution Mechanism of Intermetallic Layer by Iron Erosion in Aluminum-Based Molten Binary Alloys

Erosion testing was conducted on iron specimens in various aluminum-based molten binary alloys, and the correspondence between intermetallic compounds formed at contact interface thermodynamically stable phases examined. On basis of results, mechanism dominant factor dissolution layers were investigated. Although erosion ratio by Al–3%Mn alloy significantly small, ratios alloys Al–Si system great, comparison to those other melts. Meanwhile, identified EBSD corresponded based equilibrium calculation compositions analyzed EDS and/or pseudo phase diagrams aluminum alloy-Fe systems. In addition, there a positive correlation experimental rate apparent saturation solubility Fe melts diagrams. These results suggest that caused almost same as phenomena described Noyes-Whitney-Nernst equation, is affecting diffusion-controlled from solid-liquid interfaces under local equilibrium.