The localized corrosion properties of a series of iron-based metallic glasses with a rough composition of 50Fe-18Cr-2Mn-9Mo-2W-15B-4C have been studied in chloride-containing solutions over a range of temperatures.  Excellent resistance to pitting corrosion is observed in 0.6M NaCl in the fully amorphous state. Pitting and crevice stabilization potentials were also predicted from experiments conducted on the same alloys in low pH halide-containing solutions. These were created both artificially through the use of bulk HCl solutions and naturally using the artificial pit method. The predicted critical pitting and crevice potentials in the absence of initiation were related to the potentials E*, E_T and E_crevice taken as the sum of the corrosion potential and overpotential required to achieve a critical pit stabilizing current density in a simulated acidified pit environment with and without accounting for the presence of pit and crevice IR drop. Exceptional localized corrosion resistance can be rationalized to be influenced by at least three factors: the large concentrations of Cr, Mo, and W, etc. in solid solution, minimization of surface defects, and several different possible roles of minor and trace alloying elements such as boron, carbon, yttrium and silicon on transition metal oxidation under active dissolution in acidic solutions.