The ternary-based Fe-24Mn-3Cr alloy has superior mechanical properties based on an attractive combination of high strength and ductility, with long-term environmental stability in highly corrosive environments compared to conventional ferritic steel alloys. This study reports that the environmental instability caused by the rapid electrochemical corrosion kinetics on the surface of conventional high Mn-bearing ferrous alloys could be overcome by a combination of high Mn–low Cr-balanced Fe and their synergistic interactions. In contrast to Cr-free Mn-bearing alloys, the high Mn–low Cr-bearing alloy showed comparatively lower corrosion kinetic parameters, without a continuously increasing trend, and higher polarization resistance according to electrochemical polarization and impedance spectroscopy measurements. Moreover, the rate of degradation caused by erosion–corrosion synergistic interaction under erosion–corrosion dynamic flow conditions was the lowest in the high Mn–low Cr-bearing alloy. These surface-inhibiting characteristics of the alloy were attributed primarily to the formation of a bilayer scale structure consisting of inner α-Fe_2−xCr_xO₃/outer Fe_xMn_3−xO₄ on the surface.

与传统的铁素体钢合金相比，三元基 Fe-24Mn-3Cr 合金具有优异的机械性能，这是基于高强度和延展性的有吸引力的组合，在高腐蚀性环境中具有长期环境稳定性。该研究报告称，传统高锰铁合金表面快速电化学腐蚀动力学引起的环境不稳定性可以通过高锰-低铬平衡铁及其协同相互作用的组合来克服。与不含 Cr 的 Mn 合金相比，根据电化学极化和阻抗谱测量，高 Mn-低 Cr 合金显示出相对较低的腐蚀动力学参数，没有持续增加的趋势，以及更高的极化电阻。而且，在侵蚀-腐蚀动态流动条件下，由侵蚀-腐蚀协同相互作用引起的降解率在高锰-低铬合金中最低。合金的这些表面抑制特性主要归因于由内部 α-Fe 组成的双层鳞片结构的形成_{2- x} Cr _x O ₃ /表面上的外Fe _x Mn _{3- x} O ₄。