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用阳极极化技术研究了Fe-30Mn-(1～7)Cr与Fe-23Mn-5Cr合金在不同水溶液中的电化学腐蚀行为。Fe-(23～30)Mn二元合金在3.5wt％NaCl与1M Na_2SO_4中均难以钝化。随Fe-Mn合金中Cr含量的增加,自腐蚀电流密度Icorr减小,腐蚀电位Ecorr增大,当铬含量大于5％时,在1MNa_2SO_4溶液中的极化曲线呈现稳定的钝化区,铬改善Fe-Mn合金腐蚀抗力的作用略强于铝。以(5～7)wt％Cr合金化Fe-(23～30)Mn合金,可以使其抗腐蚀性能提高至9％Ni的水平。
The electrochemical corrosion behavior of Fe-30Mn- (1 ~ 7) Cr and Fe-23Mn-5Cr alloys in different aqueous solutions was investigated by anodic polarization. Fe- (23-30) Mn binary alloys are hard to passivate in 3.5wt% NaCl and 1M Na_2SO_4. With the increase of Cr content in Fe-Mn alloy, the self-corrosion current density Icorr decreases, and the corrosion potential Ecorr increases. When the chromium content is more than 5%, the polarization curve in 1MNa_2SO_4 solution shows a stable passivation zone and chromium improves The effect of corrosion resistance of Fe-Mn alloy is slightly stronger than that of aluminum. The corrosion resistance of Fe- (23-30) Mn alloy can be improved to 9% Ni by (5 ~ 7) wt% Cr alloying.