摘要
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。
Investigates the electrochemical corrosion behaviours of Fe-30Mn-(1～7) Cr and Fe-23Mn-5Cr alloys in different solutions by the anodic polarization technique. Binary Fe-(23～30)Mn alloys are difficult to passivate both in 3.5wt％NaCl and IM Na_2SO_4 solutions. With increasing Cr content of Fe-Mn-Cr alloys, the corrosion current density I_(corr) decreases, the corrosion potential E_(corr) increases and the anodic polarization curves in 1M Na_2SO_4 solution present a stable passivation region as Cr>5wt％. The beneficial action of Cr on the corrosion resistance of Fe-Mn is slightly superior to that of Al. Alloying Fe-(23～30)Mn alloys with chromium promotes the corrosionsresistance of alloys into the class of 9％ Ni steel.
出处
《大连铁道学院学报》
1993年第2期57-61,共5页
Journal of Dalian Railway Institute
基金
国家自然科学基金:59171021
中国科学院腐蚀科学开放实验室
关键词
电化学腐蚀
阳极极化
铁锰铬合金
electrochemical corrosion test
anodizing/Fe-Mn-Cr alloys
corrosion current density
