摘要
利用阳极极化曲线、俄歇电子能谱(AES)以及X射线光电子谱(XPS)测试技术研究Fe-25Mn和Fe-24Mn-4Al-5Cr钢分别在1 mol/L Na_(2)SO_(4)溶液和30%NaOH溶液中的钝化行为、钝化膜的成分及钝化膜的结构变化,得出Mn化合物结构对Fe-Mn基钢钝化膜耐蚀性的影响规律。研究结果表明:在1 mol/L Na_(2)SO_(4)溶液中,Fe-25Mn钢处于活化溶解状态,Fe-24Mn-4Al-5Cr钢则呈现钝化状态,钝化膜中Mn元素贫乏,Al、Cr元素富集;钝化膜主要由致密的Al_(2)O_(3)和Cr_(2)O_(3)组成,结构疏松的Mn_(2)O_(3)发生溶解,降低了Fe-Mn基钢钝化膜耐蚀性。在30%NaOH溶液中,Fe-25Mn钢表现出与Fe-24Mn-4Al-5Cr钢相近的钝化能力,钝化膜中只出现Mn元素的富集,结构致密的Mn(OH)_3是钝化膜的有效保护组分,显著提高了Fe-Mn基钢钝化膜的耐蚀性。
The anode polarization curve,Auger electron spectroscopy(AES)and X-ray photoelectron spectroscopy(XPS)were used to study the passivation behavior of Fe-25Mn and Fe-24Mn-4Al-5Cr alloys in 1 mol/L Na_(2)SO_(4) solution and 30%NaOH solution,the composition of the passivation film and the structural changes of the passivation film.The effect of Mn compound structure on corrosion resistance of the Fe-Mn base steel passivation film was obtained.The results show that in 1 mol/L Na_(2)SO_(4) solution,the Fe-25Mn alloy is activated and dissolved,while Fe-24Mn-4Al-5Cr alloy is passivated.Mn element is poor in the passivated film,while Al and Cr elements are enriched.The passivated film is mainly composed of dense Al_(2)O_(3) and Cr_(2)O_(3),while Mn_(2)O_(3) with loose structure is dissolved.In 30%Na0H solution,the passivation ability of the Fe-25Mn alloy is similar to that of the Fe-24Mn-4A1-5Cr alloy.Only Mn element is enriched in the passivation film.Mn(OH),with dense structure is an effective protective.
作者
朱雪梅
吴之栋
刘明
ZHU Xuemei;WU Zhidong;LIU Ming(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《大连交通大学学报》
CAS
2023年第4期104-108,共5页
Journal of Dalian Jiaotong University
