碳钢在N-甲基二乙醇胺介质中的电化学阻抗谱研究

CORC > 厦门大学 > 2007年第13卷

	碳钢在N-甲基二乙醇胺介质中的电化学阻抗谱研究; Study on Electrochemical Impedance Spectroscopy of Carbon Steel Eroded in Methyldiethanolamine Solution
	韦冬萍 ; 胡荣宗 ; 潘丹梅 ; 黄维雄 ; 董瑞 ; WEI Dong-ping ; HU Rong-zong ; PAN Dan-mei ; HUANG Wei-xiong ; DONG Rui
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract8674.shtml
	2007-11-28
关键词	热稳定性盐 N-甲基二乙醇胺电化学阻抗谱碳钢腐蚀 heat-stable salts methyldiethanolamine electrochemical impedance spectroscopy carbon steel corrosion
英文摘要	应用电化学阻抗谱(EIS)研究碳钢在N-甲基二乙醇胺(MDEA)介质中的腐蚀行为.实验表明,未经预阴极活化处理的碳钢表面存在氧化膜,溶解氧促使它腐蚀速率增大,经活化处理去除氧化膜后则相反.在不含热稳定性盐(HSS)的MDEA溶液中,碳钢的腐蚀性随MDEA浓度的增加呈先上升后下降趋势;而在HSS高含量的溶液中,其腐蚀性则随MDEA浓度的增加而单调下降.在含有HSS模拟溶液中,碳钢的阳极极化EIS随极化电位由低到高分别出现感抗、负阻抗以及Warburg阻抗响应等特征,对应于孔蚀、活化状态向钝化状态过渡以及进入钝化的趋势,腐蚀反应的阴极过程表现为电化学反应和扩散传质混合控制,阳极过程为电化学反应控制.; Corrosion behavior of carbon steel in methyldiethanolamine(MDEA) solution was investigated by Electrochemical Impedance Spectroscopy(EIS).The results were showed that the corrosion rate of carbon steel in solution containing dissolved oxygen is higher than that in solution removed of dissolved oxygen before cathodic activation.They were reversed after cathodic activation.The corrosion rate is increased at first and then decreased when the concentration of MDEA is increased in the blank solutions.In the simulated solutions containing quantities of!heat-stable salts(HSS),the corrosion rate is decreased monotonously with increase of the MDEA concentration.As anodic polarization potential is increased,the EIS of carbon steel in HSS simulated solution showed characteristics of inductive shrinkage,negative impedance and Warburg-response,which implied pitting corrosion,transition from active state to passive state and passive state,respectively.The rate of cathodic reduction is determined by both electrochemical reaction and diffusion process.The rate-determining step of the anodic dissolution is electrochemical reaction.; 作者联系地址：厦门大学化学化工学院化学系现代分析科学教育部重点实验室,厦门大学化学化工学院化学系现代分析科学教育部重点实验室,厦门大学化学化工学院化学系现代分析科学教育部重点实验室,厦门大学化学化工学院化学系现代分析科学教育部重点实验室,厦门大学化学化工学院化学系现代分析科学教育部重点实验室福建厦门361005,广西民族大学化学与生态工程学院,广西南宁530006,福建厦门361005,福建厦门361005,福建厦门361005,福建厦门361005; Author's Address: 1.Department of Chemistry and the Key Laboratory of Analytical Science of the Ministry of Education,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;2.College of Chemistry and Ecological Engineering,Guangxi University for Nationalities,Nanning 530006,Guangxi,China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/58039]
专题	2007年第13卷
推荐引用方式 GB/T 7714	韦冬萍,胡荣宗,潘丹梅,等. 碳钢在N-甲基二乙醇胺介质中的电化学阻抗谱研究, Study on Electrochemical Impedance Spectroscopy of Carbon Steel Eroded in Methyldiethanolamine Solution[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract8674.shtml,2007.
APA	韦冬萍.,胡荣宗.,潘丹梅.,黄维雄.,董瑞.,...&DONG Rui.(2007).碳钢在N-甲基二乙醇胺介质中的电化学阻抗谱研究.http://electrochem.xmu.edu.cn/CN/abstract/abstract8674.shtml.
MLA	韦冬萍,et al."碳钢在N-甲基二乙醇胺介质中的电化学阻抗谱研究".http://electrochem.xmu.edu.cn/CN/abstract/abstract8674.shtml (2007).