EIS investigation of passive film formation on mild steel in oxalic acid solution

被引：0
作者：
A. Ashrafi
M. A. Golozar
S. Mallakpour
机构：
[1] Isfahan University of Technology,Department of Materials Engineering
[2] Isfahan University of Technology,Department of Chemistry
来源：
Journal of Applied Electrochemistry | 2008年 / 38卷
关键词：
Electrochemical impedance spectroscopy; Oxalic acid; Passive layer;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The properties of oxide films on mild steel formed anodically in aqueous solution containing oxalic acid were investigated by means of electrochemical impedance spectroscopy (EIS). The morphology of the passive layers at different stages of film formation was investigated using scanning electron microscopy (SEM). Passivation of mild steel in oxalic acid solution is a multi-stage process that occurs before passive layer breakdown. The influence of potential on the electrochemical behavior of the passive layer was also investigated. Depending on the passive layer potential, the EIS spectra obtained exhibited a one- or two-time constant system. This suggests the formation of either a one layer or two layer oxide film on the mild steel surface, depending on the passivation potential.
引用
收藏
页码：225 / 229
页数：4
相关论文
共 48 条
  • [1] Ahmad N(1996)undefined Synth Met 78 103-undefined
  • [2] Macdiarmid AG(1997)undefined J Appl Polym Sci 65 417-undefined
  • [3] Su W(1989)undefined J Appl Electrochem 19 401-undefined
  • [4] Iroh JO(1997)undefined J Electroanal Chem 429 81-undefined
  • [5] Schirmeisen M(1997)undefined J Appl Polym Sci 65 617-undefined
  • [6] Beck F(2003)undefined Iran Polym J 12 485-undefined
  • [7] Sazou D(2002)undefined Prog Org Coat 45 23-undefined
  • [8] Georgoios C(1999)undefined Electrochim Acta 44 3321-undefined
  • [9] Su W(1999)undefined Electrochim Acta 44 4655-undefined
  • [10] Iroh JO(1996)undefined J Electroanal Chem 416 179-undefined
12345