摘要
利用交流阻抗技术和弱极化曲线拟合技术研究了工业纯铁在硫酸溶液及添加Ｃｌ-和十二烷基胺（ＤＤＡ）溶液中的电化学阻抗谱及极化曲线。结果表明ＤＤＡ在硫酸中缓蚀效应为覆盖效应。Ｃｌ-的加入提高了ＤＤＡ对铁的缓蚀效率，但未改变ＤＤＡ对铁的缓蚀机理。阻抗谱可用混合电位下的法拉第阻抗理论解释。
The Electrochemical Impedance Spectrum(EIS) of industrial pure iron at corrosion potential in 0. 5mol / L H2SO4 solution with and without addition of various concentrations of inhibitors were investigated. The results show that the EIS in the blank solution involves a capacitive are at high frequencise,a capadtive and a inductive arc at low frequencies. The feature of EIS in the solution with dodeylandne(DDA) is similar to that in the blank solution, while adding 0.1 mol/ LCl- into the solution the degenerates EIS to a single capacitive arc with much large poliarization resistance. The results also show that DDA in sulphuric acid is a covering effects and the EIS confirms the previously proposed theory of Faradaic admittance at mixed potential.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1995年第4期300-304,共5页
Corrosion Science and Protection Technology
基金
国家自然科学基金
