A Study of the Inhibition of Iron Corrosion by Glutamic Acid Derivatives Self-Assembled Films

2011 ◽  
Vol 415-417 ◽  
pp. 964-967 ◽  
Author(s):  
Zhe Zhang ◽  
Gang Yan ◽  
Le Ruan
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Glutamic Acid ◽  
Electrochemical Impedance ◽  
The Self ◽  
Iron Surface ◽  
H2so4 Solution ◽  
Iron Corrosion ◽  
Self Assembled ◽  
Glutamic Acid Derivatives

The Self-Assembled (SA) films of glutamic acid derivatives were prepared on the iron surface. Electrochemical impedance spectroscopy (EIS) and polarization techniques were used to investigate the protection abilities of these films against iron corrosion in 0.1 M H2SO4 solution. The results of EIS and polarization curves indicated that films of the glutamic acid derivatives were able to protect iron from corrosion effectively.

Study of Pt Nanoparticles Protected by 1-Dodecanethiol Self-Assembled Films on Iron Surface Using Electrochemical Methods,UV-Vis and XPS Measurements

2011 ◽  
Vol 239-242 ◽  
pp. 273-278
Author(s):  
Zhe Zhang ◽  
Le Ruan ◽  
Ming Zi Jia ◽  
Ji Qiong Jiang ◽  
Xing Shen Deng
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Impedance Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Pt Nanoparticles ◽  
The Self ◽  
Iron Surface ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Self Assembled

In this article, Pt nanoparticles protected by 1-dodecanethiol (DDT) were self-assembled on iron surface forming mixed self-assembled films. Those nanoparticles were prepared in aqueous solution and transferred from water phase to toluene phase. The self-assembled films of nanoparticles protected by DDT were prepared on iron surface. The nanoparticles were characterized by UV-vis spectroscopy. Electrochemical impedance spectroscopy (EIS), polarization curves, X-ray photoelectron spectroscopy (XPS) were applied to characterize the self-assembled films on iron surface.

scholarly journals Impact of oxygen contamination on the electrochemical impedance spectroscopy of iron corrosion in H2S solutions

2020 ◽  
Vol 164 ◽  
pp. 108302 ◽  
Author(s):  
Martien Duvall Deffo Ayagou ◽  
Gaurav R. Joshi ◽  
Thi Tuyet Mai Tran ◽  
Bernard Tribollet ◽  
Eliane Sutter ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Iron Corrosion ◽  
Oxygen Contamination

Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy

2012 ◽  
Vol 3 (3) ◽  
Author(s):  
Damena D. Agonafer ◽  
Edward Chainani ◽  
Muhammed E. Oruc ◽  
Ki Sung Lee ◽  
Mark A. Shannon
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Critical Voltage ◽  
Transfer Resistance ◽  
Low Frequencies ◽  
Prolonged Incubation ◽  
Voltage Range ◽  
Self Assembled

The electrochemical interfacial properties of a well-ordered self-assembled monolayer (SAM) of 1-undecanethiol (UDT) on evaporated gold surface have been investigated by electrochemical impedance spectroscopy (EIS) in electrolytes without a redox couple. Using a constant-phase element (CPE) series resistance model, prolonged incubation times (up to 120 h) show decreasing monolayer capacitance approaching the theoretical value for 1-undecanethiol. Using the CPE exponent α as a measure of ideality, it was found that the monolayer approaches an ideal dielectric (α = 0.992) under prolonged incubation, which is attributed to the reduction of pinholes and defects in the monolayer during coalescence and annealing of SAM chains. The SAMs behave as insulators until a critical potential, Vc, is exceeded in both cathodic and anodic regimes, where electrolyte ions are believed to penetrate the monolayers. Using a Randles circuit model for these cases, the variation of the capacitance and charge transfer resistance with applied dc potential shows decreased permeability to ionic species with prolonged incubation time. The EIS data show that UDT (methylene chain length n = 10), incubated for 120 h, forms a monolayer whose critical voltage range extends from −0.3 to 0.5 V versus Ag/AgCl, previously attained only for alkanethiol at n = 15. At low frequencies where ion diffusion occurs, almost pure capacitive phase (−89 deg) was attained with lengthy incubation.

Sign in / Sign up

Export Citation Format

Share Document