Investigation of Vanadium Oxidation States in Sulfuric Acid by Voltammetry and Electrochemical Impedance Spectroscopy

2015 ◽  
Vol 70 (1) ◽  
pp. 13-20 ◽  
Author(s):  
P. Vanysek ◽  
V. Novak ◽  
L. Chladil
Keyword(s):  
Sulfuric Acid ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Oxidation States

Polymerization of Aniline on Mild Steel and its Corrosion Protection

2011 ◽  
Vol 66-68 ◽  
pp. 817-821
Author(s):  
Abdul Amir H. Kadhum ◽  
Ahmed Y. Musa ◽  
Abu Bakar Mohamad ◽  
Mohd Sobri Takriff ◽  
Long Lynnyen
Keyword(s):  
Cyclic Voltammetry ◽  
Sulfuric Acid ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Corrosion Protection ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Metal Dissolution ◽  
Polyaniline Films

The production of polyaniline films on mild steel from sulfuric acid was carried out using cyclic voltammetry. Corrosion protection of the coating was observed in 3.5% NaCl using electrochemical impedance spectroscopy, (EIS) and potentiodynamic polarization measurements. Results showed that the polyaniline layer has the potential to protect mild steel by stabilizing the oxide layer formed on the steel surface and thus prevent the metal dissolution process.

Investigating the influence of hydrogen on stress corrosion cracking of 2205 duplex stainless steel in sulfuric acid by electrochemical impedance spectroscopy

2017 ◽  
Vol 35 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Chuanbo Zheng ◽  
Guo Yi
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Stress Corrosion ◽  
Duplex Stainless Steel ◽  
Stress Corrosion Cracking ◽  
Electrochemical Impedance ◽  
Corrosion Cracking ◽  
2205 Duplex Stainless Steel

AbstractAs a nondestructive and sensitive method, electrochemical impedance spectroscopy (EIS) can be used to investigate the passivation and breakdown of passive films on steel. In this study, EIS, combined with slow strain rate test and scanning electron microscopy, was employed to study the stress corrosion cracking (SCC) behavior of 2205 duplex stainless steel in 0.5 m sulfuric acid solution under hydrogen-charging conditions. Results showed that the corrosion resistance of passive film on the hydrogen-charged specimen was lower than that for the specimen with no hydrogen charge. Hydrogen-induced cracking was evident after the specimens had been charged for 24 h. The phase shift in EIS, calculated from frequencies between 0.1 and 10 Hz, could be used to monitor the SCC process.

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