EIS analysis on the corrosion resistance of X80 steel under AC interference in simulated soil solution

2021 ◽  
pp. ArticleID:210657
Author(s):  
Zhong Li ◽  
Keyword(s):  
Corrosion Resistance ◽  
Soil Solution ◽  
X80 Steel ◽  
Ac Interference ◽  
Eis Analysis

scholarly journals Investigation on Microstructure, Nanohardness and Corrosion Response of Laser Cladded Colmonoy-6 Particles on 316L Steel Substrate

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6183
Author(s):  
Jeyaprakash Natarajan ◽  
Che-Hua Yang ◽  
Sundara Subramanian Karuppasamy
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Oil And Gas ◽  
Steel Substrate ◽  
Corrosion Process ◽  
Corrosion Resistance Property ◽  
316L Steel ◽  
Eis Analysis ◽  
Stable Passive

316L steel is predominantly used in manufacturing the components of high-pressure boilers, heat exchangers, aerospace engines, oil and gas refineries, etc. Its notable percentage of chromium offers resistance against corrosion and is mostly implemented in harsh environments. However, long-term exposure to these components in such environments can reduce their corrosion resistance property. Particularly at high temperatures, the oxide film formed on this type of steel reacts with the chloride, sulfides, sulfates, fluorides and forms intermetallic compounds which affect its resistance, followed by failures and losses. This work is focused on investigating the hardness, microstructure and corrosion resistance of the laser cladded Colmonoy-6 particles on the 316L steel substrate. The cladded specimens were dissected into cubic shapes and the microstructure present in the cladded region was effectively analyzed using the FESEM along with the corresponding EDS mapping. For evaluating the hardness of the cladded samples, the nanoindentation technique was performed using the TI980 TriboIndenter and the values were measured. The potentiodynamic polarization curves were plotted for both the substrate and clad samples at 0, 18, 42 and 70 h for revealing the corrosion resistance behavior. In addition, the EIS analysis was carried out to further confirm the resistance offered by the samples. The surface roughness morphology was evaluated after the corrosion process using the laser microscope, and the roughness values were measured and compared with the substrate samples. The result showed that the cladded samples experience greater hardness, lower values of surface roughness and provide better corrosion resistance when compared with substrate samples. This is due to the deposition of precipitates of chromium-rich carbide and borides that enhances the above properties and forms a stable passive film that resists corrosion during the corrosion process.

Effect of AC interference on hydrogen evolution reaction of x80 steel

2020 ◽  
Vol 67 (2) ◽  
pp. 197-204
Author(s):  
JiaYu Zhou ◽  
Zili Li ◽  
JianGuo Liu ◽  
Xiao Xing ◽  
Gan Cui ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrochemical Impedance ◽  
Ph Value ◽  
Electrode System ◽  
Oxygen Absorption ◽  
Content Type ◽  
Tafel Polarization ◽  
X80 Steel ◽  
Ac Interference

Purpose The purpose of this paper is to quantify the influence of alternating current (AC) interference on hydrogen evolution reaction of X80 steel. Design/methodology/approach The hydrogen evolution potential was obtained by cathodic potentiodynamic polarization curve. The instantaneous potential under AC interference was obtained by high-frequency acquisition with three-electrode system. Electrochemical impedance spectroscopy and Tafel polarization curves were used to study the influence mechanism of AC interference on instantaneous potential. Findings It was concluded that the hydrogen evolution reaction could occur on X80 steel under AC interference. There were critical AC current densities of about 100 to 200 A/m2, beyond which the cathode reaction of X80 steel changed from oxygen absorption to hydrogen evolution. Besides the pH value, the initial polarization potential EZ and impedance module of the steel/electrolyte interface under AC interference were also the factors that affected the critical AC densities in different solutions. Originality/value This research quantified the hydrogen evolution capacity of X80 steel under AC interference, which could be applied to clear the effect of AC interference on hydrogen evolution reaction.

Effects of Hydrogen on Electrochemical Behaviors of X80 Steel in Simulated Soil Solution

2011 ◽  
Vol 335-336 ◽  
pp. 468-473 ◽  
Author(s):  
Chuan He ◽  
Xu Chen ◽  
Yang Xu ◽  
Zhi Yong Liu
Keyword(s):  
Soil Solution ◽  
Current Density ◽  
Polarization Resistance ◽  
Pipeline Steel ◽  
Charge Transfer Resistance ◽  
X80 Pipeline Steel ◽  
Transfer Resistance ◽  
Hydrogen Charging ◽  
Charging Time ◽  
X80 Steel

X80 pipeline steel specimens were treated by electrochemical hydrogen charging under various current density and charging time. The polarization resistance and corrosion rate of X80 steel were analyzed in Yingtan simulated soil solution under the different hydrogen charging conditions. The results showed that hydrogen accelerated anodic dissolution and enhanced corrosion sensitivity. With hydrogen in the steel, the charge transfer resistance and polarization resistance decreased, double electric layer capacitor and corrosion current increased. The effects were enhanced with the increase of hydrogen charging time and current density.

Effect of Applied Potentials on Stress Corrosion Cracking Susceptibility of X80 Pipeline Steel in Simulated Soil Solution

2010 ◽  
Vol 146-147 ◽  
pp. 920-925 ◽  
Author(s):  
Yuan Cheng ◽  
Hong Ying Yu ◽  
Li Xin Zhang ◽  
Ying Wang ◽  
Xu Meng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Stress Corrosion ◽  
Soil Solution ◽  
Stress Corrosion Cracking ◽  
Pipeline Steel ◽  
Corrosion Cracking ◽  
X80 Pipeline Steel ◽  
X80 Steel ◽  
Scanning Electron

The stress corrosion cracking susceptibility of X80 pipeline steel was investigated in a simulated soil solution using slow strain rate tensile (SSRT) tests. The different potentials were applied in the tests. The fracture surfaces were observed using scanning electron microscopy (SEM). The X80 steel was susceptible to SCC in simulated solution. The SCC susceptibility had no apparent change with the anodic potentials applied. The fracture mechanism was anodic dissolution. However, the SCC susceptibility increased with the decrease of the cathodic potentials obviously. The cracking was induced by the Hydrogen diffusing into the metal.

Effect of Potentials on Stress Corrosion Cracking of X80 Pipeline Steel in Simulated Soil Solution

2011 ◽  
Vol 197-198 ◽  
pp. 1549-1554 ◽  
Author(s):  
Yuan Cheng ◽  
Hong Ying Yu ◽  
Ying Wang ◽  
Xu Meng ◽  
Li Xin Zhang ◽  
...  
Keyword(s):  
Strain Rate ◽  
Stress Corrosion ◽  
Soil Solution ◽  
Anodic Dissolution ◽  
Stress Corrosion Cracking ◽  
Fracture Mechanism ◽  
Pipeline Steel ◽  
Corrosion Cracking ◽  
X80 Pipeline Steel ◽  
X80 Steel

The stress corrosion cracking (SCC) susceptibility of X80 pipeline steel, which was used in the Second West-East Gas Pipeline, was investigated in simulated soil solution of Xinzhou in Hubei province of China. The SCC susceptibility was studied using the slow strain rate tensile (SSRT) tests in which different potentials were applied. The fracture surfaces were observed using SEM. X80 steel was susceptible to SCC in simulated solution. The SCC was not serious with the anodic potentials applied. The fracture mechanism was anodic dissolution. But the SCC was affected obviously with different cathodic potentials because of the different influence of the hydrogen.

Influence of the Cathodic Charging Current on Electrochemical Behaviors of X80 Steel in an Simulated Acidic Soil Solution

2013 ◽  
Vol 750-752 ◽  
pp. 2179-2182
Author(s):  
Jie Zhang ◽  
Jing Li ◽  
Qian Hu ◽  
Feng Huang
Keyword(s):  
Soil Solution ◽  
Electrode Surface ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Acidic Soil ◽  
Anodic Process ◽  
Electrochemical Behaviors ◽  
Charging Current ◽  
X80 Steel ◽  
Cathodic Charging

The electrochemical behaviors of X80 steel under different charging current in an acidic soil solution were investigated by open circuit potential, potentiodynamic scan and electrochemical impedance spectroscopy. Results show that cathodic charging promotes the formation of corrosion product on the electrode surface, accordingly, the OCP changes slightly. The hydrogen ions on electrode surface are exhausted during the charging process, therefore the cathodic reaction is restrained meanwhile the anodic process iron dissolution increases. EIS result shows that the corrosion rate under OCP was inhibited by cathodic charging. However, the anodic process was enhanced by charging under-0.4 VSCE.

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