Effect of soft cations on carbon steel corrosion in chloride media

2018 ◽  
Vol 36 (4) ◽  
pp. 395-402 ◽  
Author(s):  
Sudip Das ◽  
Prince Kumar Baranwal ◽  
Prasanna Venkatesh Rajaraman
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Chloride Solution ◽  
Electrochemical Impedance ◽  
Reaction Pathway ◽  
Critical Role ◽  
Steel Corrosion ◽  
Electrical Equivalent Circuit ◽  
Initial Ph ◽  
Eis Measurements

AbstractThe effect of soft cations (Na+, K+, NH4+) on the corrosion behavior of carbon steel in chloride (Cl−) media was investigated using various electrochemical and nonelectrochemical techniques. Data revealed that the corrosion rate is higher in the case of ammonium chloride solution following the order NH4+>K+>Na+. The polarization and electrochemical impedance spectroscopy (EIS) measurements indicated a significant influence of cations on both the corrosion rate and the mechanistic reaction pathway of carbon steel dissolution in Cl− media. The EIS measurement showed two time constants in all the cases. Electrical equivalent circuit was employed to model the EIS data. The surface morphology and the corrosion products were also analyzed. It was found that the hydration energy of cations and the initial pH of the solution play a critical role in describing the effect of cations present in Cl− media on carbon steel corrosion.

Effect of Sulfate Ions on the Corrosion Behavior of Steel in Concrete Using Electrochemical Methods

2010 ◽  
Vol 163-167 ◽  
pp. 3049-3054 ◽  
Author(s):  
Jin Jie Shi ◽  
Wei Sun
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Chloride Solution ◽  
High Performance ◽  
High Performance Concrete ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Sulfate Solution ◽  
Cyclic Polarization ◽  
Sulfate Ions

The effect of sulfate ions on the corrosion behavior of steel in ordinary Portland concrete (OPC) and high performance concrete (HPC) were investigated. Steel corrosion was evaluated by means of corrosion potential (Ecorr), linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and cyclic polarization (CP). The electrochemical results indicated that, compared to the pure chloride solution, the presence of sulfate ions in the chloride solution both reduced the time to corrosion initiation and lead to an increase in corrosion rate of steel in OPC specimens; however, the sulfate ions had negligible effect in HPC specimens. Furthermore, the corrosion rate of steel exposed to chloride solution was higher that to the sulfate solution both in OPC and HPC specimens.

scholarly journals Corrosion Behavior of API-X120 Carbon Steel Alloy in a GTL F-T Process Water Environment at Low COD Concentration

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 707
Author(s):  
Dina Ewis ◽  
Ahmed Gomaa Talkhan ◽  
Abdelbaki Benamor ◽  
Hazim Qiblawey ◽  
Mustafa Nasser ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Immersion Time ◽  
Rotation Speed ◽  
Electrochemical Impedance ◽  
Water Environment ◽  
Protective Layer ◽  
Steel Corrosion ◽  
Process Water ◽  
Effect Of Temperature

The effect of temperature, time and rotation speed of FT-GTL process water on the corrosion rate of API X-120 carbon steel was investigated. Electrochemical impedance spectroscopy and potentiodynamic polarization techniques were used to determine the carbon steel corrosion rate under temperatures ranging from 293 to 323 K and rotation speed of 0, 500, 1000, 2000 rpm when the immersion time was 0.5, 1, and 2 h. The corrosion rate increased with temperature and rotation speed but decreased with immersion time. SEM, XRD, and XPS analyses of the corroded surfaces confirmed the formation of iron oxide and ferric oxide as the main components of the protective layer.

scholarly journals Practical and Theoretical Study on the Inhibitory Influences of New Azomethine Derivatives Containing an 8-Hydroxyquinoline Moiety for the Corrosion of Carbon Steel in 1 M HCl

2018 ◽  
Vol 34 (6) ◽  
pp. 3016-3029 ◽  
Author(s):  
A. El-Yaktini ◽  
A. Lachiri ◽  
M. El-Faydy ◽  
F. Benhiba ◽  
H. Zarrok ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Density Functional ◽  
Electrochemical Impedance ◽  
Density Functional Theory Method ◽  
Steel Corrosion ◽  
Experimental Results ◽  
Chemical Parameters ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Inhibition Ability

The inhibition ability of a new Azomethine derivatives containing the 8-hydroxyquinoline (BDHQ and MDHQ) towards carbon steel corrosion in HCl solution was studied at various concentrations and temperatures using weight loss, polarization curves and electrochemical impedance spectroscopy (EIS) methods. The experimental results reveal that BDHQ and MDHQ are efficient mixed type corrosion inhibitors, and their inhibition efficiencies increase with increasing concentration. The adsorption of these inhibitors on mild steel surface obeys Langmuir isotherm. Quantum chemical parameters are calculated using the Density Functional Theory method (DFT) and Monte Carlo simulations. Correlation between theoretical and experimental results is discussed.

scholarly journals The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective

2021 ◽  
Vol 1201 (1) ◽  
pp. 012079
Author(s):  
S B Gjertsen ◽  
A Palencsar ◽  
M Seiersten ◽  
T H Hemmingsen
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Organic Acid ◽  
Carbonic Acid ◽  
Acid Corrosion ◽  
Iron Concentration ◽  
Critical Factor ◽  
Steel Corrosion ◽  
Carbon Steels ◽  
Corrosion Rates

Abstract Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to investigate how the corrosion rates on carbon steel is affected by acids typically present in the transported pipeline fluids. This investigation may contribute to the development of improved models. In a series of experiments, the corrosion rate differences for pure CO2 (carbonic acid) corrosion and pure organic acid corrosion (acetic acid and formic acid) on X65 carbon steel were investigated at starting pH values; 4.5, 5.3, or 6.3. The experiments were conducted in deaerated low-salinity aqueous solutions at atmospheric pressure and temperature of 65 °C. The corrosion rates were evaluated from linear polarization resistance data as well as mass loss and released iron concentration. A correlation between lower pH values and increased corrosion rates was found for the organic acid experiments. However, the pH was not the most critical factor for the rates of carbon steel corrosion in these experiments. The experimental results showed that the type of acid species involved and the concentration of the undissociated acid in the solution influenced the corrosion rates considerably.

Phenylcoumarin Glucoside as a Natural Inhibitor in the Protection of Low Carbon Steel Against Corrosion

MRS Advances ◽  
2017 ◽  
Vol 2 (62) ◽  
pp. 3909-3915
Author(s):  
Héctor M. Barbosa Cásarez ◽  
Araceli Espinoza Vázquez ◽  
Francisco J. Rodríguez-Gomez
Keyword(s):  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Low Carbon ◽  
Low Concentrations ◽  
Natural Inhibitor ◽  
Polarization Studies

AbstractPhenylcoumarin glucoside (4-PC) is a compound extracted from the plant Hintona latiflora and was studied as inhibitor for AISI 1018 steel corrosion in 3% NaCl solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, which may find application as eco-friendly corrosion inhibitors. The 4-PC provides inhibitor properties that protect AISI 1018 low carbon steel against corrosion at low concentrations (5 ppm) obtained by EIS. Polarization studies showed that the inhibitor was of mixed type. The inhibition efficiency by the two electrochemical techniques shows similar results. The inhibitor adsorption was demonstrated to be a combined process (physisorption and chemisorption) according to the Langmuir isotherm.

scholarly journals Electrochemically Synthesized Poly(2-Aminobenzenesulphonic Acid) – An Efficient Protection for Carbon Steel Corrosion

2019 ◽  
Vol 35 (2) ◽  
pp. 678-683
Author(s):  
Sini Varghese Cheruvathur ◽  
Joby Thomas Kakkassery ◽  
Vinod Raphael Palayoor ◽  
Binsi M. Paulson ◽  
Ragi Kooliyat
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Polymeric Coating ◽  
Spectral Studies ◽  
Protection Efficacy ◽  
Efficient Protection ◽  
Ft Ir ◽  
Hcl Medium

The corrosion protection efficacy of electrochemically synthesized poly(2-aminobenzenesulphonic acid) (P2ABSA) on carbon steel in 1.0 M HCl was investigated by electrochemical impedance spectroscopy, Tafel polarisation, scanning electron microscopy (SEM) and FT-IR spectral studies. The polymeric coating was prepared on the steel surface using cyclic voltammetry. Investigations established that P2ABSA effectively prevent the metal dissolution in HCl medium. Polarisation studies revealed that this polymer hinder both anodic and cathodic process of corrosion appreciably. The structures of the chemically and electrochemically synthesised polymers were compared using IR spectroscopy. Morphology of the steel surface confirmed the intact response of P2ABSA on steel surface treated with HCl.

scholarly journals Electrochemical Impedance Spectroscopy Evaluation of Organic Coating on Mild Steel

2018 ◽  
Vol 7 (3.11) ◽  
pp. 30
Author(s):  
Zailelah Zainoldin ◽  
Hadariah Bahron ◽  
Mohamad Kamal Harun ◽  
Syaidah Athirah Dzolin
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Organic Coating ◽  
Electrical Equivalent Circuit ◽  
Mild Steel Surface ◽  
Electro Oxidation ◽  
Nyquist Plots ◽  
Eis Measurements ◽  
Voltammetric Technique

Electro-oxidation of 4-hydroxybenzalaniline in alkaline solution on mild steel surface was successfully carried out using cyclic voltammetric technique. Results demonstrated that brownish colour appeared on the mild steel surface after the cycle of voltammetric study. The presence of film was confirmed by the EIS measurement whereas the Nyquist plots obtained from EIS measurements were fitted with suitable electrical equivalent circuit. The coated mild steel exhibit better polarization resistance than uncoated mild steel.  

scholarly journals The Effect of Achyranthes aspera Extracts on Mild Steel Corrosion in Industrial Water Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Chikkur B. Pradeep Kumar ◽  
Kikkeri N. Mohana
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Steel Corrosion ◽  
Charge Transfer Resistance ◽  
Water Medium ◽  
Industrial Water ◽  
Transfer Resistance ◽  
Achyranthes Aspera ◽  
Eis Measurements

Achyranthes aspera (AA) extracts were studied as corrosion inhibitor for mild steel (MS) in industrial water medium using mass loss and electrochemical techniques. The results of the study revealed that AA extracts inhibit MS corrosion through adsorption process following Langmuir adsorption isotherm model. The protection efficiency increased with increase in inhibitor concentration and decreased with temperature. The electrochemical impedance spectroscopy (EIS) measurements showed that the charge transfer resistance increases with increase in the concentration of AA extracts. The polarization curves obtained indicate that AA extracts act as mixed type of inhibitor. Scanning electron microscopy (SEM) was used to analyze the surface adsorbed film.

The Electrochemical Characteristics of Corrosion Scale on P110 Carbon Steel

2011 ◽  
Vol 287-290 ◽  
pp. 2332-2338
Author(s):  
Jian Miao ◽  
Shi Dong Zhu ◽  
Qiang Wang ◽  
Yao Rong Feng ◽  
Xin Wei Zhao
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Polarization Resistance ◽  
Electrochemical Impedance ◽  
Electrode Reaction ◽  
Reaction Process ◽  
Electrochemical Characteristics ◽  
Experimental Time ◽  
Corrosion Scale

The properties of corrosion scale on P110 carbon steel in the saltwater solution containing CO2 have been examined by electrochemical impedance spectroscope (EIS). The change of electrode reaction process on the corrosion scale has been discussed in the present work. It is found that the corrosion rate decreases with the increasing of the experimental time, and the reducing tendency of corrosion rate becomes low as the experimental time was 72 hours, EIS results indicate that the polarization resistance increases gradually and the electrode reaction is controlled by both diffusion and activation in comparison with activation only at the beginning.

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