Corrosion Characteristics of 16Mn and Q235B Steel in Natural Seawater

2012 ◽  
Vol 591-593 ◽  
pp. 1046-1049
Author(s):  
Yong Liu ◽  
Xing Hua Tong ◽  
Bao Guo Li ◽  
Yan Gang Wang ◽  
Lin Sen Zhu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Method ◽  
Electrochemical Impedance ◽  
Corrosion Process ◽  
Polarization Curves ◽  
Natural Seawater ◽  
Rust Layer ◽  
Tafel Polarization ◽  
Corrosion Electrochemical Behavior

In order to study the corrosion characteristics of 16Mn and Q235B steel in natural seawater, the indoor contrast corrosion experiments are carried out in seawater by electrochemical method. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) techniques are employed to investigate the corrosion electrochemical behavior of 16Mn and Q235B steel, which are acquired by electrochemical workstation. The results of polarization curves and EIS reveal the respective corrosion rules of 16Mn and Q235B steel in natural seawater. At last, the different influence of rust layer on the corrosion process of 16Mn and Q235B steel is analyzed contrastively.

Study on Corrosion Electrochemical Behavior of X42 and 16Mn Steel in Seawater

2013 ◽  
Vol 364 ◽  
pp. 599-602
Author(s):  
Bao Guo Li ◽  
Xing Hua Tong ◽  
Yong Liu ◽  
Yan Gang Wang ◽  
Lin Sen Zhu
Keyword(s):  
Electrochemical Behavior ◽  
Electrochemical Method ◽  
Electrochemical Impedance ◽  
Corrosion Process ◽  
Polarization Curves ◽  
Natural Seawater ◽  
Tafel Polarization ◽  
Corrosion Scale ◽  
16Mn Steel ◽  
Corrosion Electrochemical Behavior

In order to study the corrosion characteristics of 16Mn and X42 steel in natural seawater, the indoor contrast corrosion experiments are carried out in seawater by electrochemical method. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) techniques are employed to investigate the corrosion electrochemical behavior of 16Mn and X42 steel, which are acquired by electrochemical workstation. The results of polarization curves and EIS reveal the respective corrosion rules of 16Mn and X42 steel in natural seawater. At last, the different influence of corrosion scale on the corrosion process of 16Mn and X42 steel is analyzed contrastively.

Synthesis of poly(methylcarbazole) and its nanoclay and nanozinc composites and corrosion protection performances on stainless steel Type 304

2017 ◽  
Vol 24 (6) ◽  
pp. 825-832 ◽  
Author(s):  
Murat Ates
Keyword(s):  
Stainless Steel ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Equivalent Circuit Model ◽  
Optical Microscope ◽  
Polarization Curves ◽  
Protective Behavior ◽  
Zn Nanoparticles

AbstractMethylcarbazole (MCz) and its nanocomposites with Montmorillonite nanoclay and Zn nanoparticles were chemically synthesized on a stainless steel (SS304) electrode. The modified electrode was characterized by optical microscope, scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDX), Fourier-transform infrared spectroscopy-attenuated transmission reflectance (FTIR-ATR), four-point probe, and electrochemical impedance spectroscopy (EIS) analysis. The synthesized stainless steel/poly(methylcarbazole) (SS/P(MCz)), stainless steel/poly(methylcarbazole)/nanoclay (SS/P(MCz)/nanoclay), and stainless steel/poly(methylcarbazole)/nanoZn (SS/P(MCz)/nanoZn) were studied by potentiodynamic polarization curves. The protective behavior of these coatings in 3.5% NaCl as the corrosion medium was investigated using Tafel polarization curves, as well as electrochemical impedance spectroscopy. The corrosion protection parameters were also supported by EIS and an equivalent circuit model of Rs(Qc(Rc(QpRct))). The corrosion current of the SS/P(MCz)/nanoclay samples was found to be much lower (icorr=0.010 μA×cm-2) than that of SS/P(MCz)/nanoZn (icorr=0.031 μA×cm-2) and pure SS/P(MCz) samples. These results reveal that chemically synthesized SS/P(MCz), SS/P(MCz)/nanoclay, and SS/P(MCz)/nanoZn nanocomposite film coating have high corrosion protection efficiency (PE=99.56%, 99.89%, and 99.67%, respectively). Thus, based on the study findings, we posit that nanoclay and Zn nanoparticles possess favorable barrier properties, which can be employed in order to achieve improvements in chemical corrosion protection through P(MCz) coating.

Studies on Corrosion Behavior of S-165 and HP Supermartensitic Stainless Steels in Cl- Environment

2011 ◽  
Vol 695 ◽  
pp. 425-428
Author(s):  
Duo Wang ◽  
De Ning Zou ◽  
Chang Bin Tang ◽  
Kun Wu ◽  
Huan Liu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
Potentiodynamic Polarization ◽  
Electrochemical Impedance ◽  
Polarization Curves ◽  
Chemical Compositions ◽  
Pitting Potential ◽  
Potentiodynamic Polarization Curves

Supermartensitic stainless steel grades are widely used in oil and gas industries to substitute duplex and super duplex stainless steels these years. In this paper the corrosion behavior of supermartensitic stainless steels with different chemical compositions, S-165 and HP, was investigated in Cl-environment. All the samples were treated by quenching at 1000 °C followed by tempering at 630 °C for 2h. After heat treatment, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) were determined on both kinds of samples. Polarization curves shows that the metastable pitting nucleuses were formed in passive area and the Cr content is the most important factor leading to the differences of pitting potential. The potentiodynamic polarization curves were conducted at various NaCl contents (5000, 15000 and 35000 ppm) and emphasized the need to account for the Cl-sensitivity of samples under corrosion environment. The results show that, the pitting potential decrease with the increase of chloride contents. The behavior of passive film was analyzed by electrochemical impedance spectroscopy.

Study on Corrosion Process of Al-Mg Coatings Based on Electrochemical Impedance Spectroscopy

2017 ◽  
Vol 744 ◽  
pp. 380-384
Author(s):  
Hui Tong ◽  
Wen Li Han ◽  
Zhong Ping Xu ◽  
Yan Jun Zhang ◽  
Zhu Lin ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Corrosion Process ◽  
Corrosion Products ◽  
Passive Films ◽  
Nacl Solution ◽  
Electrochemical Testing ◽  
Immersion Corrosion

Electrochemical impedance spectroscopy (EIS) is a technology of nondestructive electrochemical testing. In this paper, EIS is applied to study the corrosion processes of Al-Mg coatings. In the initial 24 h of immersion in 3.5% NaCl solution, passive films of Al-Mg coatings dissolve quickly. As time passed, corrosion products increase on surface gradually, which can inhibit corrosion. After 480h of immersion, corrosion products fully cover on Al-Mg coatings’ surface. The EIS of different corrosion processes are fitted by three equivalent circuits corresponding to the three corrosion processes. In the test of open circuit potentials (OCP), OCP is instable in the initial 24 h of immersion. As immersion time goes by, OCP tends to stabilization at about -0.90 V. Measurements of scanning electron microscope (SEM) confirm the conclusions of electrochemical measurements.

Crevice Corrosion Behaviors of X52 Carbon Steel in Chloride Containing Solutions

2013 ◽  
Vol 652-654 ◽  
pp. 1432-1435
Author(s):  
Qian Hu ◽  
Jing Liu ◽  
Jie Zhang ◽  
Feng Huang ◽  
Xing Peng Guo
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Crevice Corrosion ◽  
Electrochemical Noise ◽  
Electrochemical Impedance ◽  
Corrosion Process ◽  
Nacl Solution ◽  
Concentration Difference ◽  
Corrosion Behaviors

The crevice corrosion behaviors of X52 carbon steel in two typical Cl--containing solutions were investigated by electrochemical noise and electrochemical impedance spectroscopy. Results show that oxygen concentration difference leads to the coupled current in NaCl + NaHCO3 solution while HAc concentration difference causes the coupled current in NaCl solution saturated with CO2 in the presence of HAc. There exists an apparent incubation stage during the crevice corrosion process of X52 carbon steel in the former. However, no obvious incubation period of crevice corrosion can be observed in the latter. Micrography shows that the crevice corrosion occurs indeed and the corrosion inside the crevice is not uniform.

Research on Corrosion Characteristics of Mild Steel in Sea Water at Weihai

2012 ◽  
Vol 229-231 ◽  
pp. 31-34
Author(s):  
Yan Gang Wang ◽  
Xing Hua Tong ◽  
Yong Jiang ◽  
Yong Liu ◽  
Lin Sen Zhu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Mild Steel ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Initial Period ◽  
Corrosion Layer ◽  
Corrosion Process ◽  
Polarization Curves ◽  
Technology Research ◽  
Electrochemical Test

The corrosion characteristics of mild steel in real sea water are investigated by electrochemical test in this paper. Polarization curves and electrochemical impedance spectroscopy (EIS) are got by electrochemical workstation. From polarization curves, it is found that the corrosion rate rises at the initial period, and it becomes the highest on the 3rd day, then drops, and it tends to be stable after about 15 days, which is confirmed by EIS. In addition, the experiments also show that the corrosion layer can suppress the corrosion process. The electrochemical corrosiveness of the mild steel is analyzed in this study, and it lays a foundation for anticorrosion technology research.

Inhibition effect of E and Z conformations of 2-pyridinealdazine on mild steel corrosion in phosphoric acid

2017 ◽  
Vol 64 (1) ◽  
pp. 23-35 ◽  
Author(s):  
Mohammed Elalaoui Belghiti ◽  
Ayssar Nahlé ◽  
Abdeslam Ansari ◽  
Yasser Karzazi ◽  
S. Tighadouini ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Content Type ◽  
Inhibition Effect ◽  
Tafel Polarization ◽  
Mild Steel Corrosion

Purpose This paper aims to study the inhibition effect of 2-pyridinealdazine on the corrosion of mild steel in an acidic medium. The inhibition effect was studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization measurements. Design/methodology/approach Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, X-ray diffraction and spectral and conformational isomers analysis of A (E-PAA) and B (Z-PAA) were performed were investigated. Findings 2-pyridinealdazine (PAA) acts as a good inhibitor for the corrosion of steel in 2.0 M H3PO4. The inhibition efficiency increases with an increase in inhibitor concentration but decreases with an increase in temperature. Originality/value This paper is intended to be added to the family of azines which are highly efficient inhibitors and can be used in the area of corrosion prevention and control.

Application of the voltammetry of microparticles for dating archaeological lead using polarization curves and electrochemical impedance spectroscopy

2012 ◽  
Vol 16 (7) ◽  
pp. 2349-2356 ◽  
Author(s):  
Antonio Doménech-Carbó ◽  
María Teresa Doménech-Carbó ◽  
María Amparo Peiró-Ronda ◽  
Isabel Martínez-Lázaro ◽  
Joaquín Barrio-Martín
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Polarization Curves ◽  
Voltammetry Of Microparticles

Study on Accelerated Corrosion Electrochemical Behavior of Q235B Steel in Sea Water

2012 ◽  
Vol 229-231 ◽  
pp. 40-43
Author(s):  
Yong Liu ◽  
Xing Hua Tong ◽  
Bao Guo Li ◽  
Yan Gang Wang ◽  
Lin Sen Zhu
Keyword(s):  
Corrosion Rate ◽  
Electrochemical Behavior ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Initial Period ◽  
Polarization Curves ◽  
Positive Role ◽  
Accelerated Corrosion ◽  
Tafel Polarization ◽  
Corrosion Electrochemical Behavior

In order to study the corrosion behavior of Q235B steel in seawater at Weihai, the indoor simulated and accelerated corrosion test is carried out by adding H2O2 in seawater. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) techniques are employed to investigate the corrosion electrochemical behavior of Q235B steel. Polarization curves and EIS are acquired by electrochemical workstation. From polarization curves, it is found that the corrosion rate rises rapidly during the initial period, and it becomes highest on the 3rd day, then drops, and tends to be stable after about 15 days. After that, the corrosion rate reduces slowly due to the covering effect of corrosion products, and then the conclusion is confirmed by EIS analysis. Analytical results indicate that the rust layer plays a positive role of hindering the corrosion process.

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