A study on the mixed corrosion inhibitor with a dominant cathodic inhibitor for mild steel in aqueous chloride solution

Nam, Nguyễn Đăng; Hiến, Phạm Văn; Hoài, Nguyễn Thị; Thu, Vũ Thị Hạnh

doi:10.1016/j.jtice.2018.06.007

Cited by 79 publications

(31 citation statements)

References 35 publications

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“…This is related to a deposition process or a decrease in the local dielectric constant. 8,24,25 It is also consistent with the SEM images of the steel surface after inhibitor interaction that shows that the defective zone is filled with a porous oxide matrix (Figure 7c). The same film formation process causes an increase in the charge-transfer resistance, R CT , by two orders of magnitude of the steel sample immersed in the inhibitor solution.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Electrochemical and Surface Characterization Study on the Corrosion Inhibition of Mild Steel 1030 by the Cationic Surfactant Cetrimonium Trans-4-hydroxy-cinnamate

et al. 2021

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Effective corrosion inhibition of mild steel 1030 at 0.01 M NaCl concentration was achieved by the use of the nontoxic surfactant salt cetrimonium trans-4-hydroxy-cinnamate (CTA-4OHcinn). Polarization analysis on the steel samples immersed for 24 h in the control and CTA-4OHcinn-containing solutions shows the development of a passivation potential that is more obvious at higher inhibitor concentrations along with a maximum inhibition efficiency of 97.8%. Electrochemical impedance spectroscopy (EIS) pinpoints the effect of the inhibitor on the corroding regions of the metal surface, showing an increase in the local electric resistance and conversely a decrease in the local capacitance, which indicates that the charge transfer in the corroding regions is being hindered by a deposition process. This is consistent with scanning electron microscopy (SEM) images, showing the presence of a porous oxide matrix that fills localized corrosion sites on the metal surface after 24 h of immersion in a 0.01 M NaCl + 10 mM inhibitor solution. Additionally, SEM analysis also shows the formation of an organic film surrounding the defects that is able to shield chloride attack. As a result of diffusion of chloride from the defects below the protective film, filiform corrosion can be seen. Time-resolved impedance analysis over the first 120 min of immersion in the control and inhibitor solution shows that significant inhibitor protection does not take place immediately and there is a lag phase in the first 50 min of immersion, suggesting that early localized corrosion drives further adsorption of inhibitor micelles on the metal surface. This is in agreement with X-ray photoelectron spectroscopy (XPS) analysis, which indicates a complete surface coverage over the first 2 h of immersion in a concentrated inhibitor solution. XPS also shows the heterogeneity of the film, where some parts are poorly covered, revealing the underlying surface containing iron.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Electrochemical and Surface Characterization Study on the Corrosion Inhibition of Mild Steel 1030 by the Cationic Surfactant Cetrimonium Trans-4-hydroxy-cinnamate

et al. 2021

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“…However, the decrease in current density in the cathodic region is slightly more marked in solutions with inhibitors than in the blank solution and the anodic region. For this reason, P. porelloides extract acts as a cathodic controlled mixed-type inhibitor on the corrosion of mild in solution containing 1.0 M hydrochloric acid (Nam et al, 2018). While mixed-type inhibitors act on the metal surface, they play a role in both anodic and cathodic reactions.…”

Section: Potentiodynamic Polarization Measurement Resultsmentioning

confidence: 99%

Asidik Çözeltide Yumuşak Çelik için Çevresel Olarak Sürdürülebilir Yeni Bir Yeşil Korozyon İnhibitörü Olarak Plagiochila porelloides (Marchantiophyta)’e Genel Bir Bakış

Özkır

2021

Anatolian Bryology

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In this study, the corrosion inhibition effect of Plagiochila porelloides (Torr. ex Nees) Lindenb. extract, a Marchantiophyta species, on mild steel in hydrochloric acid solution at 298 K was investigated for the first time by applying electrochemical impedance spectroscopy (EIS), linear polarization (LPR) and potentiodynamic polarization techniques. Experiments were performed by immersing mild steel electrodes in acidic solutions containing different concentrations of Plagiochila porelloides extract for 1 hour before each electrochemical measurement to equilibrate with the aggressive solution. Liverwort extract showed a strong inhibitory effect as a result of 1 hour electrochemical experiments, and as the extract concentration increased, the protective effect of mild steel in acidic solutions raised. In addition, the surface images of the electrodes in 1.0 M HCl solutions with and without liverwort extract after 1-hour exposure were examined by an optical microscope and it was shown that the metal surface in the inhibited extract solution had a smoother appearance compared to the uninhibited metal surface. Electrochemical findings and surface images support each other.

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“…Comparing the fitting results of different equivalent circuits in published papers (Królikowski et al 2011;Ma et al 2015;Nam et al 2018), an equivalent circuit with the smallest error and closest to the actual system has been established, as shown in Fig. 4.…”

Section: Effect Of Inhibitor Concentration On Inhibitionmentioning

confidence: 96%

Effectiveness Protection Performance of an Internal Blending Organic Corrosion Inhibitor for Carbon Steel in Chloride Contaminated Simulated Concrete Pore Solution

Wang

Zhao

et al. 2020

ACT

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Application of corrosion inhibitors is considered as one of the most economical and effective solutions for the protection of reinforced concrete structures under severe environment. The aim of this paper is to investigate the protection performance and mechanism of an internal blending organic inhibitor for carbon steel in chloride contaminated simulated concrete pore solution. The influences of concentration of inhibitor, chloride content and pH value of the solutions on the protection efficiency were investigated. Both weight loss and electrochemical were used to evaluate the protection efficiency of the inhibitor. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) analyses were performed to reveal the mechanism of corrosion resistance of the inhibitor. Results indicated that the corrosion of carbon steel in chloride contaminated simulated concrete pore solution was highly resisted in presence of inhibitor, the inhibition efficiency of 3.5% NaCl saturated Ca(OH) 2 solution with 4% inhibitor reached 89%. With lower pH value, corrosion of steel will happen easier even with addition of inhibitor. However, inhibitor will still have effective even to protect carbon steel in fully carbonated concrete. The organic film with characteristics of aromatic groups can be detected on the carbon steel surface in presence of inhibitor, confirming the protection effects for steel.

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A study on the mixed corrosion inhibitor with a dominant cathodic inhibitor for mild steel in aqueous chloride solution

Cited by 79 publications

References 35 publications

Electrochemical and Surface Characterization Study on the Corrosion Inhibition of Mild Steel 1030 by the Cationic Surfactant Cetrimonium Trans-4-hydroxy-cinnamate

Electrochemical and Surface Characterization Study on the Corrosion Inhibition of Mild Steel 1030 by the Cationic Surfactant Cetrimonium Trans-4-hydroxy-cinnamate

Asidik Çözeltide Yumuşak Çelik için Çevresel Olarak Sürdürülebilir Yeni Bir Yeşil Korozyon İnhibitörü Olarak Plagiochila porelloides (Marchantiophyta)’e Genel Bir Bakış

Effectiveness Protection Performance of an Internal Blending Organic Corrosion Inhibitor for Carbon Steel in Chloride Contaminated Simulated Concrete Pore Solution

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