Study of pitting corrosion on mild steel during wet–dry cycles by electrochemical noise analysis based on chaos theory

Chen, Anna; Cao, Fahe; Liao, Xiaoning; Liu, Wenjuan; Zheng, Lihua; Zhang, Jianqing; Cao, Chunan

doi:10.1016/j.corsci.2012.09.017

Cited by 47 publications

(24 citation statements)

References 61 publications

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“…The successful use of phytoconstituents as corrosion inhibitors in acidic media have been reported by some researchers (Olasehinde et al, 2013, Fouda et al, 2014, Devarayan et al, 2012, Abdulrahmanet al, 2011, Ten et al, 2012, Chen et al, 2013, Behpour and Mohammadi, 2012Negm et al, 2012). Efforts were made in this study to establish the inhibitory efficiency of F. asperifolia (Miq-Moraceace) stem bark extracts and the respective fractions; towards activity-directed purification of the plant extracts for better or improved inhibitory activities.…”

Section: Introductionmentioning

confidence: 99%

Assessment of anti-corrosion potentials of extract of Ficus asperifolia -Miq (Moraceae) on mild steel in acidic medium

Fadare¹,

Okoronkwo²,

Olasehinde³

2016

Afr. J. Pure Appl. Chem.

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The inhibitory potentials of ethanolic extracts and four fractions of the stem bark of Ficus asperifoliaMiq. for the corrosion of mild steel were assessed using weight loss method, Fourier atomic absorption spectroscopy, scanning electron microscopy (SEM). The effects of varying immersion period, concentration of the inhibitors and temperatures for mild steel corrosion in 5 M HCl acid solution were carried out. A detailed kinetic reaction, thermodynamic (Ea, ∆H, ∆S) and adsorption isotherm studies were obtained. The crude extract of F. asperifolia (EFA) has the highest inhibition efficiency of 55%. The inhibitory efficiency of the four fractions of F. asperifolia (EFA) compared with the crude extract was in the order ethyl acetate > n-hexane > butanol > EFA > Aqueous. The inhibition efficiency was found to increase with increase in the extracts concentration but decreased with temperature. Corrosion rate increases with time but decreases with extracts concentration. The kinetic studies of the data followed a first order reaction. Thermodynamic studies revealed that corrosion inhibition may be due to spontaneous mixed adsorption of the plant constituents on the metal surface. Experimental data were fitted to Langmuir, Freundlich and Temkin adsorption isotherms. The plant investigated showed a good potential for green corrosion inhibitors. Investigation of phytochemical constituents showed that the extracts contain alkaloids, flavonoids, saponins, tannins anthraquinones and reducing sugars.

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Section: Introductionmentioning

confidence: 99%

Assessment of anti-corrosion potentials of extract of Ficus asperifolia -Miq (Moraceae) on mild steel in acidic medium

Fadare¹,

Okoronkwo²,

Olasehinde³

2016

Afr. J. Pure Appl. Chem.

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“…The in situ electrochemical experimental set‐up, fabricated with high precision as reported in our previous work, is shown in Figure . It is composed of an electrochemical cell, an electrochemical workstation, and a water injection system.…”

Section: Methodsmentioning

confidence: 99%

“…The flow rate of the rain solution during the wet cycles was 40.0 ml min −1 . The initial thickness of the electrolyte layer after the rain was adjusted to 1100 ± 10 µm, determined by equipment consisting of an ohmmeter, a micrometer, and a sharp Pt needle, as detailed previously . In this equipment, the sharp Pt needle welded on the bottom of the ohmmeter served as a probe.…”

Section: Methodsmentioning

confidence: 99%

Effect of sulphate on the corrosion behavior of bronze under a chloride‐containing thin electrolyte layer

Liao

Cao

2018

Materials & Corrosion

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The effect of sulphate on the corrosion behavior of bronze under a chloridecontaining thin electrolyte layer (TEL) during wet-dry cycles has been studied by means of in situ electrochemical techniques and ex situ physical characterization. In the initial stage, corrosion rates of bronze under a chloride-containing TEL decrease in the presence of sulphate, due to the fact that pit corrosion is inhibited by the sulphate. After long-term exposure, however, corrosion rates are accelerated by sulphate addition, implying a synergistic effect between these components. This synergistic effect is ascribed to inhibition of the formation of protective Pb-containing products by sulphate. K E Y W O R D S atmospheric corrosion, bronze, EIS, synergistic effect 1412 |

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“…Based on the embedding theorems, a scalar time series x 1 , x 2 , . … ., x N , generated by a dynamic system is transformed into a vector matrix, V n , of time delays through the Equation (12) [54,55]. The phase space of the non-linear time series is then reconstructed by choosing an appropriate time delay (s) or an embedding dimension (m).…”

Section: Measurement Of Electrochemical Noise (En)mentioning

confidence: 99%

Electrochemical noise (EN) technique: review of recent practical applications to corrosion electrochemistry research

Obot

Onyeachu

Zeino

et al. 2019

Journal of Adhesion Science and Technology

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The ability to analyze different electrochemical corrosion phenomena, in-situ, without requiring any form of electrode perturbation has strongly attracted the attention of corrosion researchers towards the application of electrochemical noise (EN) analysis method. With the ability to analyze stochastic and chaotic electrode potential and current fluctuations at E OCP , the EN analysis method is capable of providing information about the kinetics and mechanism of metallic corrosion with accuracy that can match conventional electrochemical techniques. Herein, we review the recent applications of EN analysis method to electrochemical corrosion research. We discuss briefly the theory behind the measurement of EN, and then highlight some of its application in the evaluation of corrosion inhibitors, pitting corrosion, coatings on metals, microbiologically-induced corrosion, as well as CO 2-corrosion. The drawbacks of the EN analysis method have also been highlighted and future considerations on the use of this important electrochemical technique have also been proposed.

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Study of pitting corrosion on mild steel during wet–dry cycles by electrochemical noise analysis based on chaos theory

Cited by 47 publications

References 61 publications

Assessment of anti-corrosion potentials of extract of Ficus asperifolia -Miq (Moraceae) on mild steel in acidic medium

Assessment of anti-corrosion potentials of extract of Ficus asperifolia -Miq (Moraceae) on mild steel in acidic medium

Effect of sulphate on the corrosion behavior of bronze under a chloride‐containing thin electrolyte layer

Electrochemical noise (EN) technique: review of recent practical applications to corrosion electrochemistry research

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