Inhibition of Steel Corrosion in Sulfuric Acid Solution by 1,10-Phenanthroline, para-Aminobenzoate and their Corresponding Manganese Complex

Abstract The ligands 1,10-phenanthroline, (P) and para-aminobenzoate, (B); as well as their corresponding MnPB complex [bis-(dimanganese di-μ-paraaminobenzoate dichloro diphenanthroline)] have been investigated as inhibitors of mild steel corrosion in H2SO4 (0.5 M) solutions via potentiodynamic and electrochemical impedance spectroscopy techniques. Stability of the prepared complex was examined by UV-visible spectroscopy. The corrosion inhibition, thermodynamics, and adsorptive properties obtained have shown that MnPB complex has remarkable effects in the acidic solutions. Theoretical fitting of different adsorption isotherms such as Langmuir, Flory–Huggins, and the kinetic-thermodynamic models were tested and the thermodynamic activation parameters were calculated. The data revealed that the corrosion inhibition mechanism of mild steel in acidic solutions by the MnPB complex goes via physicochemical adsorption.

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EFFECT OF ANION GROUPS ON CORROSION INHIBITION BEHAVIOURS OF VIETNAM ORANGE PEEL ESSENTIAL OIL FOR MILD STEEL IN THE ACIDIC MEDIA

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/55/5b/12215 ◽

2018 ◽

Vol 55 (5B) ◽

pp. 103

Author(s):

Bui Thi Thanh Huyen

Keyword(s):

Essential Oil ◽

Mild Steel ◽

Electrochemical Impedance ◽

Electrochemical Techniques ◽

Orange Peel ◽

Steel Corrosion ◽

Inhibition Mechanism ◽

Acidic Media ◽

Mild Steel Corrosion ◽

Potentiodynamic Electrochemical Impedance Spectroscopy

This paper deals with the effect of anion groups (SO42- and Cl-) on inhibition behaviours of Vietnam orange peel essential oil (OPE) for corrosion process of mild steel in acidic media. The electrochemical techniques (potentiodynamic, electrochemical impedance spectroscopy (EIS)), weight loss and scanning electron microscopy (SEM) analyses are used in this study. The results show that anion groups do not affect the inhibition mechanism of OPE. The OPE behaves as mixed inhibitor for mild steel corrosion in both 1N HCl and H2SO4 acid. The inhibition efficiency of OPE in 1N HCl is greater than that in 1N H2SO4 which implies that the adsorption of the inhibitor is influenced by the nature of anions in acidic solutions. Moreover, the OPE inhibits both general and pitting corrosion for mild steel in the acidic media.

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Assessment on the Effective Green-Based Nepal Origin Plants Extract as Corrosion Inhibitor for Mild Steel in Bioethanol and its Blend

European Journal of Advanced Chemistry Research ◽

10.24018/ejchem.2020.1.5.16 ◽

2020 ◽

Vol 1 (5) ◽

Author(s):

Prakash Katuwal ◽

Ramesh Regmi ◽

Susan Joshi ◽

Jagadeesh Bhattarai

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Adsorption Isotherms ◽

Inhibition Efficiency ◽

Steel Corrosion ◽

Inhibition Mechanism ◽

Mild Steel Corrosion ◽

Effective Inhibition ◽

Commercial Gasoline ◽

Polarization Studies

Effects of Nepal origin plant species of Vitex negundo, Catharanthus roseu, Aegle marmelos and Elaeocarpus ganitrus extracts on mild steel corrosion were explored in bioethanol (E100) and its blend (E15) in airtight condition at 25±2 °C using static immersion, inhibition efficiency and mechanism tests which were complemented with adsorption isotherms and potentiodynamic polarization studies. Corrosion resistance of the mild steel was increased with increasing 500-2000 ppm concentrations of each plant extract in E100 and E15 biofuels. Additions of V. negundo and C. roseus extract separately in both the biofuels seems to be more effective inhibition actions to prevent the mild steel corrosion than A. marmelos or E. ganitrus addition so as the corrosion rates of the mild steel in E100 and E15 are successfully lowered even than in commercial gasoline (E0). The results obtained from the corrosion rate revealed the order of the corrosion inhibition efficiency (IE) as V. negundo > C. roseus > A. marmelos > E. ganitrus. The maximum IE (IEmax) in V. negundo and C. roseus leaves was showed about 89-86% and 71-75%, respectively, at 2000 ppm concentration, in spite of the other two more plants leaf extract also used as the corrosion inhibitors for the mild steel in both E100 and E15 biofuels. The IE increased on increasing inhibitor concentration following the Langmuir and Temkin adsorption isotherms but decreased with immersion time which suggested that the corrosion inhibition mechanism is of physical type of adsorption of the leaves constituents on the mild steel surface. A. marmelos extract acted as an anodic type of inhibitor in E100 and E15, while E. ganitrus acted as mixed

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Experimental and theoretical approach to exploit the corrosion inhibition activity of 3-formyl chromone derivatives on mild steel in 1 m H2SO4

Corrosion Reviews ◽

10.1515/corrrev-2017-0029 ◽

2017 ◽

Vol 35 (2) ◽

pp. 95-110 ◽

Cited By ~ 13

Author(s):

Rajeev Kumar ◽

Savita Chahal ◽

Shefali Dahiya ◽

Naveen Dahiya ◽

Sumit Kumar ◽

...

Keyword(s):

Mild Steel ◽

Mass Loss ◽

Electrochemical Impedance ◽

Steel Corrosion ◽

Inhibition Mechanism ◽

Mild Steel Corrosion ◽

Polarization Study ◽

Polarization Technique ◽

Different Temperatures ◽

Loss Method

Abstract3-Formyl chromone (3FC) derivatives, viz. 5-methoxy-3FC (5-Me-3FC), 6-hydroxy-3FC (6-OH-3FC), and 7-hydroxy-3FC (7-OH-3FC), were studied for the inhibition of mild steel corrosion in 1 m H2SO4 at different temperatures and concentrations. The inhibition was studied using mass loss method, polarization technique, electrochemical impedance spectroscopy (EIS), scanning electron microscopy, and quantum chemical calculations. The results from mass loss, potentiodynamic polarization, and EIS showed that inhibition efficiency (IE) increased with gradual increments in concentration of 3FC derivatives. The polarization study revealed that these compounds act as mixed-type inhibitors and Langmuir adsorption isotherm is fitted well for adsorption behavior. The order of IE provided by all the three compounds is 7-OH-3FC≈6-OH-3FC>5-Me-3FC and lies in the range of 85%–95%. A proposed inhibition mechanism has been further described, including the support from all the experimental and theoretical techniques.

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ELECTROCHEMICAL BEHAVIOR OF MILD STEEL IN HCL 1M MEDIUM WITH THE PRESENCE OF ROSE MYRTLE LEAVES EXTRACTION

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/56/3b/12885 ◽

2018 ◽

Vol 56 (3B) ◽

pp. 63

Author(s):

Quan Vo An ◽

Tuan Anh Nguyen ◽

Ha Tran Thi ◽

Que Le Xuan

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Leaf Extract ◽

Electrochemical Impedance ◽

Steel Corrosion ◽

Corrosion Current ◽

Inhibition Mechanism ◽

Corrosion Behaviors ◽

Green Corrosion Inhibitors ◽

Rhodomyrtus Tomentosa

As the growing interest on green corrosion inhibitors, plant extracts have gradually showed the potential in replacing the traditional hazardous chemicals due to the eco-friendly and economy characteristics. Previous study reported that rose myrtle leaf-extract (Rhodomyrtus tomentosa, Myrtaceae) was as an efficient corrosion inhibitor for rust removal process of mild steel in H2SO4 acid medium. This study presents the corrosion inhibition assessments of rose myrtle leaf-extract on mild steel surface in HCl 1M solution. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods have been used to study the corrosion behaviors of mild steel. The corrosion rate, corrosion current and corrosion potential results indicate that only small amount of the leaf-extract (2% vol.) was required for high inhibition efficiency (Hin=83.9%). By affecting on both anodic and cathodic branches of the Tafel plot, the corrosion inhibition mechanism is proposed by an adsorption forming different barriers on the steel surface.Green inhibitor, Rhodomyrtus tomentosa, steel corrosion, EIS

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Corrosion Inhibition of Mild Steel by Benzotriazoliumionic Liquid in Hydrochloric Acid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.1409 ◽

2011 ◽

Vol 239-242 ◽

pp. 1409-1413

Author(s):

Hong Mei Wang ◽

Ke Long Huang ◽

Zhi Ping Zhu

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Potentiodynamic Polarization ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Steel Corrosion ◽

Polarization Data ◽

Impedance Measurements ◽

Mild Steel Corrosion ◽

Mixed Type Inhibitor

The inhibiting behavior of 1-ethyl-3-butylbenzotriazolium ionic liquids，[C2Bt][Br] ,on mild steel corrosion in 5 wt.% HCl as corroding solution was investigated using weight loss，potentiodynamic polarization and electrochemical impedance measurements. The obtained results indicated that [C2Bt][Br] is a good inhibitor for the mild steel in 5 wt.% HCl solution. The inhibition efficiency increased with an increase of inhibitive concentration. Potentiodynamic polarization data indicated that the [C2Bt][Br] acted essentially as a mixed-type inhibitor. The electrochemical impedance study showed that corrosion inhibition took place by adsorption.

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Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 Solution by Plant Extract of Annona squamosa

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23386 ◽

2021 ◽

Vol 33 (9) ◽

pp. 2219-2228

Author(s):

S. Karthikeyan ◽

S.S. Syed Abuthahir ◽

A. Samsath Begum ◽

K. Vijaya

Keyword(s):

Mild Steel ◽

Electrochemical Impedance ◽

Steel Corrosion ◽

Inhibitory Effect ◽

Inhibition Mechanism ◽

H2so4 Solution ◽

Annona Squamosa ◽

Mild Steel Corrosion ◽

Weight Loss Method ◽

Loss Method

In aqueous solution of 0.5M H2SO4, the Annona Squamosa extract was systematically analyzed to ensure its inhibition mechanism by using potentiodynamics polarization, the weight loss method, and electrochemical impedance spectroscopy (EIS) and its inhibitory effect on mild steel corrosion. For mild steel corrosion in 0.5 M H2SO4 solution, its inhibition efficiency increases and decreases with an increase in its concentration and temperature, respectively. Potentiodynamic polarization analyses revealed that the Annona Squamosa behaves as a cathodic inhibitor. In presence of Annona Squamosa extract in 0.5 M H2SO4 solution, an increase in the activation energy of corrosion leads to a decrease in the rate of mild steel corrosion. On mild steel surfaces, the adsorption behaviour of the extract conformed to the Temkin isotherm, Langmuir isotherm and Arrhenius equation. The EIS results were correlated with the polarization findings. According to atomic force microscopy (AFM) and scanning electron microscopy (SEM), the inhibition of mild steel corrosion proceeds through the adsorption of the extract on the mild steel surface.

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