Study Of Corrosion Inhibition Research Articles

Synthesis, Characterisation and Corrosion Inhibition of Mild Steel by Butyltin(IV) 2-Acetylpyridine 4-Methyl-3-Thiosemicarbazone in HCl

Schiff base ligand, 2-acetylpyridine 4-methyl-3-thiosemicarbazone (Me-LH), and its organotin complex (BuSn(Me-LH)Cl2) were synthesized, characterized, and subjected to corrosion inhibition study. The spectra and crystal structure obtained revealed that the ligand is coordinated by pyridyl nitrogen, azomethine nitrogen, and thiolate sulfur to organotin (IV) ion. Corrosion inhibition of the synthesized compounds on mild steels in 1 M HCl solution at different concentrations were tested using weight loss, Electrochemical Impedance Spectroscopy (EIS), potentiodynamic polarization, Scanning Electron Microscopy (SEM) and adsorption analyses. Corrosion inhibition results showed that the complex had a strong corrosion inhibitory effect in comparison to the ligand. The inhibition efficiency of all the techniques improved with an increase in the concentration of corrosion inhibitor. Polarization analysis results showed that the compounds can be categorized as mixed-type inhibitors. Meanwhile, the EIS study indicates that with an increase in the concentration of corrosion inhibitor, the resistance to charge transfer increased. This resulted in the adsorption of inhibitors and the development of a protective layer on the mild steel surface which was further confirmed by SEM analysis. The adsorption isotherm of compounds on a mild steel surface followed the Langmuir isotherm model.
 HIGHLIGHTS
 
 The efficient method to inhibit the corrosion rate of mild steel in an acidic medium is a corrosion inhibitor
 The electrochemical and weight loss analysis proved that the corrosion inhibition efficiency increases when the concentration of inhibitor is increased
 The study proved that the thiosemicarbazone complex showed the potential as corrosion inhibitors at low concentrations
 
 GRAPHICAL ABSTRACT

Corrosion inhibition and adsorption mechanism of Morus nigra on mild steel in acidic medium: A sustainable and green approach

AbstractMorus nigra (Mulberry leaves) was tested as a green inhibitor for mild steel (MS) in 0.5 M HCl by theoretical, surface study, and experimental techniques. The impedance, polarization, microscopy, Langmuir, and DFT (computational) techniques were used for the adsorption and corrosion inhibition study. The experimental and theoretical study supports each other results. Adsorption parameters were observed by Langmuir, Gaussian09W (DFT), and BIOVIA Materials Studio softwares. The surface study was carried out by metallurgical microscopy technique. The theoretical study includes chemical potential, electron‐donating power, chemical hardness, HOMO, LUMO, metal inhibitor interaction energy, adsorption energy, etc. UV‐visible, NMR, and FTIR studies show that aspartic acid is the major constituent present in the mulberry leaves extract. A 91.62% corrosion protection was provided by the Morus nigra at 1000 ppm. Polarization study proved mixed inhibition. The green inhibitor follows both physical and chemical modes of adsorption. The biochemical and chemical oxygen demand of unused acid left after the gravimetric study was found in an acceptable range.

Electrochemical and Theoretical Study of Corrosion Inhibition on X60 Steel in H2SO4 Solution by Omeprazole

Electrochemical and Theoretical Study of Corrosion Inhibition on X60 Steel in H2SO4 Solution by Omeprazole

Novel M2+ Complexes of 2-(thiazol-2-ylamino)-2, 3-dihydronaphthalene-1,4-dione Schiff base: Design, Preparation, Characterizations and Corrosion Inhibition Studies

Novel M2+ Complexes of 2-(thiazol-2-ylamino)-2, 3-dihydronaphthalene-1,4-dione Schiff base: Design, Preparation, Characterizations and Corrosion Inhibition Studies

Synthesis, Corrosion inhibition study and DFT calculation of two New Azo Compounds

Synthesis, Corrosion inhibition study and DFT calculation of two New Azo Compounds

Synthesis, Characterization, Antimicrobial and Corrosion Inhibition Studies of Fused Oxadiazolo‐quinolines

AbstractA novel series of 2‐(4‐substituted phenyl)‐6/8‐substituted‐ [1,3,4] oxadiazolo[2′,3′:2,3][1,3]thiazino[6,5‐b]quinolin‐11(3aH)‐ones were synthesized. Their structures have been characterized using standard spectroscopic techniques such as Infrared, Nuclear Magnetic Resonance, and Mass Spectroscopy. All the newly synthesized compounds were screened for their antibacterial and antifungal activities by the cup plate diffusion method. Antimicrobial studies revealed that compounds showed good to significant activity against tested strains. One of the compounds was evaluated for corrosion inhibition studies by potentiodynamic polarization and electrochemical impedance method in 0.1 M hydrochloric acid solution for mild steel. The tested compound had exhibited a good inhibitory action against corrosion of mild steel in the medium investigated.

Novel synthesis of 3-(Phenyl) (ethylamino) methyl)-4-hydroxy-2H-chromen-2-one derivatives using biogenic ZnO nanoparticles and their applications

The present work describes the novel synthesis of 3, 3'-((phenyl) (ethylamino) methyl)-4-hydroxy-2H-chromen-2-one derivatives catalyzed by biogenic ZnO nanoparticles. The synthesized heterocyclic compounds were characterized by fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) andmass spectrometric techniques. Absorption, distribution, metabolism and excretion properties and various toxicities (ADMET) studies and in silico molecular docking studies were carried out for the synthesized compounds. The synthesized compounds were screened for their efficacy towards the antioxidant activity and were subjected to corrosion inhibition study towards the mild steel in acidic medium by weight loss method. Additionally, the recyclability of the employed catalyst was studied.

2,4-Dichlorophenylacrylate Copolymers as Corrosion Inhibitor for Mild Steel in 0.5M H2SO4 solution

Herein we report, the poly (NTA-2,4-Dichlorophenylacrylate) copolymers were synthesized using N-tert-amylacrylamide and 2,4-Dichlorophenyl acrylate monomers by Free-radical polymerization at 60°C. The synthesized copolymers were subjected to corrosion inhibition studies on Mild steel using 0.5M H2SO4 solution. These copolymers are showed the corrosion inhibition efficiency of 86.0%

A combined experimental and theoretical study of green corrosion inhibition of bronze B66 in 3% NaCl solution by Aloe saponaria (syn. Aloe maculata) tannin extract

Since antiquity, bronzes have been one of the main cultural heritage metallic artifacts. Currently, they continue to have many applications in various industrial fields. Nevertheless, bronzes are subject to the corrosion process in aggressive environments containing chlorides. To overcome this destructive phenomenon, various conventional protection inhibitors have been developed. Unfortunately, these prevention inhibitors have serious drawbacks are expensive and harmful to human health and the environment. Plant extracts are one of the alternatives that can be used as an ecological, cost-effective and efficient alternative. In this context, Aloe saponaria tannin (AST) extract has been tested as green corrosion inhibitor for bronze B66 in 3% NaCl. The experimental study was conducted by gravimetric and electrochemical measurements, supplemented by surface analysis scanning electron microscopy (SEM) coupled to energy dispersive X-ray spectroscopy (EDX). Which allowed us to highlight the protective effect of our inhibitor. In addition, to investigate the adsorption action of AST compounds over the bronze surface, the theoretical simulations based on the MD (molecular dynamics) and DFT (density functional theory) were done. The electrochemical measurements confirmed the results obtained from the gravimetric measurements and noted that the effect of our inhibitors alters the mechanism of the electrochemical process at the metal/solution interface. The experimental results obtained allowed to note that the AST compounds act as a cathodic type inhibitor. Then, the maximal inhibition efficiency reaches 90% at 150 ​ppm of AST extract. Moreover, the results of theoretical modeling studies supported the adsorption of AST molecules on the target metal substrate.

Corrosion inhibition, adsorption behaviour, and thermodynamic studies of red dragon fruit (Selenicereus costaricensis) waste peel extracts on mild steel in acidic environment

Metal corrosion is brought about by the oxidation of atoms on the surface resulting in irreversible damage to structures at staggering costs. Hence, the search for efficient and cost-effective corrosion inhibitors is relevant. In this study, the ethanolic extract of Red Dragon Fruit (Selenicereus costaricensis) waste peels (RDF) has been tested for its anti-corrosion property using the weight loss method at different temperatures (303-343 K). The calculated inhibition efficiency of 2% RDF is 97%. Thermodynamic studies reveal that increasing inhibitor concentration raises the activation parameters of mild steel in acidic media such as activation energy (Ea) and changes in enthalpy (Ho) and entropy (So). Moreover, increased immersion time, inhibitor concentration, and temperature led to increased inhibition efficiency. The spontaneous process (Go ads = -23.47 kJ/mol) of adsorption of RDF on mild steel surfaces obeys the Langmuir isotherm model. Lastly, optical microscopy of the inhibited and uninhibited systems confirms the potential of the RDF against pitting corrosion.

Thermodynamic study of corrosion inhibition of Dioctylsulfosuccinate Sodium Salt as corrosion inhibitor against mild steel in 1 M HCl

Scanning electron microscopy (SEM) and weight loss studies were performed to determine the corrosion inhibition effectiveness of Dioctylsulfosuccinate Sodium Salt in 1 M HCl against mild steel. The inhibitory effectiveness of Dioctylsulfosuccinate Sodium Salt improves with increasing doses but declines with temperature, reaching 93.32 % at 298 K at 0.67 mM, according to the findings. Langmuir adsorption isotherm was followed by the adsorption mechanism. The thermodynamic parameters such as Kads and ΔG°ads are determined and explained. Scanning electron microscopy (SEM) verified the development of an inhibitor-adsorbed layer on the mild steel (MS) surface. The findings demonstrated that the investigated inhibitor significantly decreased mild steel corrosion in acid environments.

Corrosion Inhibition Studies of 8-Hydroxyquinoline Derivatives for N80 Steel in 1.0 M Hcl Solution: Experimental, Computational Chemistry, and Qsar Studies

Corrosion Inhibition Studies of 8-Hydroxyquinoline Derivatives for N80 Steel in 1.0 M Hcl Solution: Experimental, Computational Chemistry, and Qsar Studies

Corrosion inhibition studies of ferrocenyl Schiff bases in a mild acidic medium through experimental methods and DFT calculations

The organometallic ferrocenyl Schiff bases were synthesized and tested as anticorrosive material on AA2219-T6 in acidic medium using Tafel polarization, EIS, weight loss analysis, FT-IR spectroscopy and theoretically proved by DFT.

Comparative Modeling, Optimization and Optimal Corrosion Inhibition Studies of Aspilia-Africana Leaf Extract on Mild Steel and Aluminum Metal in Acid Medium

Comparative Modeling, Optimization and Optimal Corrosion Inhibition Studies of Aspilia-Africana Leaf Extract on Mild Steel and Aluminum Metal in Acid Medium

Adsorption, Electrochemical Behavior, and Theoretical Studies for Copper Corrosion Inhibition in 1 M Nitric acid Medium using Triazine Derivatives

This study evaluated, the corrosion inhibition behavior of some triazine derivatives, including 2,4-diphenyl-6-((1E)-1-(4-phenyl-2-(phenyldiazenyl)tetraaz-3-en-1-ylidene)ethyl)-2,3,4,5-tetrahydro-1,2,4-triazine (TA-1) and 2,4-diphenyl-6-((E)-1-((E)-4-phenyltetraaz-2-en-1-ylidene) ethyl)-2,3,4,5-tetrahydro-1,2,4-triazine (TA-2) were surveyed for copper corrosion in 1 M HNO3 solutions by using electrochemical methods, such as potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS). PP plots showed that the examined (TA-1) and (TA-2) are virtuous compounds for the copper corrosion inhibition in 1 M HNO3 solutions, and they assume the role of mixed-type inhibitors. Double layer capacitances reduce referring to blank solution once the examined inhibitors were added. The inhibition efficiency reached maximum values of TA-1 and TA-2 are 91.4%, 88.9 at 10-4M, respectively. The copper surface processed with the examined components was anatomized by X-ray photoelectron spectroscopy to verify the formation of adsorbed protective barrier. The examined components followed Langmuir adsorption isotherm; they were adsorbed on copper through chemisorption adsorption. Density functional theory (DFT) calculations and MC simulations were performed to assist the adsorption characteristics and the mechanism of corrosion inhibition using the examined inhibitors. Moreover, the examined inhibitors were used as adsorbate on the Cu (111) surface and, the adsorption energy was detected on copper exterior.

Inhibition effects of ionic and non-ionic derivatives of imidazole compounds on hydrogen permeation during carbon steel pickling

Hydrogen embrittlement can occur when atomic hydrogen is absorbed by steel during the acid cleaning process. In the literature, studies of corrosion inhibition by organic compounds in acid solutions have not given attention to the inhibition of hydrogen permeation in the steel. In this work, we show that the best corrosion inhibition does not always indicate the best hydrogen permeation inhibition. For the first time, imidazole-based compounds were studied as hydrogen permeation inhibitors during carbon steel pickling in hydrochloric acid at high concentration (5.4 mol L−1). The immersion of steel in solutions containing 250 mg L−1 of the inhibitors 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) resulted in low corrosion inhibition efficiency of approximately 18% in both cases. On the other hand, the hydrogen permeation inhibition efficiency was 59%. The addition of 2-(nitromethylene) imidazolidine (IMD) and 2-(nitromethylene) oxazolidine (OXA) to HCl solutions provided corrosion inhibition efficiencies of 46.7% and 24.4%, respectively. However, these compounds did not present hydrogen permeation inhibition effects.

Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

AbstractCorrosion in carbon steel units of chemical, petrochemical and oil and gas plants poses safety and economic concerns. The goal of our study is to investigate the corrosion inhibition effectiveness of an environmentally benign surfactant, namely sodium lauroyl lactylate (SLL), in comparison to sodium cocoyl glutamate (SCG) and sodium dodecyl sulfate (SDS). The corrosion of carbon steel in 1 M HCl was markedly inhibited by 0.05 and 0.1 M of the anionic surfactant SLL, as determined from weight loss over 96 h, at ambient conditions. X‐ray photoelectron spectroscopy (XPS) showed that SLL adsorbed at the carbon steel surface, forming a protective film that decreased corrosion. Scanning electron microscopy (SEM) showed that carbon steel surfaces immersed in 1 M HCl for 96 h had an etched appearance without SLL, whereas they retained their smoothness with 0.1 M SLL. Electrochemical impedance spectroscopy (EIS) measurements confirmed that SLL passivated carbon steel surfaces, markedly increasing the polarization resistance Rp from ≈95 to ≈20,694 Ω cm2 over a 12 h period. In contrast, without SLL, Rp decreased from ≈92 to ≈12 Ω cm2. These results demonstrate for the first time that the environmentally friendly surfactant SLL is an efficient corrosion inhibitor in extreme environments such as 1 M HCl solutions. Dissimilar to SLL, SCG and SDS were not effective in inhibiting corrosion.

Corrosion inhibition and adsorption studies of Ammonium oxalate for mild steel by computational and experimental techniques: A sustainable approach

• AO was tested as corrosion inhibitor for mild steel in 0.5 M HCl. • Gravimetric, polarization, impedance, metallurgical, DFT, LAI methods were used. • AO was proved to be very good anti-cracking and anti-pitting agent. • AO shows 94.94% corrosion inhibition efficiency for mild steel. • BOD and COD of wastewater was found to be within the permissible limits. The exact mechanism of inhibition and adsorption is very essential for designing acid corrosion inhibitors. So far sincere efforts are lacking in explaining the exact mechanism of adsorption and corrosion inhibition for acid corrosion inhibitors. Ammonium oxalate (AO) was investigated as a highly efficient corrosion inhibitor for mild steel in 0.5 M HCl by different theoretical and experimental methods. Experimental methods like gravimetric, impedance, polarization, and metallurgical microscopy were supported by theoretical techniques like DFT, MD simulation, Frontier molecular orbital, and adsorption isotherm studies. Surface studies like the morphology of corroded specimens, nature, and type of corrosion were carried out by metallurgical microscopy technique. Different chemical interaction parameters (global reactivity parameters) between the inhibitor and mild steel provide sufficient information about the adsorption and inhibition mechanism shown by AO for mild steel. A linear correlation regression coefficient was observed between AO concentration and inhibition efficiency. A maximum of 94.94% inhibition efficiency was observed at a 1000 ppm concentration of AO. The polarization study shows that AO act as a mixed inhibitor. Impedance study proves that an increase in AO concentration leads to an increase in charge transfer resistance and hence barrier film thickness. The length of pores, percentage porosity, and intensity of cracks decreases appreciably after the addition of 100 ppm of AO. The biochemical assay of waste acid after gravimetric experiments was observed to be within permissible limits. Ammonium oxalate (AO) was investigated as a highly efficient corrosion inhibitor for mild steel in 0.5 M HCl by different theoretical and experimental methods. Experimental methods like gravimetric, impedance, polarization, and metallurgical microscopy were supported by theoretical techniques like DFT, MD simulation, Frontier molecular orbital, and adsorption isotherm studies. Surface studies like the morphology of corroded specimens, nature, and type of corrosion were carried out by metallurgical microscopy technique. Different chemical interaction parameters (global reactivity parameters) between the inhibitor and mild steel provide sufficient information about the adsorption and inhibition mechanism shown by AO for mild steel. A linear correlation regression coefficient was observed between AO concentration and inhibition efficiency. A maximum of 94.94% inhibition efficiency was observed at a 1000 ppm concentration of AO. The polarization study shows that AO act as a mixed inhibitor. Impedance study proves that an increase in AO concentration leads to an increase in charge transfer resistance and hence barrier film thickness. The length of pores, percentage porosity, and intensity of cracks decreases appreciably after the addition of 100 ppm of AO. The biochemical assay of waste acid after gravimetric experiments was observed to be within permissible limits.

Dispersive interactions in the adsorption and corrosion inhibition effects of Alstonia boonei on mild steel in acidic environments

PurposeThe purpose of this paper is to study the adsorption properties of a proven traditional medicine of West Africa origin, Alstonia boonei with an attempt to evaluate its application in the corrosion protection of mild steel in 5 M H2SO4 and 5 M HCl.Design/methodology/approachPhytochemical screening and Fourier transform infrared spectroscopy analysis were used to characterize the methanolic extract of the plant. Gravimetry, gasometry and electrochemical techniques were used in the corrosion inhibition studies of the extract and computational studies were used to describe the electronic and adsorption properties of eugenol, the most abundant phytochemical in Alstonia boonei.FindingsThe extract acted as a mixed-type inhibitor in both acidic solutions, with improved inhibition efficiency achieved with increasing concentration. While the efficiency increased with temperature for the HCl system, it decreased for the H2SO4 system. The mechanism of adsorption proposed for Alstonia boonei was chemisorption in the HCl system and physisorption in the H2SO4 system, and the adsorptions obeyed Langmuir isotherm at low temperatures. Computational parameters showed that eugenol, being a representative of Alstonia boonei, possesses excellent adsorption properties and has the potential to compete with other established plant-based corrosion inhibitors.Research limitations/implicationsAs opposed to pure compounds with distinctive corrosion effects, plant extracts are generally composed of a myriad of phytoconstituents that competitively promote or inhibit the corrosion process and their net effect is evident as inhibition efficiencies. This is, therefore, the main research limitation associated with the corrosion inhibition study of Alstonia boonei.Originality/valueBeing very rich in antioxidant properties by its proven curative and preventive effects for diseases, the interest was stimulated towards the attractive results that abound from its corrosion protection of metals via its anti-oxidation route.

Corrosion inhibition studies on mild steel in HCl by a newly synthesized benzil monohydrazone based Schiff base

The corrosion inhibition effect of newly formulated Schiff base 2-((E)-((E)-2-hydrazone-1, 2-diphenylethylidene) amino phenol) (HDAP) ligand L derived from Benzil monohydrazone and 2-Aminophenol on mild steel in 1 ​M HCl was examined. Electrochemical (Tafel and EIS) and mass loss techniques were employed to evaluate its corrosion protection efficiency. The inhibition efficiency (η %) was elevated with raise in concentration of compound L.Maximum inhibition efficiency of 94.18% was obtained at 0.01 ​M concentration of HDAP from Tafel polarisation curve. From electrochemical impedance (EIS) studies, it was confirmed that increase in concentration of HDAP led to enhancement of the charge transfer resistance. Both physical and chemical types of adsorptions were observed for the Schiff base via π-bonding electrons which obey Langmuir adsorption isotherm. The SEM picture revealed development of a thin layer on metallic surface. Quantum chemical evaluations were conducted to find out the mechanism of corrosion retardation power of HDAP.