Carbon Steel In Acid Solution Research Articles

Evaluation of the anticorrosion performance of malt bagasse as corrosion inhibitor for AISI 1020 carbon steel in acidic solution

The malt bagasse is a solid residue, highly produced in the brewing industry. The presence of high levels of antioxidants in its composition makes this residue an attractive possibility as a corrosion inhibitor, besides being a sustainable and low cost alternative to the inorganic procedures currently used to prevent corrosion. In this sense, this work evaluated the efficiency of the malt bagasse powder as a corrosion inhibitor on the surface of AISI 1020 carbon steel, in different concentrations, in acidic medium 0.5 mol.L-1 HCl. The resistance to corrosion was tested by electrochemical techniques, such as electrochemical impedance spectroscopy (EIS) and anodic and cathodic polarization curves. The efficiency of the corrosion inhibitor was evaluated by weight loss tests. Fourier transform infrared spectroscopy (FTIR) and optical microscope surface image analysis were respectively used as chemical and morphological characterization techniques, respectively. From the EIS results, it can be said that the powder has its efficiency increased once the concentration is higher. On the other hand, the polarization curves shows the malt bagasse powder as an inhibitor presents both anodic and cathodic behavior. The weight loss results confirmed the electrochemical results, showing 92.5% efficiency for the 1.77 g.L-1 concentration. The adsorption isotherm on the steel surface follows Languimir’s Isotherm. The FTIR analysis indicates the presence of heteroatoms such as C, N, O, incorporated in functional groups that could be responsible for the inhibitory properties found in the powder. The images obtained from the optical microscope, showed that the corrosion process, in the presence of the inhibitor in the electrolyte, is retarded. Therefore, the results indicate that the malt bagasse powder has the potential to be a corrosion inhibitor for steel in acidic medium, adding value in the beer production chain.

Inhibition behavior of nitrogen-doped carbon dots on X80 carbon steel in acidic solution

In order to restrain the corrosion issue in the picking process of metal materials, nitrogen-doped carbon dots (NCDs) with a size of 2 ~ 4 nm have been fabricated via hydrothermal synthesis with citric acid and thiourea as precursors. The corrosion inhibition behavior of NCDs on X80 carbon steel were investigated in 0.1 M HCl solutions with electrochemical experiments, the weight loss method, and surface morphology analysis. The Tafel curves showed that the inhibition efficiency reached as high as 92.98% at the NCDs concentration of 10 mg·L−1, indicating that NCDs had significant anti–corrosion capacity for X80 carbon steel. Impedance spectroscopy data revealed that the diameter of the capacitive reactance increased with increasing the NCDs concentration. More corrosion inhibitor molecules can be adsorbed on the metal surface instead of water molecules, which enhanced corrosion resistance of carbon steel. Weight loss experiment and surface morphology analysis strongly supported the results of electrochemical experiments. In addition, the NCDs adsorption at X80 surface followed the Langmuir adsorption isotherm, which was mainly dominated by physical adsorption.

Experimental and Theoretical Studies of Taxus Baccata Alkaloid Extract as Eco-Friendly Anticorrosion for Carbon Steel in Acidic Solution

The effect of the alkaloid extract of Taxus baccata (AETB) as a green inhibitor of carbon steel in 1M HCl solution, were assessed. It was found that the inhibition efficiency increased with the extract concentration and decreased with rising of temperature. The polarization curves revealed that the (AETB) acted as mixed type inhibitor. The extract was physisorbed on steel surface and obeys Langmuir’s model. Quantum chemical calculations and molecular dynamics simulation of the majority’s components existing in (AETB) were performed in order to correlate the electronic properties with their adsorption and inhibition behavior.

Advanced self-healing coatings based on ZnO, TiO2, and ZnO-TiO2/polyvinyl chloride nanocomposite systems for corrosion protection of carbon steel in acidic solutions containing chloride

Anti-corrosion protective self-healing coating systems for carbon steel that utilizes ZnO, TiO2, and ZnO-TiO2 nanocomposites and polyvinyl chloride (PVC) as an organic healing agent was introduced. These nanocomposites systems were fabricated by a facile preparation method by the coating of ZnO, TiO2, and ZnO-TiO2 with PVC. These synthesized systems are well characterized by the investigation techniques of Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), and Transmission electron microscopy (TEM). The good crystallinity of the zincite and anatase phases was confirmed by XRD studies along with a nano grain size of 46.5 nm for ZnO and 13.5 nm for TiO2. ZnO, TiO2, and/or ZnO-TiO2/polyvinyl chloride composites films were applied as an anti-corrosive coating deposited on carbon steel by dip-coating processes. The anticorrosion performance of uncoated and coated carbon steel was inspected in 0.5 M HCl+3.5% NaCl by performing immersion test, Eocp vs. time, impedance spectroscopy (EIS), and potentio-dynamic polarization (PDP) methods. The ZnO, TiO2, and/or ZnO-TiO2/PVC composite coating exhibited premium protection against corrosion of C-steel with protection capacity of 96.2–97.1% after 10 days of exposure. The capacity of the fabricated films increased in the order of ZnO-TiO2/PVC > TiO2 /PVC > ZnO /PVC. The surface topology of the coated specimen before and after 240 hrs dipping in the aggressive medium was assessed using FE-SEM. The current study contributes to the preparation of novel protective systems with self-healing capability for steel corrosion in acidic medium containing chloride.

Corrosion inhibition of carbon steel by three kinds of expired cephalosporins in 0.1 M H2SO4

It is difficult to avoid corrosion to carbon steel in acidic solutions, thus, in order to inhibit the corrosion of carbon steel during the acid pickling process, inhibitors must be added to the acid pickling solutions. In this work, the corrosion inhibition of carbon steel by three kinds of expired cephalosporins in 0.1 M H2SO4 was investigated by electrochemical, weight loss and scanning electron microscopy (SEM) methods. For the carbon steel electrode, the electrochemical results revealed that the current density was decreased, while, the charge-transfer resistance was increased in the presence of cephalosporins in 0.1 M H2SO4 corrosive solution. The weight loss results confirmed that the addition of cephalosporins decreased the corrosion rate of carbon steel. Further, the inhibition efficiency was increased with the increase in the concentration of cephalosporins. The SEM analysis of carbon steel surface was performed to confirm the effect of cephalosporins on the corrosion inhibition. The presented research demonstrated the efficient use of expired drugs for effective corrosion inhibition which could be applied to the industries at the large scale.

Corrosion Inhibition Study on (Z)-N’-(1-phenylethylidene) benzohydrazide Derivatives on Carbon Steel in Acidic Solutions.

Decomposition of carbon steel via corrosion process has caused a serious damage to several organisations worldwide. Despite efforts put in place to curb this menace by scientists, havoc caused by corrosion of metal still remain. Therefore, in a way to find effective corrosion inhibitor, (Z)-N'-(1-phenylethylidene) benzohydrazide derivatives was optimised using density functional theory and the obtained molecular descriptors correlated well with the experimental percentage inhibition efficiency. Also, the developed quantitative structure-activity relationship study (QSAR) model revealed that dipole moment impeccably define anti-corrosion properties of (Z)-N'-(1-phenylethylidene) benzohydrazide Derivatives.

Experimental complemented with microscopic (electronic/atomic)-level modeling explorations of Laurus nobilis extract as green inhibitor for carbon steel in acidic solution

In the present study, comprehensive research efforts were made to experimentally/theoretically examine the corrosion protection capability of Laurus nobilis leaves extract for carbon steel in an acidic medium composed of 1 M HCl. The experimental EIS results evidenced that upon steel exposure to a corrosive electrolyte containing 400ppm L. nobilis leaves extract the maximum protection performance of 92% was obtained after 2.5h. The experiments of potentiodynamic polarization proposed a mixed-type anodic/cathodic anti-corrosion action along with small cathodic prevalence. The electronic features established by the DFT approach highlighted that the surface adsorption mechanism could be described by donor-acceptor interactions.

Inhibition Effect of Benzylpenicillin Drug Towards Corrosion of Carbon Steel in Acidic Solutions

Inhibition Effect of Benzylpenicillin Drug Towards Corrosion of Carbon Steel in Acidic Solutions

Epoxy prepolymer as a novel anti-corrosive material for carbon steel in acidic solution: Electrochemical, surface and computational studies

Atetra-functional aromatic epoxy prepolymer namely, 4, 4′-(ethane-1, 2-diyl) bis (N, N-bis (oxiran-2-ylmethyl) aniline) (AA1) was synthesized as evaluated corrosion inhibitor for carbon steel. TheAA1 was characterized using 1H NMR and FT-IR methods. The anti-corrosive property of AA1 for carbon steel corrosion in 1 M HCl solution was evaluated using several experimental and computational techniques. The AA1 showed highest efficiency of 96.5 % at 10−3M concentration. PDP study suggested that AA1 behaves slight anodic predominance and its adsorption of the AA1 obeyed the Langmuir adsorption isotherm model. DFT study conducted in neutral as well as protonated forms suggested that AA1 acts as efficient anti-corrosive material under both the conditions and its adsorption mainly takes place through polar heteroatoms (N and O) and two aromatic rings as HOMO and LUMO are mainly localized over the center part of the AA1 molecule. MDS suggested that AA1 adsorbs using its flat orientation and its adsorption decreases with rise in temperature. Adsorption energies were in negative indicating that AA1 adsorption occurs spontaneously as all studied temperatures.

An Exemplar Imidazoline Surfactant for Corrosion Inhibitor Studies: Synthesis, Characterization, and Physicochemical Properties

AbstractAn optimized one‐pot recipe has been developed to synthesize a surfactant molecule, referred to as OMID, consisting of an imidazoline head group and aliphatic tail, which is an exemplar corrosion inhibitor for carbon steel in acidic solutions. As evidenced by gas chromatography, 1H and 13C nuclear magnetic resonance, and Fourier‐transform infrared data, a high‐purity product was achieved without the use of either a solvent or catalyst. Critical micelle concentration values and corrosion inhibition efficiencies ( η%) were determined in aqueous solutions of hydrochloric acid and sulfuric acid using surface tensiometry and linear polarization resistance measurements, respectively. Hydrolysis of the imidazoline head group as a function of pH (0–11) was explored with ultraviolet–visible absorption spectroscopy. In addition, N 1s and C 1s X‐ray photoelectron spectroscopy data were acquired from both surface‐adsorbed OMID and a multilayer of the imidazoline head group of OMID. These latter data are highly relevant to those attempting to understand OMID inhibition chemistry.

Experimental and computational simulations for the effect of new Arylfuranylnicotinamidine derivatives against degradation of carbon steel in acid solutions

PurposeThe purpose of this paper is to investigate three Arylfuranylnicotinamidine derivatives against corrosion of carbon steel (C-steel) in 1.0 M HCl by chemical and electrochemical means. The inhibition efficiency (%IE) increases with increasing the dose of inhibitors. The tested compounds exhibited improved performance at elevated temperature, with %IEreaching 93 percent at 21 µM. Tafel polarization method revealed that the tested compounds act as mixed-type inhibitors. The inhibition action was rationalized due to chemical adsorption of inhibition molecules on C-steel surface following Temkin’s isotherm. Surface examination was carried out by AFM and FTIR techniques. Further, theoretical chemical approaches were used to corroborate the experimental findings.Design/methodology/approachExperimental and computational methods were applied to investigate the efficiency of these new compounds. These studies are complemented with spectral studies and surface morphological scan by AFM. The theoretical results indicate good correlation with experimental findings.FindingsThe tested derivatives are promising corrosion inhibitors for C-steel in the acid environment. The molecular scaffold of this class of compounds can be used to design new highly efficient inhibitors by screening its activity by modeling studies.Originality/valueThe studied compounds are safe inhibitors and greatly adsorbed on Fe surface. The action of compounds is enhanced with temperature, which means these compounds can be used in higher temperature systems. The new compounds are effective at very low concentration.

Investigation of effect of an amine inhibitor on corrosion of carbon steel by using thin layer activation technique

In the present investigation, thin layer activation technique has been employed to study the effectiveness of an amine derivative compound, namely hexamethylene tetramine (HMTA) for corrosion inhibition of carbon steel in acid solution. The corrosion studies have been performed in 1 mol dm−3 HCl containing different concentrations of inhibitors. Inhibition efficiency of HMTA at different experimental conditions has been estimated. It was observed that at ambient condition, 500 ppm HMTA effectively inhibits acid corrosion of carbon steel with an inhibition efficiency of 89.8%. The inhibition efficiency was found to be altered by increase in the temperature of corrosive solution.

Investigation of 6-[5-(4-Methoxyphenyl) furan-2-yl] Nicotinonitrile as a New Corrosion Inhibitor for Carbon Steel in Acidic Solution: Chemical, Electrochemical and Quantum Chemical Studies

Theeffect of 6-[5-(4-methoxyphenyl) furan-2-yl] nicotinonitrile (MA-1160) as a new corrosion inhibitor for carbon steel (CS) in hydrochloric acid (HCl) solution was investigated using weight loss (WL), atomic absorption spectroscopy (AAS) and electrochemical measurements. The surface morphology of CS was tested using: scanning electron microscopy, atomic force microscope, attenuated total reflection–Fourier transform infra-red and ultraviolet–visible spectroscopy methods. The adsorption of MA-1160 on CS surface obeyed the model of Langmuir isotherm. Polarization data revealed that this inhibitor behave as mixed-type inhibitor. The spectroscopic measurements revealed the formation of a protective adsorbed layer on CS surface. Quantum chemical calculations were calculated and discussed using density functional theory method. The inhibition efficiency (% €) was 84% in WL, 86.4% in AAS, 86.0% in potentiodynamic polarization and 84.8% in EIS 86% at 21 µM. Thus, all the test methods gave good agreement with each other in % €.

Expired Domestic Drug - Paracetamol - as Corrosion Inhibitor for Carbon Steel in Acid Media

In this paper, the possibility to use expired drug paracetamol as corrosion inhibitor for carbon steel in acid solutions has been investigated. 0.5 mol L−1 sulfuric acid and 1 mol L−1 hydrochloric acid have been used as corrosive media in the experimental studies. Electrochemical behaviour of paracetamol and its stability in test solutions have been examined by cyclic voltammetry. Further, the inhibitory effect has been studied by several methods: linear polarization, electrochemical impedance spectroscopy and chronoamperometry. As well, Tafel plots method was used in order to determine kinetic parameters of the corrosion process.

Two Novel Benzodiazepines as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid: Experimental and Computational Studies

Two new benzodiazepine derivatives namely, 1-ethyl-4-(2-oxopropylidene)-1,2,4,5-tetrahydro-2H-1,5-benzodiazepine-2-one (BZD-1) and 1-octyl-4-(2-oxopropylidene)-1,2,4,5-tetrahydro-2H-1,5-benzodiazepine-2-one (BZD-2) have been synthesized and used as corrosion inhibitors for carbon steel in acidic solution (1 M HCl). Corrosion inhibition evaluation was performed using weight loss, electrochemical techniques [potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)], quantum chemical calculations, and molecular dynamic (MD) simulations. The results showed that both compounds are good corrosion inhibitors for carbon steel in 1 M HCl medium; their inhibition efficiency increased with inhibitor concentration. In addition, the results obtained from above methods reveal that BDZ-2 is an excellent inhibitor. It gives a maximum inhibition efficiency of 96.63% at 10−3 M and inhibits corrosion by adsorbing at the carbon steel surface. EIS measurements showed that the charge transfer resistance increases, whereas the double-layer capacitance decreases with the inhibitor concentration. Polarization studies showed that BDZ-1 and BDZ-2 are mixed type. The tested inhibitors have been adsorbed on the carbon steel surface according to Langmuir isotherm adsorption model. The experimental results are in reasonably close agreement with quantum chemical parameters calculated at DFT/B3LYB/3-21G and the molecular dynamic simulations results.

Biomass of Microalgae Spirulina Maxima as a Corrosion Inhibitor for 1020 Carbon Steel in Acidic Solution.

Biomass of Microalgae Spirulina Maxima as a Corrosion Inhibitor for 1020 Carbon Steel in Acidic Solution.

Theoretical Study of the Mechanism of Corrosion Inhibition of Carbon Steel in Acidic Solution by 2-aminobenzothaizole and 2-Mercatobenzothiazole

Theoretical Study of the Mechanism of Corrosion Inhibition of Carbon Steel in Acidic Solution by 2-aminobenzothaizole and 2-Mercatobenzothiazole

Study of Synthesis and Corrosion Inhibition of Novel Mannich and Schiff Bases on Carbon Steel in Acid Solution

In this paper, a Schiff base (SB-1) and derivatives (SB-2 and SB-3) was synthesized and characterized by IR and 1H NMR methods, the corrosion efficiency and mechanism of carbon steel in 1: 1 hydrochloric acid was obtained by weight loss measurements, atomic absorption spectrophotometry, electrochemical measurements, atomic force microscopy studies and quantum chemical calculations. The results indicated that the inhibition efficiency was SB-3 > SB-2 > SB-1 at low concentration of inhibitors. Under high concentration, they have same efficiency. The electrochemical measurements showed that the synthesized compounds is an efficient mix-type inhibitors and its efficiency increased with the increase in inhibitor concentrations. The quantum chemical parameters were calculated using the density functional theory (DFT), and results showed that the inhibitor and the metal surface interacted with the donor-acceptor to achieve the effect of corrosion inhibition.

Keto-enol heterocycles as new compounds of corrosion inhibitors for carbon steel in 1 M HCl: Weight loss, electrochemical and quantum chemical investigation

In this paper, the effect of Keto-enol derivatives namely (Z)-3-hydroxy-1-(pyridin-2-yl)but-2-en-1-one (KE-1) and (Z)-1-(1,5-dimethyl-1H-pyrazol-3-yl)-3-hydroxy-3-(pyridin-2-yl)prop-2-en-1-one (KE-2) on the inhibition of carbon steel (CS) corrosion in 1M HCl has been studied using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and quantum chemical study. Weight loss measurements indicate that these compounds reduce the corrosion rate of carbon steel in acidic solution and the inhibition effect increases with the inhibitors concentration but decreases with temperature. The electrochemical polarization study revealed that the tested Keto-enol derivatives are mixed type. EIS show that the KE-1 and KE-2 form an adsorptive layer on the metallic surface. The adsorption of the KEs on the carbon steel surface obeys the Langmuir adsorption isotherm. The results of quantum chemical calculations and Monte Carlo simulation studies are in good agreement with experimental results.

Rollinia occidentalis extract as green corrosion inhibitor for carbon steel in HCl solution

An extract of Rollinia occidentalis as well as pure solutions of two acetogenins isolated from this extract, namely Rolliniastatin-1 and Motrilin, were tested as corrosion inhibitors for carbon steel in acidic solutions. Weight loss measurements were performed in the 298–328K temperature range and the obtained data were used to calculate corrosion rate and inhibition efficiency. It was found that the extract and the acetogenins solutions act as good corrosion inhibitors for the tested C-steel in 1M HCl media. Moreover, results from potentiodynamic polarization measurements indicate that R. occidentalis and the two tested acetogenins act as mixed-type inhibitors. Data collected from EIS studies were modeled with an equivalent circuit containing a single time constant what can be understood in terms of a corrosion inhibition process resulting from the geometric blocking effect of the carbon steel surface by an adsorbed inhibitor species. Inhibitor adsorption follows a Langmuir adsorption isotherm. The inhibition efficiency decreases with increasing temperature and extract concentration. Spectroscopic analysis points to the formation of a complex between metal cations and compounds present in the R. occidentalis extract. This additional aspect is considered in the proposed inhibition mechanism of C-steel.