Carbon Steel In Acidic Media Research Articles

Electrochemical evaluation and DFT calculations of aromatic sulfonohydrazides as corrosion inhibitors for XC38 carbon steel in acidic media

Two newly synthesized sulfonohydrazide derivatives, namely N '- {(E) - [4- (dimethylamino) phenyl] methylidene}benzenesulfonohydrazide (MBSH), and N '- {(E) - [4- (dimethylamino) phenyl] methylidene} -4- methylbenzenesulfonohydrazide (MpTSH) have been investigated as corrosion inhibitors for XC38 carbon steel in 1 M HCl using electrochemical measurements (potentiodynamic polarization, linear polarization resistance, electrochemical impedance spectroscopy) and theoretical calculations.Results obtained show that these derivatives are good corrosion inhibitors for carbon steel in molar HCl. Their inhibition efficiency increases with their concentration, but decreases with increasing temperature. Substituting a methyl group in MpTSH for a hydrogen atom in MBSH slightly improves its effectiveness. Both inhibitors display a mixed-type. Their adsorption on the steel surface proceeds essentially via physisorption mode and obeys the Langmuir adsorption isotherm. Good correlations were obtained between the anti-corrosion performance of these donor-acceptor compounds and their molecular properties.

Development of twelve parameter prediction model for examining the under-pipe corrosion deposit condition of localized carbon steel in acidic media

This paper presents an under deposit condition of localized carbon steel in acidic gas solutions by developing and using a twelve parameters condition prediction model. The proposed analytical model was tested against De Waard models, neural network model and experimental result and found to have an accuracy of 82.4% against 23%, 53.3%, 95.6% of De Waard Lotz and Milliams models and NN mode and was found to give reasonably accurate results. It had root mean square error (RMSE) of 0.024, mean absolute error (MAE) 0.019, scattered index (SI) 0.371 and with coefficient of determination (R2) of 82.4% in the validation series. The method is useful for introducing nonlinear conditions prediction in undergraduate/postgraduate engineering with manual computation coupled with lesser error and very simple method in application for better corrosion management than the existing manual traditional models.Keywords: Model, under-deposit, Carbon steel, Corrosion management

Detailed characterization of Phellodendron chinense Schneid and its application in the corrosion inhibition of carbon steel in acidic media

We present a combined experimental and theoretical study of the effective corrosion protection of carbon steel in 1 M HCl solution by Phellodendron chinense Schneid (PCS) bark extract. Fourier-transform infrared spectroscopy (FTIR) and liquid chromatography tandem multi-stage mass spectrometry (LC-MSn) were employed for the extract characterization. The properties of PCS as a corrosion inhibitor were evaluated by electrochemical and gravimetric experiments. Quantum chemical calculation was used to describe the electronic and adsorption properties of the identified and characterized compounds found in the extract while molecular dynamics simulation was employed to predict the equilibrium configurations and binding energies of the compounds on the steel surface. The electrochemical results revealed that PCS acted as a mixed-type corrosion inhibitor whose efficiency increased with the extract concentration but slightly decreased with increasing temperature. Quantum chemical parameters, such as the energy difference (ΔE) and the number of transferred electrons (ΔN), were used to predict the contribution of each characterized compound to the inhibition process while molecular dynamics simulation predicted parallel orientations for the configuration of the compounds and high binding energies on the metal substrate.

New MOF-Based Corrosion Inhibitor for Carbon Steel in Acidic Media

In this research, we present a novel class of metal–organic framework-based corrosion inhibitor materials named as zeolitic imidazolate framework-8@{Mo132} (ZIF-8@{Mo132}) nano-structure as an efficient and green inhibitor in HCl solution. To this purpose, ZIF-8@{Mo132} nano-structure is prepared via a convenient and excellent interaction of {Mo132} and ZIF-8 surface using a versatile recipe. Afterward, the application of the mentioned organometallic nano-structure as a corrosion inhibitor for carbon steel in HCl solution was evaluated and was compared with pristine ZIF-8 performance. In this sense, surface observation, electrochemical impedance spectroscopy and polarization resistance were applied to study inhibitory action of both ZIF-8 and ZIF-8@{Mo132}. Full factorial design of the experiments was also implemented to investigate the real operating variables including inhibitor concentration, immersion time and temperature affecting the inhibition efficiency (%IE). The obtained ANOVA analyses indicated that temperature is not very significant and effective parameter on inhibition efficiency for both inhibitors. On the other hand, the thermodynamic study revealed that chemisorption occurs during ZIF-8@{Mo132} adsorption on the metal surface due to the high tendency of anionic ZIF-8@{Mo132} inhibitor to absorb over steel surface. This observation was also confirmed by AFM and SEM images taken from the steel surface. It is also found that ZIF-8@{Mo132} nano-structure demonstrated high activity as an effective corrosion inhibitor in HCl solution.

Experimental, theoretical and mathematical studies of Echium italicum L. extract as a corrosion inhibitor for carbon steel in acidic medium

Butanolic extract of Echium italicum L. (BEEI) was investigated as eco-friendly corrosion inhibitor for carbon steel (API 5L-X60) in 1 M hydrochloric acid solution using electrochemical, gravimetric and scanning electron microscopy methods. The effect of rising temperature was inspected and the apparent energies of the dissolution process were discussed. The BEEI behaved as mixed type inhibitor with the highest inhibition at 500 ppm. The adsorption of the inhibitor on the steel surface, follow Freundlich isotherm and its mod was found to be physisorption. The corrosion rate decreased with increase in the inhibitor concentration and rose with temperature. Additionally, quantum chemical parameters such as energy gap, EHOMO and ELUMO were calculated and used to predict the relationship for the adsorption mechanism. The obtained experimental data were in good agreement with those predicated by mathematical regression.

Gravimetric, electrochemical and surface study on the good’s buffer ionic liquid as corrosion inhibitor for carbon steel in acidic medium

This corrosion study assessed the inhibition performance of carbon steel in 1 M of hydrochloric acid (HCl) using Good’s buffer ionic liquids (GBIL) namely 1-Butyl-3-methylimidazolium 2-(N-Morpholino) propane, [BMIM][MOPS] using electrochemical impedance, potentiodynamic polarization, and weight loss (gravimetric) measurements. GBIL are synthesized by the combination of Good's buffer as anion and various organic bases as the cation. The gravimetric measurements exhibit higher reduction in weight for carbon steel exposed to the acidic environment in the absence of corrosion inhibitor (CI) as compared to carbon steel immersed in the presence of inhibitor molecule. Potentiodynamic polarization study indicates that the synthesized inhibitor acted as a mixed type inhibitor. The inhibition efficiency increases with increase in the concentration of [BMIM][MOPS]. Corrosion protection efficiency ranging from 88% to 90% was featured at 800 ppm of CI in the HCl medium. The adsorption of [BMIM][MOPS] on the carbon steel surface was described by the Langmuir's adsorption isotherm. The scanning electron micrographs inspected the morphology of the carbon steel surface exposed to the solution without and with the presence of inhibitor. The result showed that compound effectively suppressed corrosion by the appearance of an improved surface structure of carbon steel with increasing concentration of [BMIM][MOPS].

Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution

Corrosive processes in acidic medium reduce the performance and durability of metallic materials, causing problems to several industries. Corrosion inhibitors are commonly used to decrease these effects. As these inhibitors must be ecologically friendly currently, this work evaluated the anticorrosive effect of natural extracts of coffee husks (Coffea arabica L.) in the protection of carbon steel in 1 mol L-1 HCl solution. Extractions were performed using water as the extraction solvent. The polyphenols content increased with the extraction temperature, and the extracts were produced using 100 oC. Extract concentrations of 10, 20 and 30 % v/v were analyzed as inhibitors for carbon steel in acid medium, using weight loss and electrochemical tests, as well as scanning electron microscopy. There was an increase in the inhibition efficiency as the extract concentration increased, reaching values around 97 % using 30 %v/v of extract for the weight loss tests.

Study of corrosion inhibition property of metal oxides for carbon steel in acidic medium by gravimetric analysis

Study of corrosion inhibition property of metal oxides for carbon steel in acidic medium by gravimetric analysis

A study on anticorrosion property of Drypetes sepiaria on carbon steel in acidic medium

A study on anticorrosion property of Drypetes sepiaria on carbon steel in acidic medium

Synthesis and Characterization of New Triazole Derivatives as Corrosion Inhibitors of Carbon Steel in Acidic Medium

Six novel triazole derivatives were synthesized from some substituted benzoic acid with thiocarbohydrazide by grinding method. The synthesized compounds were characterized by infra-red, 1H, and 13C-NMR spectra investigations. Synthesized triazole derivatives were tested and evaluated as corrosion inhibitors for low-carbon steel in 0.5 M HCl using weight loss technique. It was found that these compounds had a promising inhibitory action against corrosion of mild steel in acidic solution. Inhibitor with highest performance was evaluated at different temperature and inhibitor concentrations. The inhibition efficiency exceeded 96%. The excellent inhibitor performance was attributed to the formation of inhibitor adsorption films on the steel surface. The adsorption of inhibitor on steel surface followed the Langmuir adsorption isotherm. The experimental results were confirmed via theoretical quantum chemical calculations.

Electrochemical Studies on New Pyridazinium Derivatives as Corrosion Inhibitors of Carbon Steel in Acidic Medium

Two pyridazine derivatives “1-decylpyridazin-1-ium iodide” (DPI) and “1-tetradecylpyridazin-1-ium iodide” (TPI) were synthesized and investigated as corrosion inhibitors for carbon steel in HCl (1 M) solution. In order to evaluate the anticorrosion activity of these compounds, the electrochemical impedance spectroscopy was performed at different concentrations and at various temperatures (303–333 K). The collected results showed that DPI and TPI reached a value of 86.7% and 88.6% at 10−3 M, respectively (303 K). The decrease of the double-layer capacitance for TPI became more remarkable with increase in temperature. The adsorption of both inhibitors on mild steel surface obeyed the Langmuir adsorption isotherm. An inhibition efficiency of 97.6% was obtained at the optimum concentration (10−3 M) following an immersion period of 12 h. The quantum chemical calculations based on DFT method supported the experimentally obtained results.

Quantum chemical studies on inhibition activities of 2,3-dihydroxypropyl-sulfanyl derivative on carbon steel in acidic media

Quantum chemical studies on inhibition activities of 2,3-dihydroxypropyl-sulfanyl derivative on carbon steel in acidic media

Inhibitor effect of new azomethine derivative containing an 8-hydroxyquinoline moiety on corrosion behavior of mild carbon steel in acidic media

Inhibitor effect of new azomethine derivative containing an 8-hydroxyquinoline moiety on corrosion behavior of mild carbon steel in acidic media

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.

Electrochemical Corrosion Behaviour of Carbon Steel in Acidic Media in Presence of Mn2O3 Nanoparticles Synthesized at Different pH

Electrochemical Corrosion Behaviour of Carbon Steel in Acidic Media in Presence of Mn2O3 Nanoparticles Synthesized at Different pH

Corrosion inhibition studies of cashew nut (Anacardium occidentale) on carbon steel in 1.0 M hydrochloric acid environment

The corrosion inhibitive characteristics of the cashew nut (Anacardium occidentale) were studied as an eco-friendly green corrosion inhibitor at ambient temperature of 25 °C using weight loss analysis and adsorption isotherms. The effect of inhibitor concentration (4–12 g/l) at immersion time of 3–12 days was evaluated. The inhibitive ability of cashew nut shows a significant inhibition efficiency of 86% at 12 g/l concentration for 3-days and 72.9% at 12-days, which are undoubtedly as a result of the absorption of the inhibitor molecules on the metal surface which serve as a barrier against corrosion of carbon steel in acidic medium. The adsorption mechanism was found to fit Tempkin isotherms. The average optimum free energy of absorption was calculated to be −17.374 kJ mol–1 indicating that the process was exothermic and physisorption.

Düşük Karbon Çeliğinin Asidik Ortamdaki Korozyonuna Karşı İnhibitör Özelliği Gösteren 4-Okso-Kinazolin Türevi Katyonik Yüzey Aktif Maddelerin Sentezi

Birçok ülkede olduğu gibi bizim ülkemizde de metal korozyonunu önlemeye yönelik kullanılan yöntemlerden biri uygun inhibitör kullanımıdır. Bu amaç doğrultusunda bu çalışmada, 4-okso-kinazolin türevi olan uzun karbon zinciri içeren 3 adet katyonik piridinyum yüzey aktif madde sentezlenmiş ve 1.0 M HCl asit çözeltisi ortamında metal korozyonuna karşı inhibisyon etkinlikleri incelenmiştir. Sentezlenen bileşiklerin yapıları spektroskopik yöntemlerle aydınlatıldıktan sonra yapılan asidik ortamdaki korozyon testleri, oda sıcaklığında 24 saat süreyle ve metal kuponlarındaki kütle kaybına dayalı gravimetrik metotla gerçekleştirilmiştir. Düşük karbon çeliği kullanılarak yapılan korozyon testleri sonucunda, inhibitörlerin değişik konsantrasyonlarında oldukça iyi inhibisyon etkinlikleri (%87.90 - %97.37) elde edilmiştir. İnhibisyon etkinliklerinin dışında yine kütle kaybı değerlerinden yararlanarak inhibitörsüz ve inhibitörlü ortamlardaki korozyon hızları hesaplanmıştır. Son olarak, kütle kaybı yöntemiyle deneysel olarak elde edilen inhibisyon etkinliklerini desteklemek amacıyla taramalı elektron mikroskobu ile metal yüzeylerinin görüntüleri çekilmiştir.

Electrochemical Study of Candesartan Drug as Corrosion Inhibitor for Carbon Steel in Acid Medium

Candesartan drug was utilized as an inhibitor for carbon steel (CS) corrosion in 1 M HCl by utilizing many techniques: weight loss (WL), electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) techniques. WL is investigated at various temperatures between (25 – 45 °C) but all electrochemical studies at room temperature. The inhibition efficiency (% IE) increment with expanding doses of the Candesartan drug. The activation and the adsorption parameters were investigated and calculated by the effect of temperature on the inhibition of corrosion. The adsorption of the Candesartanon CS surface was found to obey with Langmuir adsorption model. The morphology of inhibited CS was analyzed by the energy dispersive X-ray spectroscope (EDX), atomic force microscopy (AFM) and scanning electron microscope (SEM). All techniques were utilized to examine the corrosion inhibition of the drug and confirm the formation thin film adsorbed on the metal surface and prevent the corrosion process. Polarization data revealed that this drug affect both anodic and cathodic reactions.

Erratum: Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

Erratum: Evaluation of Castor Bark Powder as a Corrosion Inhibitor for Carbon Steel in Acidic Media

β-Enaminoesters as Novel Corrosion Inhibitors for Carbon Steel in Acidic Medium

In this work, two β-enaminoesters, EN1 and EN2, were synthesized, characterized and their anticorrosion effects on American Iron and Steel Institute (AISI) 1020 carbon steel in 0.5 mol L-1 HCl were investigated using gravimetric and electrochemical methods. The results revealed that both compounds inhibit corrosion. Good correlations were observed between results obtained for gravimetric and electrochemical methods. EN1 exhibited highest efficiency of 98% after 24 h of immersion in HCl solution. The adsorption of compounds on steel surface followed the modified Langmuir adsorption isotherm. Surface morphology of carbon steel was examined using scanning electron microscopy showing that the metal surface was protected by EN1 as inhibitor of corrosion.