Steel In Hydrochloric Acid Solution Research Articles

Inhibitive properties, adsorption and theoretical study of 3,7-dimethyl-1-(prop-2-yn-1-yl)quinoxalin-2(1H)-one as efficient corrosion inhibitor for carbon steel in hydrochloric acid solution

The corrosion inhibition efficiency of 3,7-dimethyl-1-(prop-2-yn-1-yl)quinoxalin-2(1H)-one (DPQO) on carbon steel in 1.0M HCl solution has been investigated using, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), weight loss, and scanning electron microscopy (SEM) methods. The results showed that the inhibition efficiency of DPQO increased with the inhibitor concentration but decreased with temperature. Polarization studies revealed that DPQO acts as a mixed-type inhibitor at 308K. The inhibitor adsorption on the steel surface obeyed the Langmiur isotherm and the thermodynamic parameters (Kads, ΔGadsο) were calculated and discussed. The corrosion process in 1.0M HCl in the absence and presence of DPQO followed first-order kinetics. Activation parameters of the corrosion process (Ea, ΔHa and ΔSa) were also calculated from the corrosion rates. SEM results supported the adsorption conclusions. Quantum chemical calculations have been performed using DFT and several quantum chemical indices of DPQO were calculated and correlated with its inhibitive effect.

Influence of cerium(III) ions on corrosion of TRIP 800 steel in hydrochloric acid solution

Ce(III) was studied for its corrosion inhibition property on the corrosion of TRIP 800 C‐Mn‐Si steel in 0.5 M hydrochloric acid at 25 °C by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. SEM was used to examine the specimen surface exposed to 0.5 M HCl containing the optimal threshold Ce(III) concentration (2.5 mM). A model for the corrosion process mechanism and inhibition by Ce(III) salt for TRIP 800 steel in the tested medium is proposed.

Inhibition Behaviour of 2-[(2-Methylquinolin-8-yl) Oxy] Acetohydrazide on the Corrosion of Mild Steel in Hydrochloric Acid Solution

A hydrazide derivative containing quinoline moiety namely 2-[(2-methylquinolin-8-yl)oxy]acetohydrazide (MQH) has been synthesized and its corrosion inhibition performance and adsorption behaviour on mild steel in 0.5 and 1 M HCl solution have been tested by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The inhibition efficiency of MQH increases with increase in its concentration and decreases with increase in HCl concentration. Further the, inhibition efficiency of MQH increases in 0.5 M HCl and decreases in 1 M HCl with increase in temperature. Polarisation curves indicate that MQH is a mixed inhibitor, affecting both cathodic and anodic corrosion currents. The adsorption of MQH at the mild steel/HCl solution interface obeys Langmuir adsorption isotherm model and inhibition process follows mixed adsorption with predominantly chemisorption in 0.5 M and physisorption in 1 M HCl. The activation and thermodynamic parameters for the corrosion inhibition process have been calculated to explore the mechanism of corrosion inhibition.

Corrosion Inhibition of Equisetum Ramosissimum Extractive for Carbon Steel in Hydrochloric Acid Solution

The inhibition effect of Equisetum ramosissimum extractive (ERE), extracted by hot wa- ter extraction method, on the corrosion of Q235 steel in 1 mol·L -1 HCl solution was investigated by means of polarization curves and electrochemical impedance spectroscopy (EIS). The results showed that ERE could effectively inhibited the steel corrosion, and acted as a mixed-type inhibitor with predominant control of the cathodic reaction. The inhibition efficiency increased with increas- ing dose of the extractive and was stable within the range of experimental temperature (20~50 ℃). By fitting the EIS data, it was found that the adsorption of ERE molecules on the steel surface obeyed both the Langmuir and the Dhar-Flory-Huggins adsorption isotherms. Spectroscopic analy- sis and scanning electron microscope observation confirmed existence of a adsorbed film of ERE on the steel surface.

Evaluation of an Expired Nontoxic Amlodipine Besylate Drug as a Corrosion Inhibitor for Low-Carbon Steel in Hydrochloric Acid Solutions

The corrosion inhibition of Amlodipine Besylate drug as a corrosion control of low-carbon steel in 1 M HCl solution was investigated by electrochemical and chemical techniques. The inhibition efficiency (%IE) was found to increase with an increase in drug concentrations but deceases with increasing the temperature. Results showed that this drug acts as a mixed-type inhibitor. It was found that this drug acts via adsorption on the low-carbon steel surface and the adsorption obeys Langmuir adsorption isotherm. Quantum structure–activity relationships have been studied. The surface morphology of low-carbon steel samples was investigated.

Corrosion inhibition of carbon steel in hydrochloric acid solution using pomegranate leave extracts

The inhibitive action and adsorption behaviour of pomegranate leave extract (PGLE) on corrosion of carbon steel in 1M HCl solution at 293–333 K was investigated through chemical (weight loss measurements), electrochemical (potentiodynamic polarisation) and surface analysis [Fourier transform infrared (FTIR) and X-ray diffraction (XRD)] methods. Results obtained shows that the adsorption of PGLE molecules on the C steel surface obeyed the Langmuir adsorption isotherm and acts as mixed type inhibitor for C steel in 1M HCl with anodic as its dominant inhibitor at high concentration. The inhibitory property of the extract was discussed in terms of the mechanism by which its components adsorb onto the C steel surface. Activation energy of corrosion and other thermodynamic parameters such as standard free energy, standard enthalpy and standard entropy of the adsorption process as well as FTIR and XRD examinations of the electrode surface revealed that the corrosion inhibition of C steel in 1M HCl in the presence of PGLE is mainly controlled by the physical adsorption process.

Corrosion Behavior of Austenitic Stainless Steel in Hydrochloric Acid Solution and Flow

The corrosion behaviors of austenitic stainless steels, 304 and 316L as a contrast material, are investigated in hydrochloric acid corrosion under different conditions including immersion corrosion, single-phase flow and two-phase flow, respectively. The corrosion mass loss test and electrochemical test were carried out to evaluate the influence of medium temperature and concentration. The specimen surface morphologies and chemical compositions were obtained using scanning electron microscope to analyze the corrosion mechanism. The results show that the static corrosion rates of 304 and 316L steels and erosion corrosion rates of 304 steel increase obviously with the medium temperature increasing, but, the effect of hydrochloric acid concentration on their corrosion rate is less than that of the temperature. The corrosion current density values of 304 stainless steel increase and its passivation region of the polarization curve becomes narrowing and disappeared as the medium temperature increase. Uniform corrosion is the main way found on the surfaces of the stainless steels at room temperature in the hydrochloric acid solution. However, the selective corrosion occurs on their surface with the medium temperature increasing, and the higher temperature and concentration of corrosion medium, the more serious selective corrosion.

Evaluation of an Expired Non-Toxic Amlodipine Besylatedrug as Corrosion Inhibitor for Low Carbon Steel in Hydrochloric Acid Solutions

Evaluation of an Expired Non-Toxic Amlodipine Besylatedrug as Corrosion Inhibitor for Low Carbon Steel in Hydrochloric Acid Solutions

Evaluation of an Expired Non-Toxic Amlodipine Besylatedrug as Corrosion Inhibitor for Low Carbon Steel in Hydrochloric Acid Solutions.

Evaluation of an Expired Non-Toxic Amlodipine Besylatedrug as Corrosion Inhibitor for Low Carbon Steel in Hydrochloric Acid Solutions.

Ionic liquids based gemini cationic surfactants as corrosion inhibitors for carbon steel in hydrochloric acid solution

Three ionic liquid based gemini cationic surfactants; N1,N1,N1,N2,N2,N2-hexadodecylethane-1,2-diaminium bromide (G2IL), N1,N1, N1,N2, N2,N2-hexadodecylpropane-1,3-diaminium bromide (G3IL) and N1,N1,N1,N2,N2,N2-hexadodecylhexane-1,6-diaminium bromide (G6IL) were synthesized and their chemical structures were elucidated by using FTIR and 1HNMR spectroscopic techniques. The physicochemical properties of ionic liquids were measured and discussed. The critical micelle concentration and surface properties were determined from their surface tension measurements. The performance evaluation of the synthesized inhibitors on the carbon steel corrosion in acidic environment (1.0M HCl) have been investigated at different concentrations by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and weight loss techniques. Potentiodynamic polarization studies indicate that the studied inhibitors are mixed type inhibitors. For all inhibitors, the inhibition efficiency increases with increasing their concentration but decreases with increasing temperature. The adsorption of the ionic liquid surfactants on the metal surface and adsorption process obeys the Langmuir isotherm.

Investigation of the adsorption characteristics of some selected sulphonamide derivatives as corrosion inhibitors at mild steel/hydrochloric acid interface: Experimental, quantum chemical and QSAR studies

Five sulphonamides derivatives namely, sulphanilamide (SNA), sulphamethoxazole (SMX), sulphadimethoxine (SDM), sulphisoxazole (SSZ), and sulphamethizole (SMZ) have been selected as corrosion inhibitors for mild steel in hydrochloric acid solutions utilizing electrochemical techniques as well as theoretical method (using DFT). These compounds were found to protect mild steel through spontaneous adsorption on to mild steel surface, thereby blocking the active sites. The obtained thermodynamic and kinetic parameters deduced that sulphonamides adopt a Langmuir adsorption isotherm mechanism. Results from electrochemical impedance and potentiodynamic polarization showed exceptional correlation and revealed that these compounds are mixed-type inhibitors. The formation of the adsorption film on the mild steel surface was confirmed by SEM, EDS and FTIR. Quantum chemical calculations and quantitative structure activity relationship (QSAR) were also utilized to investigate the preferred reactive sites on the molecules of the sulphonamides and to correlate the experimentally determined inhibition efficiency with the theoretically determined inhibition efficiency. The results indicate that the preferred sites for interaction between the inhibition and metal surface would be the aromatic ring as well as the heteroatoms present in each sulphonamide. Five quantum chemical parameters are sufficient in the development of QSAR to provide a strong correlation between inhibition efficiency obtained theoretically and that obtained experimentally.

Analysis of Adsorption Properties and Corrosion Inhibition of Mild Steel in Hydrochloric Acid Solution by Synthesized Quinoline Schiff Base Derivatives

Two synthesized Schiff base derivatives were analyzed as corrosion inhibitors for mild steel in 1 N HCl solution by a series of known techniques such as electrochemical impedance spectroscopy, weight loss, potentiodynamic polarization, linear polarization and scanning electron microscopic at different inhibitor concentrations. The effects demonstrate that two Schiff base derivatives are excellent inhibitors, and inhibition efficiency accepts the order: SB1 > SB2. The adsorption of each inhibitor on metal surface obeys Langmuir adsorption isotherm. Two Schiff base derivatives acted as mixed-type inhibitors. The surface of the mild steel was examined by scanning electron microscope in the absence and presence of Schiff base derivatives.

Adsorption and corrosion inhibitive properties of P(2-aminobenzothiazole) on mild steel in hydrochloric acid media

Corrosion inhibition of mild steel in hydrochloric acid solutions using electropolymerized Poly 2-aminobenzothiazole, P(2ABT), was evaluated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy measurements at different temperature. Results showed that the inhibition efficiency increases with increasing the concentration of P(2ABT) up to 12.7 × 10−6 mol L−1 and decreases with raising the temperature. Polarization curves indicate that the studied compound acts as anodic inhibitor. Thermodynamic activation parameters for both dissolution and adsorption processes are calculated and discussed as well as the adsorption isotherms are calculated. Gibbs free energy value confirms the physical nature of the adsorption, also the mechanism of inhibition is discussed. Scanning electron microscopy is used to study the surface morphology of mild steel in hydrochloric acid solution in the absence and presence of 12.7 × 10−6 mol L−1 P(2ABT). Data obtained from all techniques are in a good agreement with each other.

Melon ( Cucumismelo ) and Groundnut ( Arachishypogaea ) peel extracts as corrosion inhibitors for mild steel in hydrochloric acid solution

The corrosion inhibition of mild steel in 2M hydrochloric acid solution by Melon ( Cucumismelo )(MPE) and Groundnut ( Arachishypohaea ) peel extracts (GPE) at room temperature has been investigated using weight loss method. Inhibition efficiencies of 94.40% and 92.64% for2M HCl concentration was observed for GPE and MPE respectively. Generally, the weight loss of the coupons decreases at different concentrations of HCl solutions while the inhibition efficiencies of the inhibitors (MPE and GPE) increased with increasing inhibitor concentrations. Keywords: Cucumismelo, Arachishypogaea , corrosion, inhibitors

A Study of N,N-Diethylammonium O,O′-Di(p-methoxyphenyl)dithiophosphate as New Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solution

N,N-Diethylammonium O,O′-di(p-methoxyphenyl)dithiophosphate (EAPP) as a new corrosion inhibitor was synthesized in the present work. The corrosion inhibition of EAPP in hydrochloric acid for carbon steel was evaluated by potentiodynamic polarization measurements, electrochemical impedance spectroscopy, weight loss measurements, and scanning electron microscopy. The results indicate that the EAPP is mixed type inhibitor, and the adsorption of EAPP on carbon steel surface obeys Langmuir isotherm. In addition, the inhibition efficiency increases with increasing the concentration of inhibitor and decreases with increasing the hydrochloric acid concentration, temperature, and storage time.

Facile synthesis and investigation of 1,8-dioxooctahydroxanthene derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution

For the first time, the corrosion inhibitive performance of some 1,8-dioxooctahydroxanthene derivatives is proposed.

L-Phenylalanine methyl ester hydrochloride as a green corrosion inhibitor for mild steel in hydrochloric acid solution and the effect of surfactant additive

Structure ofl-phenylalanine methyl ester hydrochloride.

Protection of stainless steel in hydrochloric acid solution containing hydrogen sulfide by inhibitors

The corrosion of chromium-nickel steel 1Kh18N9T in 2 М H2SO4 at t = 20–100°C was studied using the mass loss method. In addition, steel hydrogenation in the corrosive medium was measured by the vacuum extraction method. IFKhAN-92 (a 1,2,4-triazole derivative) and its combination with KI were studied as corrosion inhibitors. It was shown that 1Kh18N9T steel has low corrosion resistance in H2SO4 solutions, particularly at temperatures (t) close to 100°C. The steel corrosion rate is k = 1.7–727 g/(m 2 h) under the conditions studied and increases with increasing t. Steel hydrogenation occurs at t = 40– 100°C and is the strongest at 100°C (12 ml / 100 g). The presence of 15 mM H2S in the H2SO4 solution slows down steel corrosion (k = 2.8–274 g/(m 2 h)) but intensifies hydrogen absorption. The highest content of hydrogen absorbed in the metal (36 ml / 100 g) was observed at t = 40°C and 1 h exposure of the specimens. It has been shown that, by themselves, 5 mM IFKhAN-92 or 5 mM KI are not suitable for protection of 1Kh18N9T steel in the specified media, since IFKhAN-92 has low efficiency in H2SO4 solution without H2S, whereas, conversely, KI has low efficiency in H2SO4 solution containing H2S. However, their mixture shows versatile protection in these media. The formulation containing 2.5 mM IFKhAN-92 + 2.5 mM KI that suppresses steel corrosion in H2Scontaining medium up to 100С and totally prevents hydrogen absorption up to 60°C, inclusive, has been recommended for steel protection in H2SO4, both in the absence and in the presence of H2S. This mixture is particularly efficient in solutions without H2S where it inhibits steel corrosion in the entire t range studied while keeping the content of hydrogen in the metal at metallurgical level.

Capsicum extract as green corrosion extract for carbon steel in hydrochloric acid solutions

The extract of Capsicum have been evaluated as green extract for the corrosion of carbon steel in 1M HCl solution was investigated using weight loss, potentiodynamic polarization, ac electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (FEM) and energy dispersion spectroscopy (EDS) and scanning electron microscopy (SEM) methods of monitoring corrosion. The inhibitive property of the extract is attributed to the presence of Capsaicin and Ascorbic acid as major constituent in the extract. Measurements showed that this extract act as mixed-type extract. The inhibition efficiency was found to increase with extract concentration. Results obtained by various techniques are close to each other and maximum efficiency of 86 % is acknowledged at the extract concentration of 300 ppm. Langmuir isotherm model is found most suitable to explain adsorption behavior of extract for C-steel surface. Molecular adsorption of extract over C- steel surface is found responsible for corrosion inhibition of C- steel in acid.

Effect of Chemical Passivation Treatment and Flow on the Corrosion of 304 Stainless Steel in Hydrochloric Acid Solution

Effect of Chemical Passivation Treatment and Flow on the Corrosion of 304 Stainless Steel in Hydrochloric Acid Solution