Corrosion Inhibition Of Brass Research Articles

Improvement of corrosion resistance for brass in 3.5% NaCl media by using 4- fluorophenyl-2, 5-dithiohydrazodicarbonamide

Corrosion poses a significant challenge for numerous industries. The use of corrosion inhibitors is essential within these industries. The efficacy of environmentally friendly corrosion inhibitors should remain high even when used at low concentrations. In the present study, the compound 4- fluorophenyl-2,5- dithiohydrazodicarbonamide (FTSC) was used as a corrosion inhibitor for brass in 3.5% NaCl solution. The inhibitor efficiency was determined by using a series of electrochemical techniques such as open circuit potential (OCP), potential dynamic polarisation (PDP), linear polarisation resistance (LPR), and electrochemical impedance spectroscopy (EIS). All experimental tests have been done in stagnant conditions. The findings of the experiments revealed that the compound FTSC looked to be of the cathodic type. Furthermore, the maximum inhibitor efficiency was reached at 98.28% at 1 × 10-3 and at an immersion time of 1 h. The current density was reduced from 16.5 to 0.284 A.cm-2. The adsorption of compound on the brass surface in 3.5% NaCl solution obeyed the Langmuir isotherm with a low negative value of the standard Gibbs free energy of adsorption (-33.8 kJ/mol ΔGads (chemisorption and physisorption). The results confirmed that the compound FTSC can be used as a corrosion inhibitor for brass in 3.5% NaCl.

The electrochemical study of the garlic extract as a corrosion inhibitor for brass in the nitric acid solution

The aim of this study was to investigate the corrosion behavior of the brass alloy in the 1 M HNO3 solution with the different concentrations of the green inhibitor (Garlic extract). In the first step, the fourier transform infrared spectroscopy was used to identify the chemical composition of the inhibitor. The inhibition effect of the garlic extract on the corrosion behavior of the brass alloy was investigated by the polarization and electrochemical impedance spectroscopy test. The results of the polarization test showed that the garlic extract in the acidic environment acted as a mixed-type inhibitor, and with increasing the inhibitor concentration, the inhibitor efficiency increased from 60 % to 93.74 %. In addition, the results of the electrochemical impedance test revealed that by increasing the inhibitor concentration, the capacitance of the capacitor of electric double layer decreased, while the solution resistance increased. In follow, the effect of temperature on the corrosion behavior of the brass alloy with the presence of the garlic extract in the acidic solution was investigated using the electrochemical techniques as well. The results showed that by increasing the temperature, the inhibitor efficiency decreased from 93.74 % to 83.47 % at 3 g/L of inhibitor. Furthermore, the surface of the sample after dipping in the nitric acid solution containing garlic extract was examined using a scanning electron microscopy and an atomic force microscopy. The adsorption of the inhibitor molecules on the surface of the brass alloy at all temperatures was studied using the Langmuir adsorption isotherm and then both chemical and physical mechanisms were observed due to the adsorption of the garlic extract on the surface of the brass alloy in the 1 M HNO3 solution.

Detailed experimental of indazole derivatives as corrosion inhibitor for brass in acidic environment: electrochemical/theoretical/surface studies

Detailed experimental of indazole derivatives as corrosion inhibitor for brass in acidic environment: electrochemical/theoretical/surface studies

Understanding imidazole derivatives effect as a corrosion inhibitor for brass in nitric acid: a combined experimental and theoretical assessments

ABSTRACT This paper presents a new study on imidazole derivatives namely 1H-imidazole (IM), N-methylimidazole (MIM) and 1H-benzimidazole (BIM) as a corrosion inhibitor for brass in nitric acid medium. Electrochemical results demonstrate that the inhibition increases with a high concentration of imidazole derivatives; the inhibitory efficiency reaches a maximum of 94% at 10–2 mol L−1 for BIM. SEM morphology and EDS analysis show that these derivatives are adsorbed onto the brass interface, the brass sample is effectively protected and the surface becomes relatively flat, which is more significant in the presence of 1H-benzimidazole. FTIR results confirm the retention of BIM on the interface of Cu-Zn alloys. In addition, quantum chemistry calculation manifests that the three derivatives can reveal high anticorrosion properties. Molecular dynamics simulation data manifest that the three imidazole derivatives can be adsorbed at the brass surface in a paralleled way, and have large binding energy. Highlights A new action of imidazole derivatives to mitigate brass corrosion was explored in HNO3. BIM showed inhibitory efficiency more than 94% in HNO3 solution. The inhibition mechanism is studied using SEM/EDS surface analysis and FTIR analysis. The calculated adsorption energies are ranked in the following order: BIM > MIM > IM. Theoretical and experimental results lead to used imidazole derivatives as potential corrosion inhibition for brass in solution.

Perezone as corrosion inhibition of brass in the presence of sulfides for preservation of metal artifacts

Perezone as corrosion inhibition of brass in the presence of sulfides for preservation of metal artifacts

Corrosion Inhibition of Brass by Biochemical Process in Circulating Cooling Water System

Controlling the corrosion rate of metal materials is one of the key issues in circulating cooling water treatment. In recent years, the treatment of circulating cooling water by microorganisms has become a research hotspot. Compared with the traditional chemical treatment, microbial treatment is an environmentally friendly technology. In this paper, the effects of ammonia nitrogen concentration, microbial dosage and aeration intensity on copper corrosion rate were studied. In order to analyze the experimental data more comprehensively, a full factor experimental design was used to investigate the effects of ammonia nitrogen concentration, microbial dosage and aeration intensity on copper corrosion. The corrosion rate of copper was less than the national standard (< 0.005 mm / a), in which ammonia nitrogen concentration and aeration intensity were significant factors (P < 0.05), and the interaction between ammonia nitrogen concentration and aeration intensity was also significant (P < 0.05), After optimization, the regression rate of the model increased from 85.02% to 92.41%.

The Interface Characterization of 2-Mercapto-1-methylimidazole Corrosion Inhibitor on Brass

This work presents a detailed surface analytical study and surface characterization, with an emphasis on the X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) analyses of 2‑mercapto‑1‑methylimidazole (MMI) as a corrosion inhibitor for brass. First, the electrochemical measurements demonstrated a corrosion inhibition effect of MMI in a 3 wt.% NaCl solution. Next, the formation of the MMI surface layer and its properties after 1 month of immersion was analyzed with attenuated total reflectance–Fourier-transform infrared spectroscopy, atomic force microscopy, field-emission scanning electron microscopy, and contact angle analysis. Moreover, to gradually remove the organic surface layer, a gas cluster ion beam (GCIB) sputtering source at different accelerated voltages and cluster sizes was employed. After each sputtering cycle, a high-resolution XPS analysis was performed. Moreover, an angle‑resolved XPS analysis was carried out for the MMI-treated brass sample to analyze the heterogeneous layered structure (the interface of the MMI organic/inorganic brass substrate). The interface properties were also investigated in detail using ToF-SIMS for spectra measurements and 2D imaging. Special attention was devoted to the possible spectral interferences for MMI‑related species. The thermal stability of different MMI-related species using molecular-specific signals without possible spectral interferences was determined by performing a cooling/heating experiment associated with ToF-SIMS measurements. It was shown that these species desorbed from the brass surface in the temperature range of 310–370 °C.

Time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy study of 2-phenylimidazole on brass.

This work presents the first surface analysis investigation of 2-phenylimidazole (PhI) as a corrosion inhibitor for brass in a 3 wt.% NaCl solution using time-of-flight secondary ion mass spectrometry (TOF-SIMS) and X-ray photoelectron spectroscopy (XPS). A time-of-flight secondary ion mass spectrometer was used to describe the elemental and molecular specific signals on the brass surface. Gas cluster/monoatomic ion beam depth profiling and two-dimensional (2D) imaging showed the surface properties of the PhI surface layer. In addition, detailed XPS was used to describe the element-specific signals on the brass surface. Furthermore, principal component analysis demonstrated the distribution of the different phases of the surface. Finally, the applicability of PhI in hot corrosion studies was suggested by a thermal stability experiment. TOF-SIMS measurements showed an intense positive-ion TOF-SIMS signal for protonated PhI, i.e. C9 H9 N2 + at m/z 145.07. Moreover, there was an intense negative-ion TOF-SIMS signal for deprotonated PhI, i.e. C9 H7 N2 ¯ at m/z 143.06. Gas cluster ion beam sputtering associated with the analysis of the XPS-excited Cu L3 M4,5 M4,5 revealed a connection between Cu(I) and PhI to form organometallic complexes. The formation of the organometallic complexes with Cu and Zn metal atoms/ions was identified using TOF-SIMS in positive and negative polarity mode: PhI-Cu, PhI-Cu2 , PhI-Zn, and PhI-Zn2 complexes were present on the brass surface. The TOF-SIMS measurements were supported by XPS measurements.

Comparison of the Corrosion Behavior of Brass in TiO2 and Al2O3 Nanofluids.

The corrosion behavior of brass in TiO2 and Al2O3 nanofluids using a simulated cooling water (SCW) as the base solution and sodium dodecyl benzene sulfonate (SDBS) as the dispersant was studied by electrochemical measurements and surface analysis in this paper. It was found that SDBS could be adsorbed on the brass surface to form a protective film and have a corrosion inhibition effect on brass in SCW. In the SCW-SDBS-TiO2 nanofluid, some negatively charged TiO2 nanoparticles were attached to the brass surface and no obvious SDBS adsorption film was found, and the SDBS in this nanofluid had almost no corrosion inhibition on brass. In the SCW-SDBS-Al2O3 nanofluid, the brass surface was covered by a uniformly distributed SDBS film containing some Al2O3 nanoparticles which were positively charged, and the corrosion inhibition of brass was significantly improved in this nanofluid. It is concluded that the adsorption of SDBS on the brass surface in nanofluids is related to the charge status of the nanoparticles, which makes brass have different corrosion resistance in various nanofluids.

Corrosion inhibition of brass in phosphoric acid solution by 2-(5-methyl-2-nitro-1H-imidazol-1-yl)ethyl benzoate

Abstract A new 2-(5-methyl-2-Nitro-1H-imidazol-1-yl)ethyl benzoate (IMDZ-B) was synthesized and characterized using elemental analyses, NMR and Fourier transform infra-red (FTIR) techniques. Its effect on brass corrosion in 1.0 M H3PO4 solution was investigated by using electrochemical measurements coupled with X-ray diffraction analysis (XRD), Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX). The polarization measurements showed that the IMDZ-B acts as a mixed type inhibitor. Indeed, it is found that the IMDZ-B compound is a very good inhibitor, which its inhibition efficiency increases with concentration to reach a maximum of 99.5% at 10−3 M. In addition, the obtained electrochemical parameters from impedance indicated that the IMDZ-B molecules act by adsorption on metallic surface. This adsorption was found to obey Langmuir's adsorption isotherm. However, the temperature effect on the performance of IMDZ-B was also studied. It is found that the IMDZ-B takes its performance at high temperature. In addition, the obtained kinetic and thermodynamic parameters showed that the IMDZ-B molecules act via two adsorption modes, physisorption and chemisorptions, and its process is endothermic and spontaneous. Finally, the XRD and SEM/EDX analyses confirmed the electrochemical obtained results. SEM micrograph of brass surface after 16 h of immersion in 1.0 M H3PO4 solution (a) without and (b) with 10−3 M of IMDZ-B.

Adsorption and inhibitive properties of Apigenin derivatives as eco-friendly corrosion inhibitors for brass in nitric acid solution

Six apigenin derivatives were synthesized through Mannich reaction by using apigenin isolated from Hypericum perforatum as raw material. The inhibition performance of these apigenin derivatives were investigated as eco-friendly corrosion inhibitors for brass in 1.0 M HNO3 solution by means of weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) measurements. The obtained results show that the as-synthesized apigenin derivatives act as efficient inhibitors for brass in 1.0 M HNO3. The inhibition efficiency increased with the increase in inhibitor concentration but decreased with a rise in temperature. The inhibition efficiency higher than 90% for these compounds was found even at a low concentration of 30 mg L−1, which is superior to the commonly used synthetic organic corrosion inhibitors for brass in acidic media. Electrochemical studies indicate that the inhibitors are of mixed type but predominantly cathodic in HNO3 solution. The inhibitor performance depends on the adsorption of the molecules on the metal surface. The thermodynamic parameters for inhibiting process were calculated according to the statistical model. The calculated thermodynamic parameters revealed that the adsorption of these inhibitors on brass surface was spontaneous, controlled by physiochemical processes. The adsorption behaviour of these apigenin derivatives on the surface of brass was analyzed utilizing SEM, AFM, XPS, and Raman spectroscopy measurements. The results confirmed that the apigenin derivatives prevented corrosion of brass by forming protective layer on its surface.

Experimental and Theoretical Studies on the Corrosion Inhibition of Brass in Hydrochloric Acid by N-(4-((4-Benzhydryl Piperazin-1-yl) Methyl Carbamoyl) Phenyl) Furan-2-Carboxamide

The corrosion inhibition effect of N-(4-((4-Benzhydryl piperazin-1-yl) methyl Carbamoyl) Phenyl) Furan-2-Carboxamide (BFC) on brass in 1M HCl has been investigated using weight loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The result reveals that BFC acts as a mixed type corrosion inhibitor with more pronounced effect on anodic domain and the inhibition efficiency of BFC increases with increase in temperature ranges from 30°C to 60°C. AC impedance implies thatRctvalue of BFC increases with increase in concentration. CV indicates that the addition of inhibitor controls the oxidation of the copper on the brass metal. The structural confirmation of BFC was carried out by the spectral studies like FT-IR,1H NMR,13C NMR, and the molecular weight was confirmed by LC-MS. Surface characterization of brass with BFC was analysed using scanning electron microscope (SEM). Quantum chemical parameter was used to calculate the electronic properties of BFC in order to confirm the correlation between the inhibitor effect and molecular structure of BFC. BFC has more negative charge on nitrogen and oxygen atom, which facilitates the adsorption of BFC on the surface of brass.

Corrosion Inhibition of Brass in 0.5 M HNO3 by 3-hydroxy-3-(4-chlorophenyl-1-(4-sulphonato (sodium salt)) Phenyl Triazene (HCST): Adsorption and Thermodynamic Study

Corrosion Inhibition of Brass in 0.5 M HNO3 by 3-hydroxy-3-(4-chlorophenyl-1-(4-sulphonato (sodium salt)) Phenyl Triazene (HCST): Adsorption and Thermodynamic Study

Valoniopsis pachynema Extract as a Green Inhibitor for Corrosion of Brass in 0.1 N Phosphoric Acid Solution

The effect of marine alga Valoniopsis pachynema extract on corrosion inhibition of brass in phosphoric acid was investigated by weight-loss method, potentiodynamic polarization, and electrochemical impedance spectroscopy studies. The inhibition efficiency is found to increase with increasing concentration of extract and decreases with rise in temperature. The activation energy, thermodynamic parameters (free energy, enthalpy, and entropy change) and kinetic parameters (rate constant and half-life) for inhibition process were calculated. These thermodynamic and kinetic parameters indicate a strong interaction between the inhibitor and the brass surface. The inhibition is assumed to occur via adsorption of inhibitor molecules on brass surface, which obeys Temkin adsorption isotherm. The adsorption of inhibitor on the brass surface is exothermic, physical, and spontaneous, and follows first-order kinetics. The polarization measurements showed that the inhibitor behaves as a mixed type inhibitor and the higher inhibition surface coverage on the brass was predicted. Inhibition efficiency values were found to show good trend with weight-loss method, potentiodynamic polarization, and electrochemical impedance spectroscopy studies. Surface study techniques (FT-IR and SEM) were carried out to ascertain the inhibitive nature of the algal extract on the brass surface.

CHAETOMORPHA ANTENNIA EXTRACT AS A GREEN INHIBITOR FOR CORROSION OF BRASS IN 0.1 N PHOSPHORIC ACID SOLUTION

The effect of marine algae Chaetomorpha antennia extract on corrosion inhibition of brass in phosphoric acid was investigated by weight-loss method, potentiodynamic polarization and electrochemical impedance spectroscopy studies. The inhibition efficiency is found to increase with increasing concentration of extract and decreases with rise in temperature. The activation energy, thermodynamic parameters (free energy, enthalpy and entropy change) and kinetic parameters (rate constant and half-life) for inhibition process were calculated. These thermodynamic and kinetic parameters indicate a strong interaction between the inhibitor and the brass surface. The inhibition is assumed to occur via adsorption of inhibitor molecules on the brass surface, which obeys Temkin adsorption isotherm. The adsorption of inhibitor on the brass surface is exothermic, physical, and spontaneous, follows first order kinetics. The polarization measurements showed that the inhibitor behaves as a mixed type inhibitor and the higher inhibition surface coverage on the brass was predicted. Inhibition efficiency values were found to show good trend with weight-loss method, potentiodynamic polarization and electrochemical impedance spectroscopy studies. SEM was carried out to ascertain the inhibitive nature of the algal extract on the brass surface.

Corrosion Inhibition of Brass in Industrial Cooling Water Systems

Corrosion Inhibition of Brass in Industrial Cooling Water Systems

Mitigation of Sulfide Attach on α-Brass Surface by Using Sodium (Z)-4- Oxo-4-p-Tolyl-2-Butenoate

The corrosion inhibition efficiency of α-brass was evaluated in unpolluted and sulfide polluted 3.5% NaCl. The Sodium (Z)-4-Oxo-4-p-Tolyl-2-Butenoate (SOTB) has been used as safe organic corrosion inhibitor instead of benzotriazole. The electrochemical methods were used to monitor the effect of inhibitor on corrosion inhibition of brass. The results showed that this inhibitor act as cathodic and anodic inhibitor for the surface of brass in both chloride and sulfide polluted medium. Brass electrodes were subjected to characterization by SEM and EDS to prove the probable mechanism. The inhibition efficiency and the persistence of protective film are depends on the inhibitor concentration in both chloride and sulfide media.

Study on Corrosion Inhibition of Brass in Water Using Horse Tail Herb as Green Inhibitor

Study on Corrosion Inhibition of Brass in Water Using Horse Tail Herb as Green Inhibitor

Corrosion inhibition of brass in 3% NaCl solution by 3-methyl-1,2,4-triazol-5-thione

In this work, a new organic compound as methyl-1,2,4-triazole-5-thione (MTS) was tested as brass corrosion inhibitor. It was synthesised and characterised using IR, HNMR and CNMR spectra. The synthesised inhibitor was tested against brass 60Cu–Zn corrosion in 3% NaCl solution using potentiodynamic polarisation and impedance spectroscopy (EIS) as electrochemical methods. In addition, the SEM and EDX were used to characterise the metal surface state. It has been observed that the inhibition efficiency increases with increasing concentration of MTS. The potentiodynamic polarisation results revealed that the inhibitor acts as mixed type one. The EIS spectra indicate that the charge–transfer resistance value increases with increasing MTS concentrations. Scanning electron microscopy results reveal that MTS acts as a good inhibitor. The inhibition efficiency seems to be interpreted by formation of a protective layer on brass surface.

Effect of 5-Methylbenzotriazole on the Corrosion Inhibition of Brass in NaCl Solution

The corrosion behavior of brass in the presence of inhibitor namely 5-methyl benzotriazole (MBTA) has been investigated in 3% NaCl medium. The inhibition efficiency of MBTA was evaluated from chemical and electrochemical techniques. Experimental studies showed that MBTA reduces markedly the corrosion of brass in 3% NaCl solution and this reduction in corrosion rates enhances with increasing concentration of MBTA. Weight loss study revealed that the formulation consisting of 150 ppm of MBTA showed 71% inhibition efficiency. Polarization studies also revealed that the inhibitor act as mixed type for brass in chloride solution. The characterization of corrosion product on brass in presence of MBTA was analysed by FTIR.