Showing papers on "Carbon steel published in 2022"
TL;DR: In this paper , a new aromatic Schiff base with azo linkage has been synthesized and characterized by FT-IR, 1H-NMR, and 13C NMR spectroscopy.
Abstract: Abstract A new aromatic Schiff base with azo linkage has been synthesized and characterized by FT-IR, 1H-NMR, and 13C-NMR spectroscopy. The new compound 2-(((5-mercapto-1,3,4-thiadiazol-2-yl)imino)methyl)-4-(p-tolyldiazenyl)phenol (5, denoted as AT) was tested as a carbon steel corrosion inhibitor in 1 M H2SO4. The presence of AT in 0.04 mM concentration at 303 K achieved excellent inhibition efficiency values, 96.6 and 97.4% by potentiodynamic polarization and weight loss measurements, respectively. The adsorption process of AT on carbon steel surface was found to obey Langmuir adsorption isotherm with the highest Kads value 476,190 M −1 at 313 K, and ΔG values −25.53, −26.49, −25.97, and −25.78) kJ mol−1 over the studied range of temperatures 303–333 K, indicating the spontaneous formation of stable protection film through a strong adsorption process. Density function theory (DFT) studies were employed for further investigations about the nature of the interaction between the molecules of AT (both of its tautomers) and metal surface. SEM and AFM analysis were used to confirm the inhibition by comparing the morphology of the corroded surface with the inhibited one.
55 citations
TL;DR: In this article , the acquired kapok leaves extract (KLE) and synergistic iodide ions are firstly used as novel environmental-friendly corrosion inhibitors for Q235 carbon steel in 0.5 mol/L H2SO4 solution.
49 citations
TL;DR: In this article, carbon dots (CDMU and CDMH) were synthesized, characterized and applied as corrosion inhibitor for mild steel (MS) in 15% HCl solution, and the characterization of both inhibitors was carried out by FTIR, UV-vis, photoluminescence, XPS and TEM.
48 citations
TL;DR: In this paper, N-doped carbon quantum dots (NCQDs) were synthesized by a hydrothermal method using folic acid and o-phenylenediamine as precursors.
47 citations
TL;DR: In this article , N-doped carbon quantum dots (NCQDs) were synthesized by a hydrothermal method using folic acid and o-phenylenediamine as precursors.
47 citations
TL;DR: In this paper , carbon dots (CDMU and CDMH) were synthesized, characterized and applied as corrosion inhibitor for mild steel (MS) in 15% HCl solution, and the characterization of both inhibitors was carried out by FTIR, UV-vis, photoluminescence, XPS and TEM.
44 citations
TL;DR: In this paper , Me-modified carbon dots (Me-CDs) were synthesized by hydrothermal method and used as effective corrosion inhibitor for Q235 carbon steel in 3.5 wt% sodium chloride (NaCl) solution.
43 citations
TL;DR: In this paper , a gossypol-indole modification (GIM) is introduced as a green corrosion inhibitor for low-carbon steel in an aggressive alkaline-saline environment.
42 citations
TL;DR: In this paper , the atmospheric corrosion of carbon steels was monitored at six different sites (and hence, atmospheric conditions) using Fe/Cu-type atmospheric corrosion monitoring technology over a period of 12 months.
Abstract: Abstract In this work, the atmospheric corrosion of carbon steels was monitored at six different sites (and hence, atmospheric conditions) using Fe/Cu-type atmospheric corrosion monitoring technology over a period of 12 months. After analyzing over 3 million data points, the sensor data were interpretable as the instantaneous corrosion rate, and the atmospheric “corrosivity” for each exposure environment showed highly dynamic changes from the C1 to CX level (according to the ISO 9223 standard). A random forest model was developed to predict the corrosion rate and investigate the impacts of ten “corrosive factors” in dynamic atmospheres. The results reveal rust layer, wind speed, rainfall rate, RH, and chloride concentration, played a significant role in the corrosion process.
37 citations
TL;DR: In this paper , a new organic compound type epoxy resin was synthesized, namely N, N, 1-tri(oxiran-2-ylmethoxy)-5-((oxirans-2]-methoxide)thio)-1H-1,2,4-triazol-3-amine (TTA) used as corrosion inhibitor of carbon steel C38 in an acid medium 1 M HCl.
37 citations
TL;DR: In this article , the soybean extract (SE) was firstly investigated for corrosion inhibition characteristics on carbon steel in sulfuric medium, and the weight loss and electrochemical methods were used to research the inhibition performance and adsorption properties of SE in combination with halide ions.
TL;DR: The use of plant extracts as corrosion inhibitors is a cost-effective corrosion mitigation strategy for carbon steel as discussed by the authors , and there is an increased focus on developing and using low-cost, biodegradable and environmentally friendly inhibitor formulations.
Abstract: Abstract The use of corrosion inhibitors is a cost-effective corrosion mitigation strategy for carbon steel. There is an increased focus on developing and using low-cost, biodegradable and environmentally friendly inhibitor formulations. Plant-based extracts have been evaluated in many studies using a multitude of electrochemical methods and characterisation techniques. Although plant extracts appear as promising alternatives for commercially synthesised inhibitor formulations, a significant amount of optimisation is required. The majority of the research on plant extracts does not elucidate the effect of other synergistic combinations in commercial inhibitor formulations. Therefore, further development of plant extracts as corrosion inhibitors is of significant interest.
TL;DR: In this article , the synergistic effects of deposits and sulfate reducing bacteria (SRB) on the corrosion of a carbon steel were clarified by purposely designing four groups of experiments, and it was shown quantitatively that deposits and SRB contribute synergistically approximately 75% and 49% to uniform and localized corrosion, respectively.
TL;DR: In this article , the mainstay of corrosion inhibitors studies involved, including the corrosion and inhibition mechanism of carbon steel/HCl solution systems, evaluation methods of corrosion inhibition efficiency, adsorption isotherm models, adaption thermodynamic parameters QC calculations, MD/MC simulations, and the main characterization techniques used.
Abstract: Most studies on the corrosion inhibition performance of organic molecules and (nano)materials were conducted within “carbon steel/1.0 M HCl” solution system using similar experimental and theoretical methods. As such, the numerous research findings in this system are sufficient to conduct comparative studies to select the best-suited inhibitor type that generally refers to a type of inhibitor with low concentration/high inhibition efficiency, nontoxic properties, and a simple and cost-economic synthesis process. Before data collection, to help readers have a clear understanding of some crucial elements for the evaluation of corrosion inhibition performance, we introduced the mainstay of corrosion inhibitors studies involved, including the corrosion and inhibition mechanism of carbon steel/HCl solution systems, evaluation methods of corrosion inhibition efficiency, adsorption isotherm models, adsorption thermodynamic parameters QC calculations, MD/MC simulations, and the main characterization techniques used. In the classification and statistical analysis section, organic compounds or (nano)materials as corrosion inhibitors were classified into six types according to their molecular structural characteristics, molecular size, and compound source, including drug molecules, ionic liquids, surfactants, plant extracts, polymers, and polymeric nanoparticles. We outlined the important conclusions obtained from recent literature and listed the evaluation methods, characterization techniques, and contrastable experimental data of these types of inhibitors when used for carbon steel corrosion in 1.0 M HCl solution. Finally, statistical analysis was only performed based on these data from carbon steel/1.0 M HCl solution system, from which some conclusions can contribute to reducing the workload of the acquisition of useful information and provide some reference directions for the development of new corrosion inhibitors.
TL;DR: In this article , the corrosion inhibition of C38 steel in molar hydrochloric acid was examined using N-Propargyl Saccharin (NPS) as an inhibitor.
TL;DR: In this paper , the chemical composition of the methanolic extract of Ammi visnaga umbels (AVU) was evaluated by gas chromatography coupled with mass spectrometry (MS) and applied for corrosion inhibition of carbon steel (CS) in 1.0 mol/L HCl using chemical and electrochemical techniques along with scanning electron microscope (SEM) and theoretical calculations.
TL;DR: In this paper , two nonionic surfactants were prepared followed by structure confirmation using H1NMR, IR and so their surface activity were studied and the application of these compounds in the field of acid corrosion inhibitors was investigated by several empirical and computational methods.
TL;DR: In this article , the synergism of two eco-friendly amino acids (L-histidine, L-cysteine) and thiourea on the corrosion of N80 carbon steel in CO 2 -containing environment was studied by electrochemical tests and surface analysis.
TL;DR: In this paper , Artemisia argyi leaves extract (ALE) was used as a high-efficiency corrosion inhibitor of carbon steel in HCl solution, and the functional groups of ALE were characterized by Fourier transform infrared spectroscopy (FTIR).
TL;DR: In this article , the effect of electrolyte presence on the corrosion evolution and stress corrosion cracking (SCC) behavior of E690 steel in the simulated marine environment is investigated, and the steel exhibits the highest and lowest corrosion rate in splash and immersion environment, respectively, attributed to the differences in oxygen availability, rust layer property, and scour stress.
TL;DR: The soxhlet extraction method was used to prepare the extract of Cinnamoum tamala (C. tamala) leaves extract for low carbon steel (LCS) in the solution of 0.5 M H2SO4 was examined by Eletrochemical impedance spectroscopy, Tafel and gravimetric loss studies as mentioned in this paper .
TL;DR: In this article , a triple functional filler was constructed by first modifying basalt scales (Bt) with polydopamine (PDA) to introduce active sites, followed by in situ growth of molybdate-loaded layered double hydroxide (LM) on the surface of PDA-modified basalt.
TL;DR: In this article , a novel organic corrosion inhibitor, named 3, 5-dimethyl-1H-pyrazol-1-yl m (4-((4-hydroxybenzylidene) amino) phenyl) methanone (DPHM) has been effectively synthesized and characterized.
Abstract: A novel organic corrosion inhibitor, named 3, 5-dimethyl-1H-pyrazol-1-yl m (4-((4-hydroxybenzylidene) amino) phenyl) methanone (DPHM) has been effectively synthesized and characterized. The diagnosis of functional groups and constituents of DPHM has been conducted by FTIR, 1H NMR, and 13C NMR. The inhibitor efficacy for low-carbon steel in 1 M HCl was evaluated by using weight loss and electrochemical techniques. The inhibition efficiency was increased with increasing the temperature and DPHM concentrations. The inhibition efficiency approaches a maximum value of 89.5% at 400 ppm of DPHM and 60 °C. The efficiency of the inhibitor was attributed to the formation of a protective mono-layer on the steel surface. The Langmuir adsorption isotherm was used to inspect the adsorption process mechanism. Theoretical quantum chemical simulations were used to investigate the mechanism of inhibition. The results revealed that the DPHM was the donor of electron, while the steel surface was an electron acceptor. Mathematical and statistical modelling were used as powerful tool for data representation. Exponential model, with 0.992 correlation coefficient, was the most accurate one.
TL;DR: In this article , a novel seawater and sea sand concrete (SSC)-filled fiber-reinforced polymer (FRP)-carbon steel composite tube column (SFSCT) was subjected to cyclic axial compression loadings.
TL;DR: Two imidazoline derivatives (OI and MOI) were synthesized as highly efficient inhibitors, and their inhibition performances and mechanisms in CO2-containing solution were studied using weight loss measurements, electrochemical tests, surface analysis and theoretical calculations as discussed by the authors.
TL;DR: In this paper, individual Al2O3 and Cr 2O3 coatings and composite coatings were applied on carbon steel by atmospheric plasma spraying method and the results showed that the Cr2O 3 coating exhibited the best corrosion resistance, due to the densest microstructure and highest adhesion strength.
TL;DR: In this paper , the performance of PCB2 as a green corrosion inhibitor was evaluated by electrochemical and gravimetric tests and the binding active sites and activities thereof on the steel surface were illustrated by quantum chemistry, and the equilibrium configuration was predicted by molecular dynamics simulation.
TL;DR: In this article , the anticorrosion effect of two benzamide derivatives on C-steel in 1 M HCl was studied, and the polarization results showed that (HBEDA) and (HBDETA) are mixed-type inhibitors.
TL;DR: In this article , the corrosion of carbon steel in 1.0 M HCl solutions containing either 1,4-bis(2-(2-hydroxyethyliminomethyl)phenyl)piperazine (1) or its reduced form, 1, 4-bis (2-hexyl)-phenyl)-piperamide (2), as possible corrosion inhibitors, were compared to a solution containing no (1)- or (2)-concentrations of inhibitors, and various concentrations of inhibitors were used to explore the inhibition ability of synthesized materials against carbon steel corrosion.
TL;DR: In this article , a pyrimidine derivative, 5-acetyl-4-[4-(dimethylamino)phenyl]-6-methyl-3,4-dihydropyrimidin-2(1H)-one (ADP), has been designed and synthesized.