Showing papers on "Carbon steel published in 2018"
TL;DR: Electrochemical impedance spectroscopy results showed an increase in polarization resistance which supported the adsorption of inhibitors on the mild steel surface, and the data of quantum chemical calculations and molecular dynamics simulation supported the experimental findings.
202 citations
TL;DR: The role of biogenic H 2 S in the microbiologically influenced corrosion (MIC) of carbon steel was investigated in this article, where Desulfovibrio vulgaris (ATCC 7757), a sulfate reducing bacterium, was tested against C1018 carbon steel in anaerobic vials with three different sizes, each filled with 40mL of ATCC 1249 culture medium, providing headspace volumes of 10mL, 85mL and 160mL, respectively for H 2 s to escape.
200 citations
TL;DR: In this article, a literature review summarizes the state-of-the-art, reporting corrosion rate data for a broad range of cement types, w/b ratios and environmental conditions.
148 citations
TL;DR: Density functional theory calculations (DFT) showed that the effectiveness of the inhibitive actions of the studied compounds correlates well with their electron donating ability, whilst Monte Carlo simulations revealed that the extent and favourability of adsorption of inhibitor molecules on the carbon steel surface establish their corrosion inhibition performances.
Abstract: Three new organic compounds primarily based on 8-hydroxyquinoline have been successfully synthesized and characterized via different spectroscopic methods (FTIR, 1H, and 13C NMR). The synthesized compounds, namely 5-propoxymethyl-8-hydroxyquinoline (PMHQ), 5-methoxymethyl-8-hydroxyquinoline (MMHQ) and 5-hydroxymethyl-8-hydroxyquinoline (HMHQ), were evaluated as corrosion inhibitors for carbon steel in 1 M HCl solution using electrochemical impedance spectroscopy, potentiodynamic polarization and weight loss measurements at 298 K. Electrochemical measurements confirmed that the newly synthesized 5-alkoxymethyl-8-hydroxyquinoline derivatives are mixed type corrosion inhibitors and confirmed maximum protection efficiencies of 94, 89 and 81% for PMHQ, MMHQ, and HMHQ, respectively, at the optimum concentration of 10−3 M. The EIS spectra confirmed a slightly depressed semi-circle profile with a single time constant in Bode diagrams for the three organic compounds over the whole concentration and temperature ranges studied. The adsorption of PMHQ, MMHQ, and HMHQ on the carbon steel surface followed the Langmuir adsorption isotherm. In addition, the kinetic and thermodynamic parameters for carbon steel corrosion and inhibitor adsorption, respectively, were determined and discussed. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses supported the formation of a protective film on carbon steel in the presence of PMHQ, MMHQ, and HMHQ. Density functional theory calculations (DFT) showed that the effectiveness of the inhibitive actions of the studied compounds correlates well with their electron donating ability, whilst Monte Carlo simulations revealed that the extent and favourability of adsorption of inhibitor molecules on the carbon steel surface establish their corrosion inhibition performances.
137 citations
TL;DR: In this article, Nitrogen doped carbon dots (NCDs) were synthesized and used for inhibiting the corrosion of Q235 carbon steel in hydrochloric acid (HCl) solution.
112 citations
TL;DR: In this article, two isoxazolidine derivatives, namely 5-(benzo[d][1,3]dioxol-5-ylmethyl)-2-tetradecyl (BDMTI) and 5-(4-hydroxy-3-methoxybenzyl)-2 -hexylmethyl (HMBTI), were synthesized and characterized using FTIR, C-NMR, H-NPM, and elemental analysis.
Abstract: Two isoxazolidine derivatives namely 5-(benzo[d][1,3]dioxol-5-ylmethyl)-2-tetradecyl isoxazolidine (BDMTI) and 5-(4-hydroxy-3-methoxybenzyl)-2-tetradecyl isoxazolidine (HMBTI) were synthesized and characterized using FTIR, C-NMR, H-NMR, and elemental analysis. The synthesized compounds were evaluated as corrosion inhibitors for API 5L X60 steel in 1 M HCl in the temperature range of 25–60 °C using gravimetric and electrochemical (Electrochemical Impedance Spectroscopy (EIS), Potentiodynamic Polarization (PDP) and Linear Polarization Resistance (LPR)) techniques. The effect of addition of a small amount of iodide ions on the corrosion inhibition performance of the compounds was also assessed. In addition, quantum chemical calculations and Monte Carlo simulations were employed to correlate the electronic properties of the compounds with the corrosion inhibition effect as well as to evaluate the adsorption/binding of the inhibitor molecules on the steel surface. Experimental results show that the two compounds inhibited the corrosion of carbon steel in an acid environment with HMBTI showing superior performance. The corrosion inhibition effect was found to be dependent on the inhibitors' concentration and temperature. Addition of iodide ions improves the inhibition efficiency considerably due to co-adsorption of the iodide ions and the inhibitors on the steel surface which was competitive in nature as confirmed from the synergistic parameter (S1) which was less than unity at higher temperature. Experimental and theoretical results are in good agreement.
102 citations
TL;DR: In this article, a non-linear finite element (FE) analysis and design of circular and square CFDST stub columns with external stainless steel under axial compression is presented, where nonlinear material property of stainless steel is considered, and verified through comparisons with experiments in terms of failure modes, load deformation histories and ultimate strength.
Abstract: Concrete-filled double skin steel tubular (CFDST) stub columns with external stainless steel and internal carbon steel tubes can be considered as new types of composite members and expected to combine the advantages of all three kinds of materials. This paper presents non-linear finite element (FE) analysis and design of circular and square CFDST stub columns with external stainless steel under axial compression. FE models are developed, where non-linear material property of stainless steel is considered, and verified through comparisons with experiments in terms of failure modes, load-deformation histories and ultimate strength. Behaviors of stainless steel composite columns are compared with that of columns with both carbon steel tubes. Parametric studies are conducted to investigate the influence of the outer stainless steel tube strength, concrete strength, inner carbon steel tube strength and hollow ratio on structural behavior of axially loaded columns in terms of loading and interaction performance.
100 citations
TL;DR: In this paper, the corrosion characteristics of a quenched and partitioned (Q&P) medium carbon steel in a 3.5-wt. NaCl solution were investigated by various surface analysis techniques and then compared with those of the Q&P with the same composition.
97 citations
TL;DR: There is a remarkable difference in inhibition efficiency of each inhibitor on the API 5L X60 steel and the commercial inhibitor formulations, and potentiodynamic polarization results reveal a mixed-type inhibition for all inhibitors.
96 citations
TL;DR: In this paper, two benzonitrile derivatives, namely 4-(isopentylamino)-3-nitrobenzonitriles (PANB) and 3-amino-4-isopteenlamino (APAB) have been synthesized and evaluated as corrosion inhibitors for mild steel (MS) in 1'M HCl solution at 303'K by gravimetric, potentiodynamic polarization (PDP) curves, and electrochemical impedance spectroscopy (EIS) methods, as well as Density Functional Theory (DFT) and
91 citations
TL;DR: In this paper, the inhibitory power of three synthesized amino acids based-surfactant molecules, namely, sodium N-dodecyl asparagines (AS), sodium Ndecyl histidine (HS), and sodium Nodecyltryptophan (TS), on the dissolution of carbon steel was inspected in 0.5m NaCl and 05m NaOH solutions at 25°C.
TL;DR: In this article, a facile and simple nanosecond laser texturing treatment was proposed for constructing superhydrophobic surface on carbon steel, which showed desirable multimodal structure.
TL;DR: In this article, the authors investigated the corrosion by Desulfovibrio vulgaris, an example of sulfate reducing bacteria (SRB), and found that it was caused by secreted sulfide rather than by electron harvesting for energy production.
TL;DR: Amorphous coating was successfully fabricated on low carbon steel substrates with one-step laser cladding method using CoCrNiSiBFe high-entropy alloy powder as mentioned in this paper.
TL;DR: In this article, two new sequences of Gemini di-quaternary ammonium salts were synthesized characterized by FTIR and 1HNMR spectroscopic techniques and evaluated as corrosion inhibitor for X-65 steel dissolution in deep oil wells formation water saturated with CO2.
TL;DR: In this article, four bis(coumarin) compounds were prepared and their structures were confirmed using elemental analysis FTIR, 1H NMR and mass spectroscopy, and the results showed that the prepared compounds are efficient and perform their action as mixed type corrosion inhibitors, and their corrosion inhibition tendencies were increased with the rising of their concentration and temperature of measurement.
TL;DR: In this article, the performance of natural aqueous cornflower extract (CFE) to mitigate carbon steel corrosion in harsh saline formation water was investigated and evaluated using weight loss measurements, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques.
15 Feb 2018
TL;DR: The study revealed that the adsorption nature of inhibitor has both phys isorption and chemisorption phenomena and the mixed behavior of the inhibitor NNC along with inhibition efficiency.
Abstract: In the present investigation, the anti corrosive performance of synthesized Naphthalen-2-yl Naphthalene-2-Carboxammide (NNC) in 1 N HCl solution as corrosion inhibitor on carbon steel was studied at room temperature. Potentiodynamic polarization study revealed the mixed behavior of the inhibitor NNC along with inhibition efficiency. The inhibition efficiency of NNC increases with increasing inhibitor concentration. The electrochemical noise analysis (ENA) and electrochemical impedance spectroscopy (EIS) studies have showed that noise resistance (R n ) and charge transfer resistance (R ct ) values were increased with addition of inhibitor concentrations. The synthesized and adsorbed bonds of inhibitor with the metal atom were characterized by ATR-FTIR spectroscopy. The adsorption isotherm explored that the adsorption of NNC obeyed Langmuir adsorption to bond with metal surface at carbon steel/HCl solution interface. The thermodynamic properties were calculated to discuss the adsorption mechanism of corrosion inhibition. Atomic force microscope (AFM) study showed a less corroded and roughness surface morphology, which is due to the formation of protective film layer on the surface. Quantum chemical parameters were calculated and correlated with respect to inhibitive performance of NNC. The study revealed that the adsorption nature of inhibitor has both physisorption and chemisorption phenomena.
TL;DR: In this paper, a tri-linear material model, which can closely represent the stress-strain response of hot-rolled carbon steel, is introduced and incorporated into the continuous strength method.
TL;DR: In this paper, the inhibiting impact of natural aqueous extracts of some plants such as curcumin, parsley and cassia bark extracts for the corrosion of carbon steel (C-steel) in 0.5 M H2SO4 solution was inspected.
Abstract: The inhibiting impact of natural aqueous extracts of some plants such as curcumin, parsley and cassia bark extracts for the corrosion of carbon steel (C-steel) in 0.5 M H2SO4 solution was inspected...
TL;DR: In this article, the early stages of FeCO3 precipitation consists of a complex simultaneous nucleation and growth process and the role of crystal surface coverage and the blocking of actively corroding sites on the steel surface is examined.
TL;DR: In this article, electrochemical impedance data analysis was performed to extract physical parameters of the octadecylamine (ODA) thin film that formed on a P275 carbon steel surface.
TL;DR: In this article, the microbial corrosion impedance of carbon steel in oilfield saline water via quaternary ammonium salt (DDAC) has been estimated utilizing weight loss, electrochemical measurements and surface morphology analysis.
TL;DR: In this article, the influence of the Natronorubrum tibetense on the corrosion of Q235 carbon steel was investigated, and more serious corrosion was observed in the N. tibbenense-inoculated medium than in the sterile medium.
TL;DR: In this paper, the corrosion inhibition and surface protection properties of the combined mixture of Rosmarinus officinalis and zinc oxide on low carbon steel in 1 M HCl and H2SO4 solution was studied by potentiodynamic polarization, open circuit potential measurement, optical microscopy and ATR-FTIR spectroscopy.
Abstract: Electrochemical analysis of the corrosion inhibition and surface protection properties of the combined
admixture of Rosmarinus officinalis and zinc oxide on low carbon steel in 1 M HCl and H2SO4 solution
was studied by potentiodynamic polarization, open circuit potential measurement, optical microscopy
and ATR-FTIR spectroscopy. Results obtained confirmed the compound to be more effective in HCl solution,
with optimal inhibition efficiencies of 93.26% in HCl and 87.7% in H2SO4 acid solutions with mixed
type inhibition behavior in both acids. The compound shifts the corrosion potential values of the steel
cathodically in HCl and anodically in H2SO4 signifying specific corrosion inhibition behavior without
applied potential. Identified functional groups of alcohols, phenols, 1�, 2� amines, amides, carbonyls (general),
esters, saturated aliphatic, carboxylic acids, ethers, aliphatic amines, alkenes, aromatics, alkyl
halides and alkynes within the compound completely adsorbed onto the steel forming a protective covering.
Thermodynamic calculations showed physisorption molecular interaction with the steel’s surface
according to Langmuir and Frumkin adsorption isotherms. Optical microscopy images of the inhibited
and uninhibited steels contrast each other with steel specimens from HCl solution showing a better
morphology
TL;DR: In this paper, the effect of intercritical annealing on the microstructure and mechanical properties of a low carbon steel with the chemical composition (wt%) of 0.12C-1.16Si is studied.
TL;DR: In this paper, ZnO nanorod photoanodes were fabricated by electrodeposition on a conductive indium tin oxide glass substrate, enabling photoelectrochemical cathodic protection of both stainless and carbon steels in a chloride solution.
TL;DR: The new synthesized cationic Gemini surfactant (CGS) was tested as a corrosion inhibitor for carbon steel (CS) in 1.0m hydrochloric acid using weight loss, electrochemical spectroscopy and potenti...
Abstract: The new synthesized cationic Gemini surfactant (CGS) was tested as a corrosion inhibitor for carbon steel (CS) in 1.0 M hydrochloric acid using weight loss, electrochemical spectroscopy and potenti...
TL;DR: In this article, the corrosion protection performance of polypyrrole (PPY)-MoO 4 2− coated steel in 0.1 mM HCl solution was investigated by electrochemical impedance spectroscopy and Tafel polarization.
TL;DR: In this paper, recovery shrimp waste protein (RSWP) was extracted, characterized and tested their inhibition effects as a corrosion inhibitor for carbon steel in 1 1/M HCl solution using different electrochemical techniques.