Corrosion Inhibition Research Articles

Developing a novel copper nano-based emulsified cutting fluid with antimicrobial and anticorrosion properties – an attempt for sustainability

Purpose This study aims to develop a copper nano-based emulsified cutting fluid (ECF) with enhanced thermal, antimicrobial and anti-corrosion properties. The study focuses on optimizing the water-to-Triton X-100 (W/TX) ratios and incorporating copper nanoparticles to improve the fluid’s overall efficacy in machining applications. Design/methodology/approach Various trial combinations were conducted to determine the optimal W/TX ratios. The as-prepared copper nanoparticles were dispersed in the cutting fluid to enhance its thermo-physical properties. The thermal conductivity, thermal stability and surface spreading capability were measured. Microbial studies identified prevalent microorganisms, particularly Mycobacterium immunogenum. To combat microbial contamination and corrosion, natural biocides (ß-Ionine) and sodium dihydrogen phosphate (NaH2PO4) were added. The corrosion inhibitor efficiency and overall performance were evaluated. Findings The inclusion of copper nanoparticles significantly improved the cutting fluid thermal properties, achieving a 51.12% enhancement in thermal conductivity and thermal stability. The surface spreading capability was enhanced with a contact angle of 52.48°. Mycobacterium immunogenum was identified as the most frequent contaminant. The addition of natural biocide ß-Ionine effectively addressed microbial contamination, while 1.4 ml of NaH2PO4 improved the corrosion inhibitor efficiency to 66.94%. The Cu-W/TX cutting fluid demonstrated eco-friendly characteristics with notable antimicrobial and anti-corrosion benefits. Originality/value The research work improves ECFs by incorporating copper nanoparticles and optimizing surfactant ratios. It highlights Triton X-100’s potential as a cutting fluid base and the benefits of natural biocides, contributing to more sustainable, efficient fluids with significant environmental and industrial implications.

Density functional theory and molecular dynamics analysis of oxadiazole derivatives as corrosion inhibitors in hydrochloric acid media (HCl)

Density functional theory and molecular dynamics analysis of oxadiazole derivatives as corrosion inhibitors in hydrochloric acid media (HCl)

Influence of calcium sources on the bio-mineralization behavior of Shewanella putrefaciens and induced microbiologically influenced corrosion inhibition.

The influence of different calcium sources on the mineralization behavior of Shewanella putrefaciens and their roles in microbiologically influenced corrosion inhibition (MICI) of Q235 carbon steel were investigated. Calcium lactate, calcium nitrate, and calcium L-aspartate were selected as alternative calcium sources to assess their effects on bacterial growth, carbonate deposition, and corrosion resistance. S. putrefaciens exhibited stable growth in all tested media, with the pH exceeding 8 after 14 days, promoting carbonate precipitation. Under sterile conditions, all calcium sources provided some corrosion inhibition, with calcium L-aspartate demonstrating the most effective protection. In bacterial inoculated systems, calcium lactate and calcium L-aspartate facilitated the formation of a continuous CaCO3 mineralized layer, significantly reducing corrosion, whereas calcium nitrate resulted in discontinuous carbonate deposits, promoting localized corrosion. Electrochemical impedance spectroscopy and potentiodynamic polarization analyses confirmed that the mineralized layers formed with calcium lactate and calcium L-aspartate significantly enhanced corrosion resistance, while calcium nitrate exacerbated corrosion due to nitrate-reducing bacterial activity. These findings emphasize the crucial role of calcium source selection in MICI and provide insights for optimizing microbial mineralization strategies for corrosion mitigation.

Corrosion Inhibitor of API Pipeline Steels: A Review

Corrosion Inhibitor of API Pipeline Steels: A Review

Formulation of In Situ Synthesized TiO2–Jatropha Oil Bio-Nanolubricants—A Green Alternative for Petroleum-Based Lubricant

Abstract Effective lubrication is one of the most vital aspects for desirable productivity in mechanical systems. This can be achieved through reduced friction and wear between mating components by proper lubrication. But the hazardous impact of these chemical lubricants such as petroleum-based oils on our environment cannot be disregarded. So, the consistent quest for a better alternative to these emission-causing lubricants has opened a great avenue for the practice of applying biodiesel like Jatropha oil as a lubricant. The application of nanolubricants has been reported to exhibit better tribological performances than base oils. In the present work, nano-TiO2 particles were synthesized in situ followed by standard characterization techniques. Nano-oil samples were formulated by mixing nanoparticles (NPs) in Jatropha oil at different proportions (v/v). The stability of these dispersants was evaluated by standard methods. The nano-oil samples showed better stability, and there was no appreciable improvement in flashpoints; however, they showed significant enhancement in terms of fire points. The friction coefficient obtained from the four-ball test revealed that the addition of TiO2 NPss improved the antifriction behavior in comparison to pure Jatropha oil (a maximum of 37.91% reduction in frictional force). Results from the test showed that the limiting pressure of seizure was improved by 43.81% compared to base oil. Environmental viability and degradation studies have also been conducted to ascertain the applicability of this TiO2–Jatropha oil as a green fuel alternative. The corrosion inhibition capacity of the nanofluid was found to be greater than plain emulsion. The cost–benefit analysis at the end also suggests that in situ synthesis of TiO2 nanodispersant is economically viable. (The lubricating efficiency of sustainably resourced Jatropha biolubricant was improved multifold by supplementing it with TiO2 nanoparticles. After careful evaluation, it was observed that the nano-oil samples are biocompatible and hazardous emissions from this lubricant were low. The wear and friction inhibitory capabilities as well as the stability of this biolubricant were also enhanced. The effect of nanoparticles on the corrosion of machine parts was also studied, which is rarely focused by researchers.)

Assessment of Sustainable Ethanolamine-Based Protic Ionic Liquids with Varied Carboxylic Acid Chains as Corrosion Inhibitors for Carbon Steel in Saline Environments

The inhibitory performance of three distinct protic ionic liquids (PILs), namely, 2-hydroxyethyl ammonium formate (PIL 01), 2-hydroxyethyl ammonium propionate (PIL 02), and 2-hydroxyethyl ammonium pentanoate (PIL 03), was evaluated to determine their suitability as eco-friendly corrosion inhibitors for carbon steel (ASTM A36) in a 3.5 wt. % NaCl aerated neutral electrolyte solution. Standard corrosion inhibitor assessment methods, including electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), weight loss measurements, and microscopic techniques (SEM and optical microscopy), were employed to examine the steel surface and corrosion rate. There is a general agreement that the inhibition efficacy is directly associated with the adsorption capacity of substances on the surface of an investigated material, normally stainless or carbon steel. The standard free energies of adsorption were approximately −22 kJ mol−1, indicating a physical adsorption type of interaction between ionic liquids and the electrode surface. The adsorption behavior of protic ionic liquids on an A36 steel surface conforms to a Langmuir-type isotherm. In conclusion, PIL 01 demonstrated an inhibition efficiency exceeding 80%, while PILs 02 and 03 exhibited efficacies in the 50–60% range. The inhibition efficiency was observed to be proportional to the inhibitor’s concentration. These results suggest that PIL 01, PIL 02, and PIL 03 exhibit significant corrosion inhibition properties.

Synthesis of the vanillin-modified lauryl imidazoline derivative and its corrosion inhibition properties

The objective of the present study was to investigate the corrosion inhibition effect of two novel imidazoline-derived compounds, namely 2-(2-undecyl-4,5-dihydro-1H-imidazol-1-yl)ethan-1-amine (LI) and (Z)-2-methoxy-5-(((2-(2-undecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)imino)methyl) phenol (VLI) in 3.5 wt.% NaCl solution. The molecular structures of the two compounds were characterized by 1H-NMR and FT-IR spectroscopy. The corrosion behavior of the two compounds on Q235 carbon steel in 3.5 wt.% NaCl solution and the mechanism of action were systematically investigated using electrochemical techniques, surface analysis methods, and quantum chemical calculations. The results showed that the corrosion inhibition efficiencies of LI and VLI reached 92.75% and 90.1%, respectively, with LI as anodic and VLI as mixed corrosion inhibitors. Theoretical calculations confirmed that the two corrosion inhibitors were adsorbed on the metal surface by physicochemical means.VLI demonstrated superior corrosion inhibition performance compared to LI, which was attributed to its higher adsorption sites, effectively enhancing its adsorption capacity.

Amide-Linked Alkylpyridinium Gemini Surfactants for Corrosion Mitigation of Low-Carbon Steel.

The anticorrosion properties of three amide-linked alkylpyridinium gemini surfactants (ALAPGS), viz., 3,3'-(propanediamide)bis(1-n-dodecylpyridinium) dibromide (ALDPGS), 3,3'-(propanediamide)bis(1-n-tetradecylpyridinium) dibromide (ALTPGS), and 3,3'-(propanediamide)bis(1-n-octadecylpyridinium) dibromide (ALOPGS), were studied on low-carbon steel in 3.5% NaCl through weight loss, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) methods. The anticorrosive efficiency of ALAPGS on low-carbon steel was contingent upon the concentration and length of the alkyl tails. In addition, the corrosion inhibition efficiency was found to be the highest when the concentration of the gemini reaches close to the critical micelle concentration (cmc) and followed the order ALOPGS > ALTPGS > ALDPGS. The results obtained from EIS agreed with the findings of PDP and weight loss experiments. The PDP studies indicated that the studied gemini acts as a mixed-type inhibitor. Furthermore, the morphology of low-carbon steel was studied through scanning electron microscopy and atomic force microscopy. Molecular dynamics simulations were conducted to understand the interaction between ALAPGS and low-carbon steel. The results suggested that ALAPGS are effective corrosion inhibitors for low-carbon steel.

MgAl Layered Double Hydroxide Nanoplate Coatings as Corrosion Inhibitors for Long-Term Protection of Q235 Steel

MgAl Layered Double Hydroxide Nanoplate Coatings as Corrosion Inhibitors for Long-Term Protection of Q235 Steel

Towards a Deeper Understanding of the Mechanism of Daphne Gnidium Leaf Extract on Mild Steel Corrosion Inhibition: Experimental Investigation, UHPLC View, and Theoretical Computations

Towards a Deeper Understanding of the Mechanism of Daphne Gnidium Leaf Extract on Mild Steel Corrosion Inhibition: Experimental Investigation, UHPLC View, and Theoretical Computations

Achieving colloidal stability of diluted MXene dispersions through corrosion inhibition strategy with sodium tartrate

Achieving colloidal stability of diluted MXene dispersions through corrosion inhibition strategy with sodium tartrate

Research on the steel corrosion inhibition of green tea leaf extract in a simulated sea water environment

In this paper, the effect of polyphenol compounds extracted from green tea leaves to inhibit CT3 steel corrosion in a simulated sea water environment was studied. The corrosion inhibitor is evaluated through some specifications: electrochemical corrossion and salt spray corrosion test by the B117-16 standard. A scanning electron microscope (SEM) and the salt-sprayed steel plate surface observation were used to evaluate the level of corrosion. The CT3 steel soaked in polyphenol solutions with various concentrations and times showed different corrosion resistance in marine conditions. At the polyphenol concentration of 1.5 mg in 1 liter solution, the corrosion rate of CT3 steel is reduced from 0.057 mm/year compared to 0.113 mm/year in the 3.5% NaCl solution without polyphenol, and soaking CT3 steel for 45 minutes in polyphenol : water : ethanol solution (1 g : 90 ml : 910 ml) gives the best resistance to salt spray corrosion.

Harnessing the Potential of Amide-Linked Gemini Surfactants for Corrosion Inhibition and Antimicrobial Activity: From Molecular Design to Functional Performance.

Gemini surfactants, also called Gemini, especially those with quaternary ammonium head groups, are recognized for their distinctive aggregation behavior and enhanced structure-activity relationships. The unique dual-head and dual-tail structure of Gemini grants them superior surface activity, allowing them to effectively lower surface and interfacial tension. To investigate the self-assembly behavior and surface-active properties that make them suitable as anticorrosion and antimicrobial agents, a series of cationic Gemini featuring amide bonds and varying alkyl chain lengths were synthesized. Surface activity and self-assembly characteristics of these cationic Gemini were analyzed using methods such as surface tension, electrical conductivity, fluorescence, and isothermal titration calorimetry. The findings revealed that these Gemini possess enhanced surface-active and self-assembly properties in comparison to traditional single-tail, monoheaded surfactants. Thermodynamic studies confirmed that these Gemini self-assemble spontaneously in water above a relatively low threshold concentration, with the self-assembly process becoming less favorable as the alkyl chain length decreased. The length of the chains also affected the size and shape of the aggregates formed. These Gemini have been shown to exhibit remarkable anticorrosion properties on steel surface. The performance of these compounds as corrosion inhibitors showed a clear dependence on chain length, with the shortest chain length Gemini providing the highest inhibition efficiency. These Gemini have also exhibited pronounced antibacterial activities against Escherichia coli (DH5alpha) and Staphylococcus aureus bacteria.

DFT and Monte Carlo Analysis of the Anti-corrosion Behavior of a Series of the Purine Derivatives.

Corrosion poses significant challenges in both industrial applications and everyday life, necessitating effective corrosion control strategies to mitigate costs and enhance safety. This research investigates the anti-corrosion potentials of purine derivatives-hypoxanthine (1), xanthine (2), theophylline (3), theobromine (4), uric acid (5), and isoguanine (6)-using density functional theory (DFT) and Monte Carlo simulations. Electronic properties, including energy gaps, HOMO and LUMO energies, molecular electrostatic potential (MEP) surfaces, and global reactivity descriptors, were computed at the B3LYP/6-311 + + G(d, p) theoretical level. Monte Carlo simulations were employed to evaluate the adsorption efficacy of these compounds on Fe(110) and Cu(111) surfaces. The findings reveal significant electron charge transfer from the molecules to the metal surfaces, with uric acid (5) and isoguanine (6) exhibiting the highest inhibition efficiencies. Adsorption energy calculations indicate that compounds 3 and 4 exhibit lower adsorption energies on Fe(110), while adsorption on Cu(111) surfaces demonstrated approximately 1.5 times lower absolute values. These results highlight the potential of purine derivatives, particularly compounds 5 and 6, as effective corrosion inhibitors for metal surfaces.

Boron oxide and magnesium oxide as an additıve vanadic corrosion inhibitor for heavy fuel oil

Boron oxide and magnesium oxide as an additıve vanadic corrosion inhibitor for heavy fuel oil

Corrosion Inhibition of Aluminium in Water-in-Diesel Emulsion Using Ethanol Extract of Chrysophyllum albidum Leaves

Corrosion Inhibition of Aluminium in Water-in-Diesel Emulsion Using Ethanol Extract of Chrysophyllum albidum Leaves

Corrosion inhibition of bis-isoQuinolinium salts derivatives for mild steel A283 Grade C in sulfuric media: an experimental and theoretical investigation

This work examines the efficiency of four bis-isoQuinolinium compounds in preventing the corrosion of A283 Grade C steel in a 0.5 M H2SO4 solution. The performance of these corrosion inhibitors was examined at various concentrations using weight loss, electrochemical impedance spectroscopy, and potentiodynamic polarization. Using gravimetric weight loss, the efficiency (IE%) reached a high value of 97.32, 98.14, 97.94, and 98.14% when the concentration reached 5 mM of bis-isoQuinolinium salts EtiQuiBr, PriQuiBr, BuiQuiBr, and PniQuiBr, respectively. According to the different investigations, the bis-isoQuinolinium salts are mixed-type inhibitors with slight predominance of cathodic inhibition. The adsorption of all studied inhibitors on the metal surface of A283 Grade C mild steel followed the Langmuir adsorption isotherm and the inhibition efficiencies decreased with temperature. The thermodynamic parameters, such as Ea, Kads, and ΔG°ads were determined. The negative values of ΔG°ads suggested a favorable adsorption of all inhibitors on steel surface. The order of IE determined from experimental measurements is: EtiQuiBr < PriQuiBr < BuiQuiBr < PniQuiBr. Furthermore, microscopic surface analyses, such as SEM and AFM were used to characterize the surface morphology of the steel specimens. Moreover, the Density Functional Theory (DFT) calculations were performed to correlate the electronic molecular structure of the studied inhibitors with their inhibition efficiency. The tested compounds can be effectively used as corrosion inhibitors for steel in sulfuric acid and the findings of this work shed more light on the corrosion inhibition of steel by ammonium salts in acidic medium.

Cinnamon leaf extract as an effective inhibitor for mild steel corrosion in pickling bath environments

Inhibition effect of acidic extracts of cinnamon leaves for mild steel corrosion in HCl solutions of different concentrations was investigated using mass loss measurements, electrochemical impedance spectroscopic (EIS) analysis and potentiodynamic polarization studies at ambient temperature. According to mass loss measurements, 60 g L−1 extract shows excellent inhibition efficiency up to 90% after 24 h immersion in all acid concentrations tested. The polarization resistance of mild steel specimens obtained by EIS measurements is found to be increased and the current density obtained by potentiodynamic polarization studies is decreased significantly in the presence of the extract. Moreover, significant increase in the charge transfer resistance of mild steel specimens by more than a factor of 10 in the presence of the inhibitor is achieved at lower HCl concentrations of 0.1 mol L−1 and 0.5 mol L−1. These studies suggest that the inhibition effect observed is due to the adsorption of corrosion-resistive components of the cinnamon leaf extract on the mild steel surface, which follows the Langmuir adsorption isotherm.

Unlocking superior corrosion inhibition in HCl: thiol-functionalized purine derivatives outperform amino analogues via synergistic electrochemical and quantum mechanisms

Unlocking superior corrosion inhibition in HCl: thiol-functionalized purine derivatives outperform amino analogues via synergistic electrochemical and quantum mechanisms

Crystal Structures and Corrosion Inhibitions of Three Cobalt Complexes of Terephthalate Anion and Bis‐Nitrogen Donor Ligands

ABSTRACTThree Co(II) complexes of terephthalate anion containing 1,10‐phenanthroline (phen) or 2,2′‐bipyridine (2,2′‐bipy), are prepared. The structures of dimeric [Co2(H2O)4(μ‐H2O)2(phen)2]4+·2(C8H4O42−), 1, and the polymeric [Co2(H2O)2(phen)2(μ‐C8H4O4)2]n, 2, complexes were confirmed by single crystal structure determination. Both complexes have CoN2O4 core in a distorted octahedral arrangement. Extensive hydrogen bonding and π–π stacking interactions consolidate 3‐D structures in 1 and 2. Complex 3, [Co(μ‐C8H4O4)(2,2′‐bipy)]n, was previously reported. It has CoN2O4 core in a distorted trigonal prismatic environment. Complexes 1, 2 and 3 exhibited good inhibition efficiencies for corrosion of carbon steel in 0.25‐M sulfuric acid solution. The order of corrosion inhibiting effect of the complexes was 2 (94.6%) &gt; 1 (90.5%) &gt; 3 (79.5%). The increase in Rp value and the decrease in Cdl were in parallel with the increase in the concentration of complexes. Tafel plot indicated that complex 1 behaved as a cathodic‐type corrosion inhibitor, whereas complexes 2 and 3 as anodic inhibitors for C‐steel in sulfuric acid medium. Weight loss measurement of steel samples in 1‐M HCl showed more inhibition of corrosion by complexes 1 and 2 than by complex 3. The adsorption mechanism of inhibitors on C‐steel followed Langmuir isotherm. The free energy changes indicated comprehensive physical and chemical adsorption for the three complexes on the surface of the C‐steel. SEM analysis of steel samples in 1‐M HCl proved the efficiency of complexes in retarding corrosion as the steel surface showed smoothness compared to the blank. Quantum chemical DFT study declared that the highest corrosion inhibition efficiency is observed for complex 2, which was strongly supported by the electrochemical anticorrosion studies. The results of the TGA analysis support the X‐ray crystal structures of the complexes.