Papaya leaves extract as a novel eco-friendly corrosion inhibitor for Cu in H2SO4 medium

Tan, Bochuan; Xiang, Bin; Zhang, Shengtao; Qiang, Yujie; Xu, Lixin Colin; Chen, Shijin; He, Jiahong

doi:10.1016/j.jcis.2020.08.093

Cited by 296 publications

(86 citation statements)

References 62 publications

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“…These features are assigned in Fig. S2 (B) for 4FPDC as follows: the Ar-H group is located at H (5), H (7), H (9), H (10) which is assigned at peaks with the range δ (ppm), 7.14-7.47; the Ar-NH group is located at H (14) with a peak at δ (ppm), 8.11; the -NH-NH-group is located at H (18), H (20) with peaks at range δ (ppm), 9.38-9.76; the NH 2 group is located at H (23), H (24) with a peak at δ (ppm), 3.35.…”

Section: Characterization Of Inhibitormentioning

confidence: 99%

“…The rest of them though are toxic and environmentally harmful. Global studies have been carried out to find a cheap and an environmentally non-toxic productive corrosion inhibitor [21][22][23][24]. Indeed, a variety of N-heterocyclic compounds have been identified as potential inhibitors, such as thiourea (TU), thioacetamide (TA), thiosemicarbazide (TSC), and dithiohydrazodicarbonamide.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Inhibition Potential of Dithiohydrazodicarbonamide Derivatives for Mild Steel in Acid Media: Synthesis, Experimental, DFT, and Monte Carlo Studies

AlFalah

Kandemi̇rlı

2021

Arab J Sci Eng

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In the present work, new compounds, namely 2-fluoro phenyl-2,5-dithiohydrazodicarbonamide (2FPDC) and 4-fluoro phenyl-2,5-dithiohydrazodicarbonamide (4FPDC), were successfully synthesized and examined as corrosion inhibitors for mild steel in 1 M HCl. The molecular structures were characterized by Fourier transform infrared spectroscopy (FT-IR) and 1 H, 13 C nuclear magnetic resonance (NMR). A scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), and atomic force microscope (AFM) were conducted to identify the surface morphology of mild steel in the absence and existence of a corrosion inhibitor. Several electrochemical techniques have been conducted to evaluate inhibitor efficiency. The influence of immersion time on the efficiency of inhibitors was also investigated. The electrochemical results showed that both compounds appeared to be mixed type. However, 4FPDC is slightly more efficient than 2FPDC (97.3% compared with 96.5% at 1 × 10 −2 M and an immersion time of 5 h). The resistance polarization for inhibitors was found to obey an order of 4FPDC > 2FPDC. The Langmuir isotherm system revealed the best match, and the type of adsorption was physisorption and chemisorption in both compounds. SEM and EDX results have confirmed the presence of particles of inhibitor on the metal surface. A smooth surface was observed in the presence of inhibitors approved by AFM. Quantum chemical results showed that the adsorption of molecules of inhibitor takes place predominantly through protonated structures, and strongly agreed with experimental results. The results reveal that excellent inhibition efficiency was attained even in aggressive conditions, and they can be viewed as novel corrosion inhibitors for mild steel with excellent protection. Keywords Materials and Experimental Methods MaterialsA mild steel rod was purchased from a local market with a chemical composition as follows: (Wt.%): 0.18 C,

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Section: Characterization Of Inhibitormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Potential of Dithiohydrazodicarbonamide Derivatives for Mild Steel in Acid Media: Synthesis, Experimental, DFT, and Monte Carlo Studies

AlFalah

Kandemi̇rlı

2021

Arab J Sci Eng

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“…From PDS analysis, the corresponding Tafel plot is shown in Figure 10 and the Tafel parameters are summarized in Table 3. The corrosion inhibition efficiency for unmodified and modified Cu electrodes in the Tafel plot were calculated using Equation (2) [29,30].…”

Section: Potentiodynamic Polarization Studies (Pds)mentioning

confidence: 99%

3-Mercaptopropanoic Acid-Doped Chitosan/Hybrid-Based Multilayer Sol-Gel Coatings for Cu Protection in 3.5% NaCl Solution

Balaji

2021

Polymers

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In this work, biopolymer based sol-gel was synthesized by doping 3-mercaptopropanoic acid (MPA) with chitosan and a hybrid of 3-glycidoxypropyltrimethoxysilane (GPTMS) and tetraethoxysilane (TEOS). Prepared MPA/hybrid-doped chitosan was applied toa copper (Cu) metal surface by the self-assembly technique to protect the Cu metal from corrosion in a 3.5% NaCl solution. The structure, mechanism and morphology of the modified electrodes were examined using Fourier transform infra-red (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX), and atomic force microscopy (AFM). The decrease in surface roughness for Hy/chitosan/MPA-coated Cu indicates the formation of a dense layer on Cu metal confirmed by AFM. The corrosion protection evaluation of sol-gel coated electrodes was analyzed using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization studies (PDS) in a 3.5% NaCl medium. The MPA/hybrid-doped chitosan sol-gel coated Cu metal showed the greatest resistance to corrosionthanother sol-gel modified electrodes. The MPA-doped-chitosan/Hy sol-gel coating protected the Cu metal by an anodic dissolution process and improved its corrosion protection to 99.9%.

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“…Hence, the increasing demand for safe and sustainable inhibitors has caused researchers to develop environmentally benign corrosion inhibitors. In this regard, the natural extracts of plants and fruits [4][5][6][7], ionic liquids [8,9], drugs [10][11][12] and biopolymers [13,14] have been studied as effective green corrosion inhibitors to prevent the acid corrosion of metal substrates. However, these green corrosion inhibitors are still limited in practical applications owing to the high-cost, time-consuming and tedious synthesis steps or limited shelf life.…”

Section: Introductionmentioning

confidence: 99%

Effective Corrosion Inhibition of Carbon Steel in Hydrochloric Acid by Dopamine-Produced Carbon Dots

Cui

Zheng

2021

Polymers

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In present study, novel nitrogen doped carbon dots (NCDs) are synthesized using a green material—dopamine—as a precursor and studied as corrosion inhibitors for Q235 carbon steel in 1 M HCl solution. According to the electrochemical results, it is found that NCDs acting as a mixed-type corrosion inhibitor can effectively retard the acid corrosion of carbon steel, and their inhibition efficiency increases with the concentration increasing from 50 to 400 ppm. The highest inhibition efficiency is 96.1% in the presence of 400 ppm NCDs at room temperature. Additionally, the adsorption of NCDs obeys the Langmuir adsorption isotherm. In addition, weight loss results show that the inhibition efficiency in the presence of 400 ppm NCDs increases with prolonged exposure time and rising temperature (298–328 K), owing to the strong adsorption of NCDs on the steel surface, and the η value is 92.2% at 60 h of immersion and 86.2%, 89.1%, 90.6% and 92.9% at 298, 308, 318 and 328 K, respectively. Surface analysis by scanning electron microscope (SEM), laser scanning confocal microscope (LSCM) and X-ray photoelectron spectroscopy (XPS) further proves the formation of a protective NCD film on the steel surface.

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Papaya leaves extract as a novel eco-friendly corrosion inhibitor for Cu in H2SO4 medium

Cited by 296 publications

References 62 publications

Corrosion Inhibition Potential of Dithiohydrazodicarbonamide Derivatives for Mild Steel in Acid Media: Synthesis, Experimental, DFT, and Monte Carlo Studies

Corrosion Inhibition Potential of Dithiohydrazodicarbonamide Derivatives for Mild Steel in Acid Media: Synthesis, Experimental, DFT, and Monte Carlo Studies

3-Mercaptopropanoic Acid-Doped Chitosan/Hybrid-Based Multilayer Sol-Gel Coatings for Cu Protection in 3.5% NaCl Solution

Effective Corrosion Inhibition of Carbon Steel in Hydrochloric Acid by Dopamine-Produced Carbon Dots

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