Corrosion inhibition performance of threonine‐modified polyaspartic acid for carbon steel in simulated cooling water

Chen, Jianxin; Cai, Wei; Han, Jian; Hu, Baisong; Wang, Chongbin; Zhong, Yunlong; Xu, Hao

doi:10.1002/app.47242

Cited by 16 publications

(12 citation statements)

References 67 publications

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“…where C is the concentration of NCs and K ads is the adsorption equilibrium constant. Longmuir adsorption isotherm plots of C/θ vs C straight lines 60,66 as shown in Figure 9, with a linear correlation coefficient (R 2 ) equal to 0.97 and 0.99 for PPySMF‐1 and PPySMF‐5 respectively and a slope are very close to 1. This indicates that the adsorption of PPy–SMF NCs on 316 L SS surface obeys the Langmuir adsorption isotherm 67 …”

Section: Resultsmentioning

confidence: 87%

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Packiaraj

Kumar

2020

J of Applied Polymer Sci

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In this work, new water-soluble polypyrrole-sulfonated melamine formaldehyde nanocomposites (PPy-SMF NCs) were first synthesized by one-step insitu polymerization of pyrrole with FeCl 3 in the presence of various mole ratios of sulfonated melamine formaldehyde (SMF). The characterization of the PPy-SMF NCs was investigated via ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray, dynamic light scattering, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, and conductivity measurements. The resulting PPy-SMF NCs were proved to improve the solubility, electrical properties, and thermal stability. The anticorrosion performance of PPy-SMF NCs on 316 L stainless steel (316 L SS) was examined using electrochemical impedance spectroscopy, potentiodynamic polarization, and weight-loss method. The result showed that the PPy-SMF NCs acts as a mixed-type inhibitor, as well as a protective layer to 316 L SS against corrosion in 3.5% NaCl solution. The Langmuir adsorption isotherm was well fitted and suitable to explain the adsorption behavior of the PPy-SMF NCs on 316 L SS surface. The inhibition efficiency of PPy-SMF NCs is 99% by the weight-loss method which could be attributed to the protective layer formed on 316 L SS surface by the adsorption of PPy-SMF NCs.

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Section: Resultsmentioning

confidence: 87%

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Packiaraj

Kumar

2020

J of Applied Polymer Sci

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“…Among most typical models, the Langmuir adsorption isotherm, based on the coverage data ( θ ) from polarization tests, achieved a satisfactory level of fitting with a correlation coefficient of 0.999 (Figure 10), which can be represented by the following formulae: θ=IE1100 (θ1−θ)=Kadsc where c is the concentration of SCDP/CA assembly, mg/L; and K ads is the adsorption equilibrium constant. The straight fitted line with the slope close to unity indicates the adsorption of guest molecules on the steel surface is a monolayer in nature [47].…”

Section: Resultsmentioning

confidence: 99%

Molecular Assembly between Weak Crosslinking Cyclodextrin Polymer and trans-Cinnamaldehyde for Corrosion Inhibition towards Mild Steel in 3.5% NaCl Solution: Experimental and Theoretical Studies

Fan

Zhou

et al. 2019

Polymers

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Constructing molecular assembly between a soluble cyclodextrin polymer (SCDP) and an anticorrosive component is conducive to increasing the availability of a corrosion inhibitor with low molecular polarity in aqueous solution. The SCDP was prepared via the weak crosslinking effect of glutaraldehyde using β-cyclodextrin as the subunit, whose structure was confirmed by proton nuclear magnetic resonance spectra (1H NMR), X-ray diffraction and morphology. An assembly between SCDP (host) and trans-cinnamaldehyde (guest, CA) was constructed, and the intermolecular interactions were disclosed by Fourier transform infrared spectra (FTIR). The corrosion inhibition of SCDP/CA assembly for mild steel in 3.5% NaCl solution was assessed through electrochemical and surface analyses. 1H NMR results showed that exterior hydroxyls of β-cyclodextrin were the active sites for crosslinking. Hydrogen bonds might be the binding force between SCDP and CA according to FTIR analyses. Electrochemical measurements revealed that SCDP/CA assembly could suppress both cathodic and anodic reactions and enhance the polarization impedance for mild steel in the corrosive medium with a maximum efficiency of 92.2% at 30 °C. Surface analyses showed that CA molecules could be released from the assembly followed by the energy competition mechanism, and solely adsorb on the steel surface in parallel form, which was further evidenced by theoretical modeling.

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“…The coefficients σ k3 and σ ω3 are calculated by a linear combination of the respective coefficients according to the following Equations (8) and (9).…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…The methods of non-destructive testing solutions for monitoring and inspection of pipelines and pressure vessels to the oil and gas industry were discussed by Shameli [8]. New scientific work on green polymers and corrosion inhibitors were analyzed by Chen [9]. It is gradually used in industrial processes to protect carbon steel against corrosion in the solution environment.…”

Section: Introductionmentioning

confidence: 99%

Numerical Calculation of Oil Dispersion through the Air Flow Applied to the Inner Surface of Slim Tubes

et al. 2019

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One simple, efficient, reliable, and inexpensive method to protect the inner surface of slim tubes prior to exposure to corrosion is to apply a dispersed oil fraction through a nozzle and a mixing valve to prepare a mixture of air and oil applied on the texture in a suitable form. The problem, in particular, is in transporting the oil micro particles to the distal end of the lean tube. The method also has an ecological effect, since other known “soaking” methods of oil application onto the inner surface of slim tubes require long and laborious cleaning methods with higher oil consumption. This method was experimentally verified by measurement and modal simulation in Ansys CFX 19.1 software. The results indicate the possibilities of using the method in practice. However, there are a few rules and recommendations to follow when applying this solution strategy.

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Corrosion inhibition performance of threonine‐modified polyaspartic acid for carbon steel in simulated cooling water

Cited by 16 publications

References 67 publications

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Molecular Assembly between Weak Crosslinking Cyclodextrin Polymer and trans-Cinnamaldehyde for Corrosion Inhibition towards Mild Steel in 3.5% NaCl Solution: Experimental and Theoretical Studies

Numerical Calculation of Oil Dispersion through the Air Flow Applied to the Inner Surface of Slim Tubes

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