2-Amino-4-(4-methoxyphenyl)-thiazole as a novel corrosion inhibitor for mild steel in acidic medium

Gong, Weinan; Yin, Xingtian; Liu, Ying; Chen, Yun; Yang, Wenzhong

doi:10.1016/j.porgcoat.2018.10.001

Cited by 72 publications

(26 citation statements)

References 61 publications

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“…It should also be noted from Figure 2 that the anodic current densities measured at high anodic polarization in the presence of low concentrations of PyODT present greater values than those achieved in the blank electrolyte. A similar phenomenon was formerly reported for mild steel [ 38 ] and Q235 steel [ 2 ] corrosion and explained by the inhibitor desorption at large anodic polarization, which leads to a decrease of the surface coverage and an enhancement of the anodic dissolution reaction [ 38 ].…”

Section: Resultssupporting

confidence: 80%

Combined Electrochemical, Raman Analysis and Machine Learning Assessments of the Inhibitive Properties of an 1,3,4-Oxadiazole-2-Thiol Derivative against Carbon Steel Corrosion in HCl Solution

et al. 2022

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The inhibiting properties of 5-(4-pyridyl)-1,3,4-oxadiazole-2-thiol (PyODT) on the corrosion of carbon steel in 1.0 M HCl solution were investigated by potentiodynamic polarization, electrochemical impedance spectroscopy, Raman spectroscopy, and SEM-EDX analysis. An approach based on machine learning algorithms and Raman data was also applied to follow the carbon steel degradation in different experimental conditions. The electrochemical measurements revealed that PyODT behaves as a mixed-type corrosion inhibitor, reaching an efficiency of about 93.1% at a concentration of 5 mM, after 1 h exposure to 1.0 M HCl solution. Due to the molecular adsorption and structural organization of PyODT molecules on the C-steel surface, higher inhibitive effectiveness of about 97% was obtained at 24 h immersion. The surface analysis showed a significantly reduced degradation state of the carbon steel surface in the presence of PyODT due to the inhibitor adsorption revealed by Raman spectroscopy and the presence of N and S atoms in the EDX spectra. The combination of Raman spectroscopy and machine learning algorithms was proved to be a facile and reliable tool for an incipient identification of the corrosion sites on a metallic surface exposed to corrosive environments.

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Section: Resultssupporting

confidence: 80%

Combined Electrochemical, Raman Analysis and Machine Learning Assessments of the Inhibitive Properties of an 1,3,4-Oxadiazole-2-Thiol Derivative against Carbon Steel Corrosion in HCl Solution

et al. 2022

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“…The decrease in C dl with increasing the inhibitor concentration was due to the increase in thickness or decrease in the dielectric constant of the adsorption film. This confirmed the adsorption of CGSES12, CGSES14 and CGSES16 molecules on the MS surface, instead of water molecules [45,46]. The electrochemical data are summarized in Table 5.…”

Section: Eis Resultssupporting

confidence: 63%

Adsorption and Corrosion Performance of New Cationic Gemini Surfactants Derivatives of Fatty Amido Ethyl Aminium Chloride with Ester Spacer for Mild Steel in Acidic Solutions

2020

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Three new cationic gemini surfactants with ester spacer type 2-2′-(ethane-1,2-diyl bis(oxy)) bis(N-(2-alkanamidoethyl)-N,N-dimethyl-2-oxoethan-1-aminium)) dichloride) (CGSES12, CGSES14 and CGSES16), based on N,N-dimethyl fatty amido ethylamine, were produced. These gemini quaternary ammonium salts were synthesized using a three-step reaction method, starting from th/e condensation of the fatty acid chloride (RCOCl) of various hydrophobic chain lengths (R, C11H23, C13H27, C15H31) with N,N-dimethyl ethylene diamine, followed by the quaternization of the tertiary amino group formed with the spacer of the ester group formed in the second step. The chemical configuration of the surfactants was established by FT-IR, 1HNMR, 13CNMR and Mass spectroscopies. The inhibition performance of three surfactants was studied by weight loss and electrochemical measurements. The results show that CGSES12, CGSES14 and CGSES16 behave as effective inhibitors and surface agents. The maximum efficiency was higher than 94% at 2.5 mM, and the inhibition order was CGSES16 > CGSES14 > CGSES12. This was due to the increment in hydrophobicity of the gemini surfactants. Their adsorption on a mild steel surface followed the Langmuir isotherm. CGSES12, CGSES14 and CGSES16 can be considered mixed-type inhibitors. The presence of CGSES12, CGSES14 and CGSES16 increased charge transfer resistance and decreased the corrosion rate. The adsorption focused on heteroatoms and the surface properties of cationic gemini surfactants.

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“…The impedance plots for the inhibited solutions are identical, indicating that the inhibitor reduces metal corrosion without altering the mechanism of corrosion [27].The parameters from electrochemical impedance such as polarization resistance (Rp), heterogeneity (n), constant phase element (CPE) and solution resistance (Rs) were calculated by fitting the impedance spectra to the corresponding equivalent circuit model shown in figure 2 and are presented in Table 1. The inhibition efficiency, Ei% of Pyr-3, Pyr-7 and Pyr-9 for the iron electrode can be calculated from the polarization resistance, Rp as follow: [28]…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Studies on the Effect of Some Pyrimidine Derivatives on the Corrosion of Iron in 1M Hydrochloric Acid

et al. 2021

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The effect of three pyrimidine derivatives namely, 6-amino-3,4-dihydropryimidin-2(1H)-thione (Pyr-3) , ethyl (R)-2mercapto-4-methyl-6-phenyl-1,6-dihydropyrimidine-5-carboxylate (Pyr-7) and ethyl (R)-6-(4-chlorophenyl)-2-mercapto-4methyl-1,6-dihydropyrimidine-5-carboxylate (Pyr-9) on the corrosion of iron in 1.0 M HCl in absence and presence of various concentrations ranging from 10 -3 to 10 -7 M has been studied. Both electrochemical (potentiodynamic, electrochemical impedance spectroscopy and electrochemical frequency modulation) and computational studies (quantum chemical calculations and molecular dynamic simulations) have been used in this study. Electrochemical investigations show the effectiveness of the studied pyrimidine derivatives as corrosion inhibitors. The best inhibition efficiency reached 96% for Pyr-9 at 10 -3 M. The studied pyrimidine derivatives were of mixed type inhibitor. Equivalent circuit for the studied system was determined. The studied pyrimidine derivatives follow Langumir adsorption isotherm. Computational study confirms the experimental investigation.

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2-Amino-4-(4-methoxyphenyl)-thiazole as a novel corrosion inhibitor for mild steel in acidic medium

Cited by 72 publications

References 61 publications

Combined Electrochemical, Raman Analysis and Machine Learning Assessments of the Inhibitive Properties of an 1,3,4-Oxadiazole-2-Thiol Derivative against Carbon Steel Corrosion in HCl Solution

Combined Electrochemical, Raman Analysis and Machine Learning Assessments of the Inhibitive Properties of an 1,3,4-Oxadiazole-2-Thiol Derivative against Carbon Steel Corrosion in HCl Solution

Adsorption and Corrosion Performance of New Cationic Gemini Surfactants Derivatives of Fatty Amido Ethyl Aminium Chloride with Ester Spacer for Mild Steel in Acidic Solutions

Studies on the Effect of Some Pyrimidine Derivatives on the Corrosion of Iron in 1M Hydrochloric Acid

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