Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies

Liu, Xia; Okafor, Peter C.; Pan, Xuemei; Njoku, Demian I.; Uwakwe, Kelechi J.; Zheng, Yuan

doi:10.1080/01694243.2020.1749474

Cited by 24 publications

(5 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, greater values of E ads were obtained in the gas phase than in the aqueous phase, which is line with previous work . The observed -ve sign before the E ads indicates the spontaneous adsorption of Co-MOF with a parallel disposition on the Fe surface …”

Section: Resultssupporting

confidence: 91%

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

et al. 2023

View full text Add to dashboard Cite

Co-MOF based metal organic framework was synthesized by reacting a metal ion (cobalt nitrate hexahydrate) with an organic ligand (2-methylimidazole) via a wet chemical method. The resulting material was characterized using detailed analytical methods and further was used as a self-assembly corrosion inhibitor in sweet corrosive environment. The empirical data set via electrochemical studies was modeled using adaptive neuro fuzzy inference system (ANFIS). The observed results showed that Co-MOF could significantly impede the corrosion rate of X65 steel and protect it from CO 2 corrosion. Increasing the concentration of Co-MOF in the test solution increased the inhibition efficiency up to 97% at 0.1 wt % Co-MOF with a mixed-type inhibition mechanism. In addition, the DFT/MD-simulation approach evidenced the adsorption disposition of Co-MOF in aqueous and gas phase which complement with the empirical findings. Also, the prognostic capability of the proposed algorithm based on the statistical parameters such as root-mean-square error (RMSE), chi square (χ 2 ), model predictive error (MPE) and coefficient of determination (R 2 ) were appraised. From the viewpoint of statistics, the explanatory model aligned credibly with the ANFIS algorithm. The overall findings confirmed a dense hybrid coating of the synthesized Co-MOF on X65 steel as responsible for the inhibition of the sweet corrosion.

show abstract

Section: Resultssupporting

confidence: 91%

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

et al. 2023

View full text Add to dashboard Cite

show abstract

“…For the spectra of Trp after steel coupon addition, a blue shift and broadening of the band is observed which may be due to the interconnection of Trp and Fe ions. [ 62 ] Therefore, UV spectra results substantiate the interconnection of Fe ions and the inhibitor molecules, resulting in complexation formation [ 63 ] : Phe–Fe complex and Trp–Fe complex , which mitigated the corrosion of rebar specimens. It is also validated that the inhibitor ions adsorb on the steel substrate through physical and/or chemical processes.…”

Section: Resultsmentioning

confidence: 98%

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Purnima

Goyal

Luxami

2023

Materials & Corrosion

View full text Add to dashboard Cite

Corrosion inhibition mechanism of two aromatic amino acids, phenylalanine (Phe) and tryptophan (Trp), was explored for steel in an alkaline pore solution simulating a carbonated concrete environment. The electrochemical impedance spectroscopy and potentiodynamic polarization test results revealed that both compounds can be used effectively as corrosion inhibitors for carbonated concrete environments with high inhibition efficiency. The dissolution of steel got controlled as Phe and Trp acted as anodic‐type inhibitors. Phe and Trp adsorbed on the steel surface by physiochemisorption process following the Langmuir isotherm. The inhibitive solution analysis through UV–visible technique confirmed the formation of inhibitor–Fe complexes. The surface of steel was analyzed after submergence in corrosive solutions with and without inhibitors by means of optical microscopy, scanning electron microscopy–energy‐dispersive X‐ray spectroscopy, Fourier transformed infrared, and X‐ray photoelectron spectroscopy, which highlights the formation of a compact, barrier layer comprised of metal–inhibitor complex. Subsequently, with the help of the aforementioned techniques, an inhibition mechanism for Phe and Trp was conjectured, which revealed that the presence of additional heterocycle in amino acids can raise the chances of chelation and formation of a more adherent and thermodynamically stable layer. Phe bound with Fe ions through the carboxylate functional group only, while Trp chelated the Fe ions via a nitrogen atom of the pyrrole ring and carboxylate functional group.

show abstract

“…The length of the experiment was 3 days, each X100 pipeline steel sample was weighed and labeled before immersion, and the weight change of each X100 pipeline steel sample was recorded after 72 h. Then, further ultrasonic washing was performed to remove the corrosion reaction material on the surface, and the sample was placed in the oven to dry. The experiment was repeated three times, and the arithmetic mean of the recorded data was determined and used to calculate the sample corrosion rate CR; CR is determined by formula (1) as shown below [6]:…”

Section: Weightlessness Methodsmentioning

confidence: 99%

“…where m0 is the sample quality before corrosion immersion, mi is the sample quality after corrosion immersion, A (cm 2 ) is the acid corrosion contact surface area, and t (h) is the hydrochloric acid immersion time. The corrosion inhibition rate (IEW %) is calculated using the sample corrosion rate and determine by formula (2) as shown below [6]:…”

Section: Weightlessness Methodsmentioning

confidence: 99%

Study on the inhibitory effect of cystine, cysteine and glutamate as inhibitors on X100 pipeline steel in 1 M HCl

Zhang

Sun

et al. 2023

Preprint

View full text Add to dashboard Cite

Metal corrosion can cause massive economic losses and many safety hazards; thus, metal corrosion inhibition has been a major research direction worldwide. Among the many methods to stop metal corrosion, the addition of corrosion inhibitors is a common method. The use of amino acids as metal corrosion inhibitors not only has the advantage of being economical and efficient but also meets the long-term concept of being environmentally friendly. In this study, the effect on the corrosion behavior of a mild steel (X100 pipeline steel) in 1 M HCl containing the same concentration of the amino groups of cystine (Cys-Cys), cysteine (Cys) and glutamate (Glu) was investigated via density functional theory (DFT) and various characterization methods. These methods include the weightlessness method, electrochemical tests, scanning electron microscopy (SEM), and the contact angle test. The results show that the inhibition efficiency increased with increasing inhibitor concentration; Cys-Cys showed the best inhibition and Glu showed the poorest inhibition for X100 pipeline steel at the same amino group concentration. Furthermore, the results obtained from various characterization methods were generally consistent.

show abstract

Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies

Cited by 24 publications

References 65 publications

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Study on the inhibitory effect of cystine, cysteine and glutamate as inhibitors on X100 pipeline steel in 1 M HCl

Contact Info

Product

Resources

About

Corrosion inhibition and adsorption properties of cerium-amino acid complexes on mild steel in acidic media: Experimental and DFT studies

Cited by 24 publications

References 65 publications

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO2 Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO2 Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Study on the inhibitory effect of cystine, cysteine and glutamate as inhibitors on X100 pipeline steel in 1 M HCl

Contact Info

Product

Resources

About

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO₂ Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm