Understanding the corrosion inhibition of carbon steel and copper in sulphuric acid medium by amino acids using electrochemical techniques allied to molecular modelling methods

Mendonça, Glaydson L.F.; Costa, Stefane N.; Freire, V. N.; Casciano, Paulo N.S.; Correia, Adriana N.; Lima‐Neto, Pedro de

doi:10.1016/j.corsci.2016.11.012

Cited by 198 publications

(42 citation statements)

References 54 publications

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“…Therefore, a protective adsorbent layer formed on the surface of the carbon steel, and this layer acted as an effective barrier against aggressive attacked by the acidic solution. However, all the semicircles in the Nyquist plots had nonideal shapes, which was presumably because of the rough and uneven nature of the electrode surface …”

Section: Resultsmentioning

confidence: 99%

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Synthesis of a polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

Shi

Chai

et al. 2018

Polymers for Advanced Techs

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A novel modified polyaspartic acid polymer, polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer (PASP/AEM), was prepared through a ring‐opening reaction of polysuccinimide and 4‐(2‐aminoethyl) morpholine and characterized by 1H NMR. The scale inhibition performance of this copolymer and its ability to disperse Fe2O3 were investigated in static tests. Scanning electron microscopy and X‐ray powder diffraction were used to analyze the effects of PASP/AEM on scale formation. The performance and mechanism of corrosion inhibition by the synthesized copolymer were studied via weight loss measurements and electrochemical measurements. The results showed that PASP/AEM possessed outstanding scale and corrosion inhibition efficiencies and had potential for use as a green scale and pickling inhibitor.

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Section: Resultsmentioning

confidence: 99%

“…However, all the semicircles in the Nyquist plots had nonideal shapes, which was presumably because of the rough and uneven nature of the electrode surface. 36 Figure 9B. Obviously, only one time constant was observed in Bode plots.…”

Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 92%

Synthesis of a polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

Shi

Chai

et al. 2018

Polymers for Advanced Techs

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“…The OCP (Figure 4) increased in the range of 40 and 60 • C, demonstrating that the counterpart sample of mild steel corrosion due to the considerable amounts of protection causing debilitation, and the inhibitor could further expedite the corrosion rate. In other words, a high temperature decreased the effectiveness of the inhibitor [45,46].…”

Section: Open Circuit Potential (Ocp)mentioning

confidence: 99%

Synthesis, Characterization, and Corrosion Inhibition Potential of Novel Thiosemicarbazone on Mild Steel in Sulfuric Acid Environment

et al. 2019

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Corrosion of a material by reaction with a corrosive environment is a common problem across many industries. Iraq is an oil country and corrosion represents a large portion of the total costs for oil producing and a natural potential hazard associated with oil production and transportation. The synthesis of novel thiosemicarbazone, namely 2-(2,4-dimethoxybenzylidene)hydrazinecarbothioamide (DMBHC), was conducted and the chemical structure was elucidated via the 1H and 13C NMR (Nuclear magnetic resonance), and FT-IR (Fourier-transform infrared) spectroscopic spectroscopic techniques in addition to carbon, hydrogen, and nitrogen analyses (CHN analyses). The inhibition properties of the investigated thiosemicarbazone were evaluated for mild steel (MS) corrosion in 1N H2SO4 using electrochemical impedance spectroscopy (EIS), weight loss method, and scanning electron microscopy (SEM). Electrochemical and weight loss techniques revealed that the tested thiosemicarbazone acted as a superior inhibitor for the acidic corrosion of MS and the efficiency increased with increasing concentrations. The EIS results revealed that thiosemicarbazone demonstrated the highest inhibition efficiency of 94.86%, at a concentration of 0.5 mM. Results from the weight loss technique suggested that the thiosemicarbazone acted as a mixed type corrosion inhibitor. The impact of temperature on the mechanism of inhibition of the new synthesized inhibitor of the surface of MS in 1N H2SO4 was investigated at various temperatures (30–60 °C) where the inhibitive efficiency diminished with increasing temperatures. The mechanism of inhibition was additionally verified with the methodological data.

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“…The higher absolute value of the adsorption energy implies the adsorption of the inhibitors is more stable on the metal surface, the inhibition effect is better and these inhibitor molecules have the stronger synergy. Adsorption energy (Eadsoption) is calculated as follows [43,44]:…”

Section: Scanning Electron Microscopy Characterizationmentioning

confidence: 99%

Experimental and theoretical study on the synergistic inhibition effect of yridine derivatives and sulfur-containing compounds on the corrosion of carbon steel in CO2-saturated 3.5 wt.% NaCl solution

Tang¹,

Hu²,

Zhao³

et al. 2018

Preprint

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The corrosion inhibition performance of pyridine derivatives (4-methylpyridine and its quaternary ammonium salts) and sulfur-containing compounds (thiourea and mercaptoethanol) with different molar ratios on carbon steel in CO2-saturated 3.5 wt.% NaCl solution was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy and scanning electron microscopy. The synergistic corrosion inhibition mechanism of mixed inhibitors was elucidated by the theoretical calculation and simulation. The molecule of pyridine derivatives compound with larger volume has the priority to adsorb on the metal surface, while the molecules of sulfur-containing compounds with smaller volume fill in vacancies. A dense adsorption film would be formed when 4-PQ and sulfur-containing compounds are added at a proper mole ratio.

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Understanding the corrosion inhibition of carbon steel and copper in sulphuric acid medium by amino acids using electrochemical techniques allied to molecular modelling methods

Cited by 198 publications

References 54 publications

Synthesis of a polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

Synthesis of a polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

Synthesis, Characterization, and Corrosion Inhibition Potential of Novel Thiosemicarbazone on Mild Steel in Sulfuric Acid Environment

Experimental and theoretical study on the synergistic inhibition effect of yridine derivatives and sulfur-containing compounds on the corrosion of carbon steel in CO2-saturated 3.5 wt.% NaCl solution

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