The inhibition performance of long-chain alkyl-substituted benzimidazole derivatives for corrosion of mild steel in HCl

Zhang, Dongqin; Tang, Yongming; Qi, Sijun; Dong, Dazhong; Cang, Hui; Lu, Gang

doi:10.1016/j.corsci.2015.10.002

Cited by 181 publications

(46 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The experimental data were fitted by some adsorption isotherms, and based on the results, the Freundlich adsorption isotherm could best fit the adsorption behavior of inhibitor B, whereas HB and NB follow the Langmuir adsorption isotherm. The Freundlich and Langmuir isotherms were obtained through plotting C inh / θ versus C inh and log θ versus log C inh , respectively, as shown in Figure and characterized as below:

\frac{C_{inh}}{θ} = \frac{1}{K_{ads}} + C_{inh},

ln θ = ln K_{ads} + f ln C_{inh},

where C inh , K ads , and θ are the inhibitor concentration, the equilibrium constant of the adsorption–desorption process, and the surface coverage of the metal by inhibitor molecules, respectively. The parameter of “ f ” gives the adsorption intensity .…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical evaluation of two benzimidazole derivatives for steel corrosion protection in HCl

Zafari

Sarabi

Movassagh

2019

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The introduction of two new benzimidazole derivatives, 2-nonyl-1H-benzo [d] imidazole (NB) and 2-benzyl-1-hexyl-1H-benzo [d]imidazole (HB), as corrosion inhibitors for steel is presented, and their activities are compared with 1Hbenzo[d]imidazole (B). The experimental performance of these molecules was evaluated by electrochemical techniques, surface observations, and contact angle measurement. The results showed the prominent action with inhibition efficiencies of 98.8% and 99.3% for 3 mM of NB and HB, respectively, at 303K. They are adsorbed on the metal surface base on Langmuir isotherm. It is noteworthy to note that increment of environment acidity causes more efficiency for both molecules so that the order of inhibitive activity in different pHs is pH = 2>pH = 1>pH = 0.1. Additionally, HB provides little better protection than NB. Statistical analysis was conducted to identify influential factors on the efficiency of HB and NB. A general factorial model in the main effect order was used by design of experiment 7 software. Analysis of variance resulted in acceptable R 2 values of 99% and 98% and significance of the applied model. Quantum chemical calculations were carried out to find the optimum structure, molecular parameters, and local reactive sites in gas and solution phase. Calculations exhibited a planar structure for 1-hexyl-1H-benzo[d]imidazole and 2-nonyl-1H-benzo [d]imidazole that is the reason of their high efficiencies.

show abstract

\frac{C_{inh}}{θ} = \frac{1}{K_{ads}} + C_{inh},

ln θ = ln K_{ads} + f ln C_{inh},

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical evaluation of two benzimidazole derivatives for steel corrosion protection in HCl

Zafari

Sarabi

Movassagh

2019

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…Ayrıca 3AMP yapısında bulunan amin grubu sayesinde yumuşak çelik yüzeyine daha kuvvetli adsorplanabilir. Çünkü N gibi ortaklanmamış elektron çifti içeren sübstitüentler içeren yapılarda elektron yoğunluğu yüksek bölgeler sayesinde metal yüzeyine tutunma olasılığı artmaktadır [9][10][11][12][13][14][15][16]. 3AMP molekülü hem heterosiklik halkadaki N bölgesi hem de amin ucundaki N bölgesi sayesinde adsorpsiyonu destekleyebilir.…”

Section: öNceki̇ çAlişmalarunclassified

Yumuşak Çeliğin Korozyon Davranışı

Mert

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

ÖzBu çalışmada yumuşak çeliğin (YÇ) asidik ortamındaki korozyon davranışına 3-Amino metil piridin'in (3AMP) inhibitör etkisi araştırılmıştır. Elektrokimyasal teknikler (elektrokimyasal impedans spektroskopisi ve polarizasyon ölçümleri) ve kuantum kimyasal hesaplamalar uygulanmıştır. Elde edilen sonuçlara göre; 3AMP'nin inhibisyon etkinliği artan 3AMP derişimi ile artış göstermiştir. 50 mM 3AMP içeren 0,5 M HCl çözeltisinde inhibisyon etkinliği %97 olarak tespit edilmiştir. Polarizasyon ölçümleri 3AMP'nin hem katodik hem de anodik reaksiyonların hızını azalttığını göstermektedir. Yüksek inhibisyon etkinliği, teorik olarak belirlenen yüksek HOMO enerjisi (-6,937 eV), dipol momenti (2,473 D) ve düşük LUMO enerjisi (-1,05 eV) ile ilişkilendirilmiştir. Belirlenen Mulliken yüklere göre; N atomları üzerindeki negatif yük sebebiyle 3AMP'nin yumuşak çelik yüzeyine adsorpsiyonunun amin ve/veya N ucundan gerçekleşebileceği düşünülmektedir. Anahtar Kelimeler: Korozyon, Yumuşak çelik, 3-Amino metil piridin The Corrosion Behavior of Mild Steel AbstractIn this study, the inhibition effect of 3-aminomethyl pyridine (3AMP) on mild steel corrosion behavior in acidic medium is investigated. The electrochemical techniques (electrochemical impedance spectroscopy and polarization measurements) and quantum chemical calculations were obtained. The results showed that; inhibition efficiencies increase with increasing concentration of 3AMP. The inhibition efficiency is 97% in 50 mM 3AMP containing 0.5 M HCl solution. It is found that 3AMP retards both anodic and cathodic reactions according to polarization measurements. The high inhibition efficiency of 3AMP is attributed to the high value of EHOMO (-6.937 eV), dipole moment μ (2.473 D) and low value of ELUMO (-1.049 eV). According to calculated Mulliken charges; the adsorption of 3AMP may be occurred on amine and/N terminal of molecule.

show abstract

“…Then it adsorbs on the metallic materials and mitigates corrosion. Organic compounds in general have been extensively investigated as corrosion inhibitors for steel in different corrosive environments (Abouchane et al 2015;Adardour et al 2015;Ghanbari et al 2010;Migahed et al 2015;Sıgırcık et al 2016;Zhang et al 2015Zhang et al , 2016. These compounds usually contain different heteroatoms, such as N, S, O, and P, which act as active centres for adsorption on the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition and surface analysis of amines on mild steel in chloride medium

et al. 2016

View full text Add to dashboard Cite

In this study, the corrosion inhibition effectiveness of eight amines, i.e. 2-ethylhexyl amine, aniline, benzylamine, butylamine, ethylamine, isopropylamine, octylamine, and triethanolamine, on C15 grade mild steel in 3 wt% NaCl solution is reported. The corrosion inhibition performance of the amines was studied using immersion tests at 25 and 70°C, with and without the addition of KI as a possible intensifier. Among the inhibitors tested at 0.1 wt% concentration, the lowest corrosion rates were obtained for specimens immersed in solutions containing 2-ethylhexyl amine at 25°C and triethanolamine at 70°C. The highest inhibition effectiveness at 25°C among all amines tested was obtained for 1.0 wt% butylamine with the addition of 0.5 wt% KI, while at 70°C the lowest corrosion rate was obtained for specimens inhibited with 1.0 wt% isopropylamine. Surface analysis was subsequently performed on specimens inhibited by the most effective inhibitors. Adsorption of the selected amines on the C15 grade mild steel surface was confirmed by ATR-FTIR. 3D-profilometry showed a reduction in the surface roughness (less corroded) for the specimens inhibited with these inhibitors compared to the non-inhibited specimens.Contact angle measurements showed that all of the tested specimens were hydrophilic.

show abstract

The inhibition performance of long-chain alkyl-substituted benzimidazole derivatives for corrosion of mild steel in HCl

Cited by 181 publications

References 45 publications

Experimental and theoretical evaluation of two benzimidazole derivatives for steel corrosion protection in HCl

Experimental and theoretical evaluation of two benzimidazole derivatives for steel corrosion protection in HCl

Yumuşak Çeliğin Korozyon Davranışı

Corrosion inhibition and surface analysis of amines on mild steel in chloride medium

Contact Info

Product

Resources

About