Pyridine–pyrazole compound as inhibitor for steel in 1M HCl

Bouklah, M.; Attayibat, Ahmed; Hammouti, B.; Ramdani, Abdelkrim; Radi, Smaail; Benkaddour, M.

doi:10.1016/j.apsusc.2004.07.001

Cited by 60 publications

(28 citation statements)

References 12 publications

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“…Bouklah ve arkadaşları [8] 3,5-dimetil-1H-pirazol (P1), 3,5-dimetil-1H-piridin (P2) ve 2-(3-methil-1H-pirazol-5-yl) piridin (P3) moleküllerinin inhibisyon özelliklerini 1 M HCl'de araştırmıştır. Bu üç farklı kimyasal yapıdaki inhibitörler kıyaslandığında P3'ün 10 -3 M'lık çözeltisinde en yüksek inhibisyon etkinliği (%90) sergilediği tespit edilmiştir.…”

Section: öNceki̇ çAlişmalarunclassified

“…Bu durum piridin ve pirazol'ün sinerjistik etkisi ile açıklanmıştır. P3'ün ∆G ads enerjisi oldukça yüksektir (-42 kj/mol) ve bu molekülün yüzeye kuvvetlice adsorplandığını göstermektedir [8].…”

Section: öNceki̇ çAlişmalarunclassified

“…Bu durumda aynı derişim değerlerinde, diğerlerine kıyasla [1][2][3][4][5][6][7][8] daha az madde tüketimi sağlanabilir. Ayrıca 3AMP yapısında bulunan amin grubu sayesinde yumuşak çelik yüzeyine daha kuvvetli adsorplanabilir.…”

Section: öNceki̇ çAlişmalarunclassified

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Yumuşak Çeliğin Korozyon Davranışı

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2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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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.

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Yumuşak Çeliğin Korozyon Davranışı

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2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…It is well known that pyrazole [8][9][10], bipyrazole [11][12][13][14][15][16], tripyrazole [17], triazole [18][19][20] and tetrazole [5,21] derivatives are excellent inhibitors of corrosion of many metals and alloys in aggressive media. Substitution in the pyrazole ring (R = H, CH 3 , CO 2 C 2 H 5 , etc.)…”

Section: Introductionmentioning

confidence: 99%

The effect of 1′,3,5,5′-tetramethyl-1′H-1,3′-bipyrazole on the corrosion of steel in 1.0 M hydrochloric acid

et al. 2011

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The effect of some prepared compounds, namely 3,5-dimethyl-1H-pyrazole (P1), 3(5)-amino-5(3)-methylpyrazole (P2), and 1 0 ,3,5,5 0 -tetramethyl-1 0 H-1,3 0 -bipyrazole (P3), on the corrosion behaviour of steel in 1.0 M hydrochloric acid solution as corrosive medium has been investigated at 308 K using weight-loss measurement, potentiodynamic polarisation, linear polarisation, and impedance spectroscopy (EIS). Generally, inhibition efficiency of the investigated compounds was found to depend on the concentration and nature of the inhibitor. P3 was a better inhibitor than P1 and P2, and its inhibition efficiency increased with increasing concentration of inhibitor, attaining 94% above 10 -3 M. Potentiodynamic polarisation studies clearly reveal that P3 acts essentially as a cathodic inhibitor. E (%) values obtained from different methods are in reasonably good agreement. EIS measurements show an increase of transfer resistance with inhibitor concentration. Partial p-charge on atoms was calculated. Correlation between the highest occupied molecular orbital energy E HOMO and inhibition efficiencies was sought. The temperature effect on the corrosion behaviour of steel in 1.0 M HCl without and with different concentrations of inhibitor P3 was studied in the temperature range 308 to 343 K. Thermodynamic data, for example heat of adsorption (DH ads ), entropy of adsorption (DS ads ) and free energy of adsorption (DG ads ) were calculated by use of thermodynamic equations. Kinetic activation data, for example E a , DH*, DS* and pre-exponential factor, were calculated, and are discussed. The inhibiting action of P3 on the corrosion of steel in 1-10 M hydrochloric acid was also studied by weight-loss measurement. The rate constant and reaction constant were calculated for the corrosion reactions. Adsorption of P3 on the steel surface in 1.0 M HCl follows the Langmuir isotherm model.

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“…Most organic inhibitors act by adsorption on the metal surface [13], N-heterocyclic compounds such as imidazole [14][15][16][17][18][19][20] and pyridine derivatives [21][22][23][24][25] inhibit the corrosion of many metals in acidic solutions with good protection. A thermodynamic model is an important tool for studying the mechanism of inhibition.…”

Section: Introductionmentioning

confidence: 99%

The effect of poly(vinyl caprolactone-co-vinyl pyridine) and poly(vinyl imidazol-co-vinyl pyridine) on the corrosion of steel in H3PO4 media

et al. 2007

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The inhibiting effect of two organic copolymers namely poly(vinyl caprolactone-co-vinyl pyridine) (PVCVP) and poly(vinyl imidazol-co-vinyl pyridine) (PVIVP) on the corrosion of steel in phosphoric acid was investigated at various temperatures. The study was carried out by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. Inhibition efficiency (E %) increased with polymer concentration to attain 85% at 10 -4 M for PVIVP. Adsorption of polymers on the steel surface in 2 M H 3 PO 4 followed the Langmuir isotherm model. EIS measurements show that the dissolution of steel occurs under activation control. Polarisation curves indicate that the tested polymers functioned as cathodic inhibitors. E % values obtained from various methods used are in good agreement with each other. The temperature effect on the corrosion behaviour of steel in 2 M H 3 PO 4 in the presence and absence of the inhibitor was studied in the temperature range 298-338 K. The adsorption free energy (DG o ads ) and the activation parameters (E a , DH o a , DS o a ) for the steel dissolution reaction in the presence of polymer were determined.

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Pyridine–pyrazole compound as inhibitor for steel in 1M HCl

Cited by 60 publications

References 12 publications

Yumuşak Çeliğin Korozyon Davranışı

Yumuşak Çeliğin Korozyon Davranışı

The effect of 1′,3,5,5′-tetramethyl-1′H-1,3′-bipyrazole on the corrosion of steel in 1.0 M hydrochloric acid

The effect of poly(vinyl caprolactone-co-vinyl pyridine) and poly(vinyl imidazol-co-vinyl pyridine) on the corrosion of steel in H3PO4 media

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