Novel isoxazolium cationic Schiff base compounds as corrosion inhibitors for carbon steel in hydrochloric acid

Negm, Nabel A.; Ghuiba, F.M.; Tawfik, Salah M.

doi:10.1016/j.corsci.2011.06.029

Cited by 128 publications

(34 citation statements)

References 61 publications

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“…Organic compounds containing hetero atoms in the functional groups, pi-electron in triple or conjugated double bonds and presence of aromatic rings in their structure are the major adsorption centres and are usually good inhibitors [17]. Several heterocyclic compounds such as methylthiophenyl derivatives [18], isoxazolium cationic Schiff base compounds [19], quinoline derivatives [20], sulphonamide compounds [21], thiadiazoles derivatives [22], imidazole derivatives [23], fluoroquinolones [24], pyrazole derivatives [25], pyridazine derivatives [26] and pyridine derivatives [27] have been reported as anticorrosion substances in various corrosive environments.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

2014

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Background A new class of nicotinamide derivatives viz., N-((1H-pyrrol-2-yl)methylene)nicotinamide, N-((methyl-(phenyl)amino)methylene)nicotinamide, N-nicotinoylbenzimidothioic acid and N-(4-(methylthio)benzylidene)nicotinamide have been synthesized and their corrosion inhibition effect on mild steel in 0.5 M HCl was investigated by mass loss, Tafel polarization technique and AC impedance measurements. Results The inhibition efficiency of the inhibitors on mild steel in 0.5 M HCl has been studied based on concentration, time interval and temperature. Potentiodynamic polarization studies showed that all the examined inhibitors suppress both anodic and cathodic process and behave as mixed type of corrosion inhibitors. Conclusions The adsorption of all the inhibitors was found to obey Langmuir isotherm model. Electrochemical impedance data revealed that polarization resistance (R P ) increases and double layer capacitance (C dl ) decreases as the concentration of the inhibitors increases. FTIR, EDX and SEM analyses were performed to study the film persistency of the inhibitors.

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Section: Introductionmentioning

confidence: 99%

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

2014

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“…Standard free energy of micellization DG mic and adsorption DG ads has played an important role in such understanding. The standard free energy of micellization and adsorption are given by [51] and the data are summarized in Table 2:…”

Section: Minimum Surface Areamentioning

confidence: 99%

Synthesis, characterization and antimicrobial activity of N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]alkyl ammonium bromide surfactant and their Co(II), Zn(II) and Sn(II) complexes

Tawfik

Zaky

2014

Res Chem Intermed

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Two-membered cationic surfactants namely: N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl)dodecane ammonium bromide (C12Q) and N,Nbis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]hexadecane ammonium bromide (C16Q) and their cobalt, tin and zinc complexes (C12QCo, C12QSn, C12QZn, C16QCo, C16QSn and C16QZn) were synthesized. The chemical structures of the synthesized compounds were confirmed using different spectroscopy tools. The surface activities of the synthesized surfactants were influenced by their chemical structures and the type of the transition metals. The synthesized cationic surfactants and their metal complexes were evaluated as biocides against Gram-positive bacteria (Bacillus subtilis and Micrococcus luteus), Gram-negative bacteria (Bordetella pertussis and Escherichia coli) and fungi (Candida albicans and Aspergillus niger), while the sulfate-reducing bacteria were tested against Desulfomonas pigra. The biological activity results showed that the cationic surfactants exhibit moderate to high efficiency against the tested microorganisms. The antimicrobial activity was strongly increased by complexation of these cationic surfactants with Co(II), Sn(II) and Zn(II) ions. The antimicrobial activity of the synthesized compounds against sulfate-reducing bacteria showed promising results in the field of biocides application.

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“…These surfactants are characterized by their extreme tendency towards biodegradation, which means the degradation of organic compounds using microorganisms to produce compounds of low molecular weight, such as alcohols and short-chain fatty acids. The withdrawal of toxic and nonbiodegradable surfactants from commercial use and their replacement with green and biodegradable surfactants is highly necessary [18][19][20][21][22][23][24][25][26][27][28][29]. The aim of this study is to synthesize some non-ionic surfactants derived from vanillin (a natural compound) and to study their surface activity and biodegradability, and also to evaluate these compounds as corrosion inhibitors for carbon steel in 0.5-M hydrochloric acid (HCl).…”

Section: Introductionmentioning

confidence: 99%

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

Tawfik

Negm

2015

Res Chem Intermed

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Four eco-friendly ('green') non-ionic surface active agents were synthesized via reaction of fatty acids obtained from hydrolysis of castor oil with vanillin. The products were then reacted with monoethanol amine to form a vanillin ester Schiff base. The vanillin ester Schiff base was ethoxylated using ethylene oxide gas in the presence of tri-ethyl amine as a catalyst to give the desired nonionic surfactants. The chemical structures of the obtained surfactants were characterized using FTIR and 1 HNMR spectroscopy. The inhibition effect of the four synthesized non-ionic surfactants derived from vanillin (VE15, VE20, VE40, and VE60) on the corrosion of carbon steel in acidic media of 0.5-M HCl was studied by weight loss, potentiodynamic and electrochemical impedance spectroscopy measurements. The results show that the synthesized inhibitors are effective inhibitors even at very low concentrations, and the adsorption on carbon steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic polarization curves reveal that the synthesized inhibitors behave as mixed-type inhibitors. Adsorption of used inhibitors led to a reduction in the double layer capacitance and an increase in the charge transfer resistance. Calculated DG ads o values indicated that the mechanism by which these inhibitors adsorb onto carbon steel in 0.5-M HCl solution is chemical adsorption. The surface activities of the synthesized surfactants were determined using surface tension measurements. The biodegradability of these surfactants indicates that the compounds readily degrade in the environment and can be considered as green corrosion inhibitors.

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Novel isoxazolium cationic Schiff base compounds as corrosion inhibitors for carbon steel in hydrochloric acid

Cited by 128 publications

References 61 publications

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

Corrosion inhibition effect and adsorption behaviour of nicotinamide derivatives on mild steel in hydrochloric acid solution

Synthesis, characterization and antimicrobial activity of N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]alkyl ammonium bromide surfactant and their Co(II), Zn(II) and Sn(II) complexes

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

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