Adopting a multipurpose inhibitor to control corrosion of ferrous alloys in cooling water systems

Mahgoub, F. M.; Abd-El-Nabey, B. A.; El-Samadisy, Y. A.

doi:10.1016/j.matchemphys.2009.10.028

Cited by 61 publications

(22 citation statements)

References 13 publications

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“…Decrease in CPE, which can result from a decrease in local dielectric constant and/or an increase in the thickness of the electrical double layer, suggested that the inhibitor molecules were absorbed at the metal/solution interface. The values of n obtained for this inhibitor system were close to unity, which shows that the interface behaved in a nearly capacitive way [47].…”

Section: Electrochemical Impedance Spectroscopysupporting

confidence: 57%

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Chadli

Elazouzi

Khelladi

et al. 2017

Port. Electrochim. Acta

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This work is devoted to examine the effectiveness of pyrazoles 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) on corrosion of mild steel in a 1 M HCl solution, using weight loss measurement at concentration effects. The inhibitor (D) was synthesized in our laboratory. The formation of this pyrazole was carried out with hydrazine and α-unsaturated aldehydes, and the structure was checked by spectroscopic means, such as FT-IR, 1H NMR and 13C NMR. Polarization curves and electrochemical impedance spectroscopy (EIS) methods were used to assess both the corrosion rate and inhibition efficiency. Potentiodynamic polarization showed that D behaved as a mixed-type inhibitor. The Nyquist plots showed that, while D concentrations increased, charge-transfer resistance increased and double-layer capacitance decreased, involving increased inhibition efficiency. Adsorption of the inhibitor molecules corresponds to Langmuir adsorption isotherm. Quantum chemical calculations showed that the inhibitor was prone to be protonated in the acid, and the results were in full agreement with experimental observations.

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Section: Electrochemical Impedance Spectroscopysupporting

confidence: 57%

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Chadli

Elazouzi

Khelladi

et al. 2017

Port. Electrochim. Acta

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“…The result showed that the terpolymer molecular chain comprises carbonyl, allyloxy, amide, sulfonic acid, and ester. As demonstrated in this study, considerable performance benefits can be realized simply in static scale inhibition experiments for Ca 3 (PO 4 ) 2 and BaSO 4 . The results of the present study are summarized as follows:…”

Section: Discussionmentioning

confidence: 83%

Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca₃(PO₄)₂, BaSO₄, and Iron (III) hydroxide scales

Zhou

Yao

et al. 2014

J of Applied Polymer Sci

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The polymeric scale inhibition and dispersion agents (PAYS) were prepared by graft copolymerization of acrylic acid, allylpolyethoxy carboxylate (APEY) and 2-acrylamido-2-methyl-propanesulfonic acid by using ammonium persulfate as a radical initiator in aqueous solution, among which APEY was synthesized in laboratory. Structure of PAYS was characterized by Fourier transform infrared spectroscopy. Experimental data showed that the terpolymer was a high-efficient chelate sorbent, and it exhibited excellent ability for calcium orthophosphate, with approximately 96% efficiency at the dosage of 4 mg/L, as well as high efficiency toward barium sulfate scales nearly 80% inhibition. The effectiveness of PAYS depends on the agent concentration, temperature and the ratio of the reactant. The formation of Ca 3 (PO 4 ) 2 and BaSO 4 precipitates was characterized by scanning electron microscopy. It appeared that the crystal shape, size, and the morphology of scale changed apparently at the dosage of 4 and 15 mg/L, respectively. In addition, it has good effect on controlling iron (III) scaling. This study was also devoted to the understanding of the action mechanism of these inhibitors in suppressing the crystal nucleus formation and preventing the crystal growth. Based on the contrast experiment of scale formation, the supposing mechanism diagram was also delineated and analyzed in detail.

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“…Several other corrosion inhibitors have been proposed for use for ferrous metals in cooling systems as follows: 2,5-diphenylpyrazolo[1,5-c]pyrimidine-7(6H)thione, 5-methoxyphenyl-2-phenylpyrazolo[1,5-c]pyrimidine-7(6H)thione, 5-tolyl-2-phenylpyrazolo[1,5-c]pyrimidine-7(6H)thione, 5-tolyl-2-phenylpyrazolo[1,5-c]pyrimidine-7(6H)one, 2,5-diphenyl-3-iodopyrazolo[1,5-c]pyrimidine-7(6H)thione, 2,5-diphenyl-3-bromopyrazolo[1,5-c]pyrimidine-7(6H)thione, and so on [44].…”

Section: Organic Corrosion Inhibitorsmentioning

confidence: 99%

Corrosion Inhibitors in Cooling Water Systems

Чиркунов

Kuznetsov

2015

Mineral Scales and Deposits

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Adopting a multipurpose inhibitor to control corrosion of ferrous alloys in cooling water systems

Cited by 61 publications

References 13 publications

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca₃(PO₄)₂, BaSO₄, and Iron (III) hydroxide scales

Corrosion Inhibitors in Cooling Water Systems

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Adopting a multipurpose inhibitor to control corrosion of ferrous alloys in cooling water systems

Cited by 61 publications

References 13 publications

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Electrochemical and Theoretical Study of Pyrazole 4-(4,5-dihydro-1H-pyrazol-5-yl)-N,N-dimethylaniline (D) as a Corrosion Inhibitor for Mild Steel in 1 M HCl

Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca3(PO4)2, BaSO4, and Iron (III) hydroxide scales

Corrosion Inhibitors in Cooling Water Systems

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Product

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Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca₃(PO₄)₂, BaSO₄, and Iron (III) hydroxide scales