The effect of some hydrazine derivatives on the corrosion of Al in HCl solution

Moussa, M. N. H.; Taha, F. I. M.; Gouda, M. M.; Singab, G. M.

doi:10.1016/0010-938x(76)90124-4

Cited by 37 publications

(5 citation statements)

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“…22 This is an important consideration, because hydrazine can (catalytically) reduce oxygen on various surfaces, a process that is exploited for corrosion protection. [23][24][25][26] Thus, the faradaic response for hydrazine electro-oxidation (especially at trace levels) might be expected to change in the presence of O 2 in a manner that depends on the electrode structure, as we consider herein.…”

Section: Introductionmentioning

confidence: 99%

“…Liquid hydrazine is easily transferred and its oxidation offers relatively high power density with carbon-free products, making it a promising fuel for low temperature fuel cells. − Hydrazine is also important in the pharmaceutical industry, as a common starting material in the synthesis of many pharmaceutical compounds. , However, it is often a key impurity in pharmaceutical products, and its high toxicity has led to the development of (electrochemical) hydrazine sensors. − Voltammetric and amperometric hydrazine analysis is usually performed in air, and the role of oxygen in hydrazine detection is rarely taken into account . This is an important consideration, because hydrazine can (catalytically) reduce oxygen on various surfaces, a process that is exploited for corrosion protection. − Thus, the faradaic response for hydrazine electro-oxidation (especially at trace levels) might be expected to change in the presence of O 2 in a manner that depends on the electrode structure, as we consider herein.…”

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Voltammetric Scanning Electrochemical Cell Microscopy: Dynamic Imaging of Hydrazine Electro-oxidation on Platinum Electrodes

et al. 2015

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(2015) Voltammetric scanning electrochemical cell microscopy : dynamic imaging of hydrazine electro-oxidation on platinum electrodes. Analytical Chemistry Permanent WRAP url: http://wrap.warwick.ac.uk/67791 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work of researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-forprofit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher's statement:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see link to Published Work, http://pubs.acs.org/page/policy/articlesonrequest/index.html]The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. Abstract:Voltammetric scanning electrochemical cell microscopy (SECCM) incorporates cyclic voltammetry measurements in the SECCM imaging protocol, by recording electrochemical currents in a wide potential window at each pixel in a map. This provides much more information compared to traditional fixed potential imaging. Data can be represented as movies (hundreds of frames) of current (over a surface region) at a series of potentials and are highly revealing of subtle variations in electrode activity. Furthermore, by combining SECCM data with other forms of microscopy, e.g. scanning electron microscopy and electron backscatter diffraction data, it is possible to directly relate the current-voltage characteristics to spatial position and surface structure. In this work we use a 'hopping mode', where the SECCM pipet probe is translated towards the surface at a series of positions until meniscus contact. Small amounts of residue left on the surface, upon probe retraction, demark the precise area of each measurement. We use these techniques to study hydrazine oxidation on a polycrystalline platinum substrate in air and in a deaerated environment. In both cases, the detected faradaic current shows a structural dependence on the surface crystallographic orientation. Significantly, in the presence of oxygen (aerated solution) the electrochemical current decreases strongly for alm...

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Voltammetric Scanning Electrochemical Cell Microscopy: Dynamic Imaging of Hydrazine Electro-oxidation on Platinum Electrodes

et al. 2015

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“…Various surfactants as 1, 1-(laurly amido) propyl ammonium chloride are being studied as a corrosion inhibitor for pure aluminum in acid media [5][6]. Many of organic compounds as electroactiveconducting polymers [7][8][9][10], carboxylic organic acids [11,12], fatty acids [13], dicyandiamide and some of its related compounds [14], hydrazine compounds [15], triazole and thiazole derivatives [16], were also found to inhibit the corrosion of aluminum. Sayyah et al [17,18] studied the inhibition effect of the series of the prepared monomeric surfactants and their analog polymers with different hydrophilic side chain length on the corrosion of aluminum in acid medium.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Evaluation on the Effect of the Terminal Side Chain of a Polymeric Surfactant on the Inhibition Efficiency of Aluminum Corrosion in Acid Medium

Sayyah¹,

El-Deeb²,

El‐Rehim³

et al. 2014

Port. Electrochim. Acta

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Inhibition effect of poly 3-dodecyloxy aniline polymeric surfactant (PC 12 H) on the corrosion of aluminum in 0.5 M HCl solution was investigated using potentiodynamic polarization technique under different experimental conditions. Inhibition efficiency and thermodynamic functions for dissolution and adsorption of PC 12 H are compared with Poly 3-(dodecyloxy sulfonic acid) aniline (PC 12 SO 3 H) to explain the effect of terminal side chain on the corrosion protection. Data show that the presence of-SO 3 H as a terminal group in PC 12 SO 3 H decreases the inhibition efficiency from 88.7%, in case of PC 12 H, to 55.1% in case of PC 12 SO 3 H. Quantum chemical calculations were performed on PC 12 H and PC 12 SO 3 H to investigate the relationship between the molecular structures and their inhibition efficiencies.

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“…Sulphur and/ or nitrogen containing heterocyclic compounds with various substituents are considered to be effective corrosion inhibitors. Thiophene, hydrazine derivatives offer special affinity to inhibit corrosion of metals in acid solutions [9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Thiophene derivatives as effective inhibitors for the corrosion of steel in 0.5 m H2SO4

et al. 2005

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The influence of thiophene and five of its substituted derivatives on the corrosion inhibition of steel in 0.5 M H 2 SO 4 solution was studied using weight-loss, electrochemical polarisation, and impedance measurements. 5-tert-butoxythiophene-2-carbaldehyde phenylhydrazone (TBCP) is the best inhibitor and its inhibition efficiency increases with increase in concentration to attain 87% at 5Â10 )3 M. Potentiodynamic polarisation studies clearly reveal that it acts essentially as a cathodic inhibitor. The partial p-charge on atoms has been calculated. A correlation between the highest occupied molecular orbital E HOMO and inhibition efficiencies was sought. The inhibition efficiency of TBCP is not affected by rise in temperature in the range 298-353 K. E% values obtained from weight-loss and electrochemical methods were in good agreement. Adsorption of TBCP on steel has an S-shaped adsorption isotherm.

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The effect of some hydrazine derivatives on the corrosion of Al in HCl solution

Cited by 37 publications

References 3 publications

Voltammetric Scanning Electrochemical Cell Microscopy: Dynamic Imaging of Hydrazine Electro-oxidation on Platinum Electrodes

Voltammetric Scanning Electrochemical Cell Microscopy: Dynamic Imaging of Hydrazine Electro-oxidation on Platinum Electrodes

Experimental and Theoretical Evaluation on the Effect of the Terminal Side Chain of a Polymeric Surfactant on the Inhibition Efficiency of Aluminum Corrosion in Acid Medium

Thiophene derivatives as effective inhibitors for the corrosion of steel in 0.5 m H2SO4

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