The effect of surfactants on the electropolishing behavior of copper in orthophosphoric acid

Taha, A.A.; Ahmed, A. M.; Rahman, H.H. Abdel; Abouzeid, Fatma M.

doi:10.1016/j.apsusc.2013.04.017

Cited by 23 publications

(13 citation statements)

References 34 publications

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“…is phenomenon might occur through the dipole interaction type between unshared electron pairs of oxygen atom or π-electrons (the extract aromatic ring constituents which considered a wealthy electron source) with the vacant, low energy d-orbitals of iron surface atom. Consistent with the literature molecule with OH groups, complexes with divalent ions may be willingly formed [20][21][22].…”

Section: Electropolishing Of C-steel In H 3 Po 4 With Naturalsupporting

confidence: 81%

“…In the presence of 500 ppm extract (Figure 10(j)), the C-steel cracks, heterogeneity, and pits are significantly reduced owing to the protective adsorption film formation offered by guava leaves extract, and clearly, a smooth and regular surface is noticed. e leveling and brightening influences were noticeably improved by the addition of Guava leaves extract where guava leaves extract are satisfying the channels and grain boundaries, and also, the etching effect is removed [27] By comparing the effect of four extracts, it is noticed that the well-polished and uniform C-steel surface is obtained by the addition of 500 ppm marjoram extract where a completely smooth, even, and uniform surface is obtained, and this behavior confirmed the data obtained from the polarization and weight loss method since marjoram extract records highest % inhibition. Table 4 shows that the roughness (Ra) diminished from 2.7 μm to 0.52 μm 8 M H 3 PO 4 -free solution.…”

Section: Kinetic Point Of View For the Electropolishing Processmentioning

confidence: 97%

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The Electropolishing of C-Steel in Orthophosphoric Acid Containing Methanolic Plant Extract

Taha

Abouzeid

Elsadek

et al. 2020

Journal of Chemistry

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Plant extracts have been regarded as “green” alternatives as additives for metal electropolishing improvement. Therefore, understanding the electrochemical properties and the reaction mechanisms of the electroactive compounds from the plant extracts is necessary to further explore the mechanism and application of the plant extract-based additives for metal dissolution. The C-steel electropolishing behavior in orthophosphoric acid using the galvanostatic polarization and weight loss methods was ascertained. This was inspected via anode potential-limiting current relationship measurement and comparison in a solution of regularly mounting concentrations (from 50 to 1800 ppm of methanolic marjoram, coriander seeds, chamomile, and guava leaves extract), and the influence of temperature on the dissolution kinetics was investigated. Surface morphologies, roughness, and reflection of investigated specimens were inspected with a scanning electron microscope (SEM), profilometry, and Vis-IR spectroscopy. Addition of methanolic plant extract to the electropolishing solution results in a lower limiting current. Retardation percentage gained from mass loss measurement is comparable with those obtained from measurements of galvanostatic polarization. Addition of 500 ppm of marjoram, coriander, chamomile, and guava leaves increases the degree of surface brightness and reflectance to 64.9, 56.59, 27, and 24.5, respectively, relative to electropolishing electrolyte-free solution 16. The roughness (Ra) decreased from 2.7 μm to 0.52 μm without addition of any material. Ra values are 0.28, 0.23, 0.21, and 0.17 μm in the presence of guava leaves, chamomile, coriander seeds, and marjoram.

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Section: Electropolishing Of C-steel In H 3 Po 4 With Naturalsupporting

confidence: 81%

Section: Kinetic Point Of View For the Electropolishing Processmentioning

confidence: 97%

The Electropolishing of C-Steel in Orthophosphoric Acid Containing Methanolic Plant Extract

Taha

Abouzeid

Elsadek

et al. 2020

Journal of Chemistry

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“…Many studies focused on instructions about the favorable impact of adding certain organic compounds (carboxylic acids or their salts, aldehydes, amines, alcohols) on the process of electrochemical polishing of copper in phosphoricacid solutions [7][8][9][10][11][12][13][14][15][16][17]. The most commonly used as additives are the saturated, unsaturated and aromatic alcohols whose introduction reduces the limiting current density, prevents point etching and metal etching.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Establishing the patterns in anode behavior of copper in phosphoric acid solutions when adding alcohols

Sil'chenko

Pilipenko

Pancheva

et al. 2018

EEJET

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Досліджені анодні поляризаційні залежності мідного електрода у фосфатно-спиртових розчинах. Одержані залежності можна розділити на ділянки, кожна з яких відповідає протіканню певних електрохімічних реакцій у заданому діапазоні потенціалів. Перша ділянка відповідає анодному розчиненню міді, друга-формуванню на поверхні міді пасивуючої оксидно-сольової плівки і дифузійному режиму розчинення металу. Після досягнення потенціалу розкладання води розчинення мідного електрода супроводжується окисленням молекул Н 2 О. Встановлена відповідність особливостей розчинення міді поляризаційним залежностям електрода. Електрохімічному травленню міді відповідає діапазон потенціалів електрода 0-0,8 В. Утворення оксидно-сольової плівки при потенціалах 1-2 В обумовлює іонізацію міді у дифузійному режимі і приводить до переважного розчинення мікронерівностей металу з формуванням блискучої поверхні електрода. Зміщення потенціалу анода до величин, більших за 2 В, приводить до появи точкового травлення на поверхні міді внаслідок місцевого порушення суцільності пасивної плівки. Додавання до розчинів фосфатної кислоти етанолу знижує густину струму анодного розчинення міді в стаціонарній області до значень 0,2-2 А•дм-2. Етанол сприяє одержанню блискучої поверхні міді. При с(С 2 Н 5 ОН)>30 % ефект полірування зникає. Бутиловий спирт є ефективним інгібітором травлення міді і в його присутності j a знижується до 0,1-1 А•дм-2. Добавка C 4 H 9 OН обумовлює формування поверхні з сильним блиском і мінімальною кількістю точок травлення. При вмісті с(C 4 H 9 OН)>50 % поверхня міді має значну кількість точок травлення. Інгібуюча дія гліцерину близька до дії бутанолу. Форма поляризаційної залежності обумовлюється вмістом C 3 H 8 O 3 у розчині. При підвищенні с(C 3 H 8 O 3)>20 % полірування не відбувається і поверхня електрода має матовий вигляд. Отримані дані показують, що анодна поведінка міді залежить від природи добавки, що, залежно від необхідності, можна використовувати для розробки електролітів полірування або розмірної обробки міді Ключові слова: електрохімічне полірування, пасивна плівка, дифузійне розчинення, пітінг, анодна поляризація, розмірна обробка

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“…The limiting current was determined by polarization curves were plotted by increasing the cell current stepwise and measuring the corresponding steady state anode potential [14,15]. Anode potential was measured against a reference steel electrode placed in the cup of luggin tube whose tip is placed 0.5 mm from the anode surface.…”

Section: Measurements Of the Limiting Currentmentioning

confidence: 99%

“…Dimensional analysis was investigated to correlate mass transfer during electropolishing reaction in presence of polymers under forced convection condition (by using rotating cylinder electrode RCE). Physical properties of solution such as density and viscosity were studied [14].…”

Section: Introductionmentioning

confidence: 99%

Study the Mettalic Finishing and Corrosion Control Processes for Carbon Steel over Head Pipes Using Polymer Molecules

El-Shamy¹

2017

MOJBOC

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Carbon steel has wide applications in industry (especially in petroleum industry, e.g. pipelines out from the top of distillation towers (over head pipes), pressure vessels, nozzles etc.) and domestic life. Study the phenomenon of electropolishing which is important as metallic finishing process which takes place before electroplating of metal. This work is devoted to study the electropolishing of carbon steel in phosphoric acid in presence of polymers molecules (Starch, Gelatin, Agar, Chitosan, Arabic gum, Cellulose acetate, Cellulose and Carboxymethyl cellulose sodium salt). The rate of electropolishing of carbon steel in phosphoric acid solution in case of applied various affecting factors was investigated by estimated polarization curves from values of current and voltage that were obtained from the electrochemical cell. Morphology of the specimens after the experiment is monitored using scanning electron microscope (SEM). The (SEM) micrographs support the experimental measurements and give more light on carbon steel surface. Finally, samples of industrial waste water are collected from a drain of vacuum distillation tower over head pipes in Alexandria petroleum company and ferrous ions Fe +2 concentrations are determined in case of presence and absence of polymers molecules in order to judge the role of these polymers as a corrosion inhibitors on the ability to control the corrosion on carbon steel over head pipes. Keywords:

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The effect of surfactants on the electropolishing behavior of copper in orthophosphoric acid

Cited by 23 publications

References 34 publications

The Electropolishing of C-Steel in Orthophosphoric Acid Containing Methanolic Plant Extract

The Electropolishing of C-Steel in Orthophosphoric Acid Containing Methanolic Plant Extract

Establishing the patterns in anode behavior of copper in phosphoric acid solutions when adding alcohols

Study the Mettalic Finishing and Corrosion Control Processes for Carbon Steel over Head Pipes Using Polymer Molecules

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