Electrodeposition of Zn–Mn alloys at high current densities from chloride electrolyte

Bučko, Mihael; Rogan, Jelena; Jokić, Bojan; Mitrić, Miodrag; Lačnjevac, U.Č.; Bajat, Jelena B.

doi:10.1007/s10008-013-2004-8

Cited by 27 publications

(43 citation statements)

References 32 publications

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“…In the same range of cathodic potential, a previous work showed that the Mn content reaches 17.9 wt% owing to the synergistic effect of Triton X100 and 3-hydroxybenzaldehyde [32]. In other studies dealing with Zn-Mn alloy from an additives-free bath, using very high cathodic potential of − 2 V vs. SCE (corresponding to a current density of 300 mA/ cm 2 ) leads only to 18.8 wt% of Mn [21]. Once the Mn and Zn percentage, the real current efficiency of the plating process is estimated from the ratio of the measured and the calculated weight of Zn-Mn coatings.…”

Section: Influence Of Sdipns On the Alloy Compositionmentioning

confidence: 92%

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Effect of sodium diisopropylnaphthalene sulfonate on Zn-Mn alloys electrodeposition

Loukil

Feki

2020

J Solid State Electrochem

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A novel additive sodium diisopropylnaphthalene sulfonate (SDIPNS) was investigated in Zn-Mn electrodeposition on steel from chloride bath. To this end, cyclic voltammetry was performed in absence and presence of SDIPNS to study different electrochemical systems. Electrochemical data showed that SDIPNS increases Zn deposition overpotential, resulting from strong adsorption of SDIPNS molecules on the cathode surface. The effects of scan rate, switching potentials on the electrochemical behavior of Zn-Mn co-deposition were investigated. The variation of scan rate reveals that the Zn-Mn co-deposition is associated with charge transfer coupled with the mass transfer. SDIPNS concentration was investigated with regard to the Mn content in the final coatings. The chemical composition result showed that Mn-rich deposits, containing 20 wt.% of Mn, are successfully deposited under low cathodic potential (E = − 1.52 V vs. Ag/AgCl). The surface characterization of Zn-Mn coatings was explored by scanning electron microscopy (SEM). The presence of SDIPNS in the electrolytic bath permits to obtain compact, well adherent, and fined grain Mn-rich alloys.

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Section: Influence Of Sdipns On the Alloy Compositionmentioning

confidence: 92%

“…Simultaneous reduction of Zn 2+ and Mn 2+ cations can merely be achieved if their reduction potentials are close [19][20][21][22][23]. It is advisable to note that the reduction potential depends on the respective standard redox potential (E), the activity of the corresponding metallic ion in the solution, and the overpotential [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of sodium diisopropylnaphthalene sulfonate on Zn-Mn alloys electrodeposition

Loukil

Feki

2020

J Solid State Electrochem

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“…However, Sylla et al [11] obtained dendritic and growing powdery coatings rich in Mn that cannot be used as anti-corrosion coatings. The high Mn content in the Zn-Mn deposit is not a sufficient condition to improve corrosion resistance [12][13][14]. A combination of a high Mn content and a good morphology is necessary.…”

Section: Introductionmentioning

confidence: 99%

“…A combination of a high Mn content and a good morphology is necessary. The deposit morphology has a decisive effect on corrosion resistance, compared to the chemical composition [10,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of ZnMn Coatings Magnetoelectrodeposited

2022

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The zinc–manganese alloy coatings have been obtained without and with superimposition of a 0.3 T magnetic field in a parallel direction to the working surface electrode. The electrodeposition during 30 min, for two applied potentials (E = −1.6 V/SCE and E = −1.8 V/SCE) in an electrochemical bath with the (Zn2+)/(Mn2+) concentration ratio equal to 0.5. The structural, the morphological, and the chemical composition characteristics of the deposits have been studied. It has been found that the applied potentials modify the structural properties of the deposits, η phase-rich deposits elaborated for E = −1.6 V/SCE, and MnZn3-rich deposits elaborated for E = −1.8 V/SCE. The magnetohydrodynamic convection favors the manganese content of the deposit. The corrosion behavior of these coatings has been analyzed in 3.5% NaCl solution by free corrosion potential measurements and electrochemical impedance spectroscopy. The different results show that the corrosion resistance of these zinc–manganese alloy coatings is linked to their structure, to their composition, and to the magnetic field amplitude used during the electrodeposition process.

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“…that urea is reduced together with HER. It was reported earlier [17,18] that hydrogen evolution resulted from the electrochemical reduction of urea, according to the reaction:…”

Section: Voltammetric Studymentioning

confidence: 99%

Manganese electrodeposition from urea-rich electrolyte

Vuruna

Bučko

Radović

et al. 2015

Maced. J. Chem. Chem. Eng.

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Pure manganese coatings were prepared on the steel (AISI 4340) electrode by a non-conventional electrodeposition method, in the presence of 8 mol dm -3 of urea as a plating additive. The influence of urea on the electrodeposition of Mn was investigated by cyclic voltammetry. The morphology of the coatings was studied by scanning electron microscopy (SEM), and their elemental composition by energy dispersive X-ray spectrometry (EDS). The results showed that the presence of urea in the solution increased the current efficiency for metal reduction for around 20%, and depending on the applied deposition potential, urea may act either as a complexing agent or through the adsorption mechanism. Moreover, urea improves the characteristics of Mn deposits, i.e. their adhesiveness, porosity, compactness, and appearance. Except for oxygen, as part of the Mn corrosion product at the coating surface, no carbon or nitrogen incorporation was detected in the deposits by EDS.Keywords: urea; electrodeposition; Mn coating; morphology ЕЛЕКТРОДЕПОЗИЦИЈА НА МАНГАН ОД ЕЛЕКТРОЛИТ БОГАТ СО УРЕАПриготвени е филм од чист манган врз челична (AISI 4340) електрода со конвенционален метод на електродепозиција во присуство на 8 mol dm -3 уреа како адитив. Влијанието на уреата врз електродепозицијата на Mn беше испитувано со циклична волтаметрија. Морфологијата на филмот беше студирана со скенирачка електронска микроскопија (SEM), а елементарниот состав со енергетски дисперзивна спектрометрија со Х-зраци (EDS). Резултатите покажаа дека присуството на уреа во растворот ја зголемува ефикасноста на струјата со намалување на металот за околу 20% и во зависност од потенцијалот на депозиција уреата може да дејствува или како комплексирачко средство или преку атсорпционен механизам. Исто така, уреата ги подобрува карактеристиките на депозитите на Mn, т.е. нивната атхезивност, порозност, компактност и изглед. Освен кислород како дел од корозивниот продукт на Mn на површината на филмот, со EDS не беа детектирани инкорпорирани депозити на јаглерод или азот.

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Electrodeposition of Zn–Mn alloys at high current densities from chloride electrolyte

Cited by 27 publications

References 32 publications

Effect of sodium diisopropylnaphthalene sulfonate on Zn-Mn alloys electrodeposition

Effect of sodium diisopropylnaphthalene sulfonate on Zn-Mn alloys electrodeposition

Corrosion Behavior of ZnMn Coatings Magnetoelectrodeposited

Manganese electrodeposition from urea-rich electrolyte

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