Elena Ionela Neacşu

Romanian Academy

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Cristina Donath

Romanian Academy

Virgil Constantin

Romanian Academy

K. I. Yanushkevich

National Academy of Sciences of Belarus

Ana Maria Popescu

Bucharest University of Economic Studies

ОФ

О. Ф. Демиденко

National Academy of Sciences of Belarus

Ana‐Maria Popescu

Romanian Academy

Vasile Soare

Institute of Non-ferrous and Rare Metals

Cora Vasilescu

Romanian Academy

Marian Burada

Institute of Non-ferrous and Rare Metals

ВВ

В. В. Малышев

International European University

Cooperative Institutions

Romanian Academy

University of Bucharest

Universitatea Națională de Știință și Tehnologie Politehnica București

Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering

Institute of Physical Chemistry

Academy of Romanian Scientists

Institute of Chemistry of New Materials of the National Academy of Sciences of Belarus

Czech Academy of Sciences, Institute of Physics

Institute of Non-ferrous and Rare Metals

Institute for Physics

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Microstructure, mechanical properties, and corrosion resistance of Ti-20Zr alloy in undoped and NaF doped artificial saliva

Metals and Materials International (2013)

José María Calderón Moreno Mónica Popa Steliana Ivanescu Cora Vasilescu Silviu Iulian Drob

10.1007/s12540-013-6031-x

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Citations (26)

Influence of Electrolysis Parameters on Mo and W Coatings Electrodeposited from Tungstate, Molybdate and Tungstate-Molybdate Melts

Revista de Chimie (2018)

В. В. Малышев Ангеліна Габ D. B. Shakhnin Cristina Donath Elena Ionela Neacşu

Molybdenum and tungsten coatings electrodeposition from halide-oxide and oxide melts has been realized. The influence of electrolysis conditions on physico-chemical properties of deposits has been studied. Coating structure control has been realized with the help of change of atmosphere composition above the bath and application of non-stationary current regimes during electrodeposition.

Tungstate

Sodium tungstate

10.37358/rc.18.9.6544

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Citations (1)

Evaluation of the microstructural, mechanical and anti‐corrosive properties of a new ternary Ti–15Zr–5Nb alloy in simulated oral environment

Materials and Corrosion (2013)

José María Calderón Moreno Cora Vasilescu Silviu Iulian Drob Elena Ionela Neacşu Mónica Popa

A new ternary Ti–15Zr–5Nb alloy was elaborated with the aim to satisfy the most stringent requirements of a good implant material. The alloy has α + β bi‐phase microstructure (by XRD and optical microscopy) and presents a proper combination between Young's modulus, elasticity and good ultimate tensile strength and 0.2% yield strength (from stress–strain tensile curve), indicating a good suitability as implant material. Electrochemical behaviour in artificial Carter‐Brugirard saliva of different pH values (3.96, 7.84, and 9.11) and composition (un‐doped and doped with 0.05 M NaF) that simulate the severe functional conditions in the oral cavity was evaluated. All electrochemical parameters of the new alloy revealed more favourable values than those of the CP Ti and Ti–6Al–4V ELI alloy, showing a more compact, resistant passive film formed on the new alloy surface. The corrosion rates and corresponding ion release rates for the new Ti–15Zr–5Nb alloy exhibited very low values (hundreds of times smaller) in comparison with similar commercial biomaterials. Electrochemical impedance spectra distinguished bi‐layered passive film formed by inner, barrier layer and outer, porous layer. X‐ray photoelectron spectra and scanning electron microscopy (SEM) observations proved that in time, protective compounds were deposited from saliva on the alloy surface, enhancing its corrosion resistance.

10.1002/maco.201307053

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Citations (21)

Structure, magnetic properties, corrosion resistance of 1.4541 stainless steel in surface seawaters

Studia Universitatis Babeș-Bolyai Chemia (2022)

О. Ф. Демиденко Ana‐Maria Popescu K. I. Yanushkevich Elena Ionela Neacşu Cristina Donath

We investigated the phase structure, magnetic properties, corrosion resistance, microstructure of 1.4541 (V2A) stainless steel through X-ray diffraction (XRD), magnetic measurement device, gravimetric/electrochemical methods, metallographic microscopy.Corrosion resistance was evaluated in natural seawaters of Mediterranean, Black and Aegean seas.The results show that crystal structure and specific magnetic characteristics are resistant to corrosion action of all seawaters at a temperature of 295 K.The greatest corrosive effect on studied alloy has the Mediterranean Seawater, corrosion penetration is about 0.1290 mm/year.Microscopy confirmed corrosion data.

10.24193/subbchem.2022.2.04

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Recovery of metals from anodic dissolution slime of electric and electronic waste (WEEE) by extraction in ionic liquids

Chemical Research in Chinese Universities (2017)

Popescu Ana Maria K. I. Yanushkevich Vasile Soare Cristina Donath Elena Ionela Neacşu

Source

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Corrosion Behavior of Some Steels in Ionic Liquids Based on Choline Chloride

Revista de Chimie (2018)

Elena Ionela Neacşu Virgil Constantin Cristina Donath K. I. Yanushkevich Aliona Zhivulka

The corrosion behaviour of special steels (OL44, OL52, SS1.4571) exposed to choline chloride (ChCl) based ionic liquids, has been investigated by polarization curves method at 80�C. Micrographic images before and after corrosion were obtained. The corresponding corrosion parameters in ChCl-Oxalic acid and ChCl-Malonic acid were calculated. The crystal structure was studied before and after the corrosion process by using X-ray diffraction method. The specific magnetization was investigated by ponderomotive method.

Oxalic Acid

Choline chloride

Malonic acid

10.37358/rc.18.10.6597

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Citations (2)

Influence of Seawater Corrosion on Structure and Magnetic Properties of the SR355JR and S355J2 Carbon Steels

Journal of the Mexican Chemical Society (2022)

Ana‐Maria Popescu О. Ф. Демиденко K. I. Yanushkevich Cristina Donath Elena Ionela Neacşu

Abstract. The corrosion behaviour of SR355JR and S355J2 carbon steels exposed to different seawaters (Black, Aegean and Mediterranean Sea) has been investigated by polarization measurements. The corresponding corrosion parameters were calculated. Micrographic images before and after immersion in the used seawaters corrosive medium were obtained. X-ray diffraction and ponderomotive methods respectively were used to determine the influence of the corrosion process on the crystal structure and specific magnetization of the studied steels. Resumen. En este estudio se investigó el comportamiento a la corrosión de los aceros al carbono SR355JR y S355J2 expuestos a diferentes aguas marinas (Mar Negro, Mar Egeo y Mar Mediterráneo) mediante mediciones de polarización. Se calcularon los parámetros de corrosión correspondientes. Se obtuvieron imágenes micrográficas antes y después de la inmersión en el medio corrosivo de las aguas marinas utilizadas. Para determinar la influencia del proceso de corrosión en la estructura cristalina y la magnetización específica de los aceros estudiados se utilizaron los métodos de difracción de rayos X y ponderomotivos respectivamente.

Carbon steel

10.29356/jmcs.v66i3.1761

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Citations (1)

ow and intermediate level aqueous radioactive waste treatment in a modular installation

Book of Abstracts (2023)

Elena Ionela Neacşu Laura Ruxandra Zicman M. Nicu L. Done

10.21175/rad.abstr.book.2023.44.5

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Magnetic Properties of Bulk and Thin Nd2Fe14B Films after Corrosion Action

Acta Physica Polonica A (2015)

Virgil Constantin Elena Ionela Neacşu A.M. Popescu A. I. Galyas О. Ф. Демиденко

The corrosion action for bulk and thin Nd2Fe14B lms magnets in dierent corrosion media was studied.The thin NdFeB lms of 100 nm ≤ d ≤ 1000 nm were deposited on glass substrate by ash evaporation method.The structure and microstructure of the samples were studied by X-ray diraction analysis, scanning electron microscopy.The temperature dependence of the magnetization before and after corrosion action was carried out by ponderomotive method in the temperature range 80 ≤ T ≤ 800 K.It is shown that the specic magnetizations of the thin NdFeB lms with d ≥ 1000 nm are comparable to those measured for the powder samples.The values of the coercive and saturation elds were determined from the hysteresis loops measurements.

10.12693/aphyspola.127.368

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Binding interactions of actinomycin D anticancer drug with bile salts micelles

Journal of the Serbian Chemical Society (2023)

Ana Maria Toader Izabella Dascalu Elena Ionela Neacşu Mirela Enache

The interactions of actinomycin D (ActD) anticancer drug with two bile salts of different hydrophobicity (sodium cholate (NaC) and sodium deoxycolate (NaDC) and the influence of these bile salts aggregates on the ActD?DNA complex was investigated in 10 mM phosphate buffer (pH 7.4) by UV?Vis spectroscopy (absorption and thermal denaturation). The binding strength of ActD to NaDC is higher than for NaC, and this difference attests stronger hydrophobic interactions between ActD and NaDC micelles. Also, the partition coefficient is significantly higher for NaDC micelles than for NaC micelles, in line with larger aggregates formed by NaDC. The spectral profile of ActD molecules in NaC and NaDC micelles, in comparison with different solvents, implies that ActD molecule experiences a hydrophobic environment in bile salts aggregates. Regarding the influence of NaC and NaDC aggregates on the ActD?DNA complex, it was shown that the presence of both bile salts micelles do not induce the deintercalation of ActD molecules from DNA duplex.

Denaturation (fissile materials)

10.2298/jsc221102004t

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Citations (4)