M.L. Zheludkevich

M.L. Zheludkevich
Helmholtz-Zentrum Hereon | HZG · Institute of Surface Science

PhD

About

405
Publications
80,177
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
15,365
Citations

Publications

Publications (405)
Article
In this study, sodium salt of Ethylendiaminetetraacetic acid (EDTA), a strong and widely-used complexing agent, was utilized as an additive for a primary Mg-air battery electrolyte with a commercially pure magnesium anode. The electrolyte pH (ranged 7.0 to 11.0) was taken as the main parameter to explore the effect of EDTA on the discharge performa...
Article
Full-text available
Effective protective coatings are an essential component of lightweight engineering materials in a large variety of applications as they ensure structural integrity of the base material throughout its whole service life. Layered double hydroxides (LDHs) loaded with corrosion inhibitors depict a promising approach to realize an active corrosion prot...
Article
A strategy based on chelating agent addition was used to assist the in-situ growth of MgAl-layered double hydroxides (LDHs) films on magnesium alloy AZ31 in a relatively mild condition. The growth behavior of MgAl-LDH films was studied on the magnesium alloy AZ31 substrate as the sole source of Al³⁺ and/or adding aluminum compounds as a supplementa...
Article
Layered double hydroxides (LDHs), a class of two-dimensional (2D) brucite-like layers, have been effectively applied in diverse fields. However, the current synthesis methods restrict the in situ scaling-up and tunable production of LDH-based materials. Inspired by the growing characteristic of “Bryophyllum pinnatum”, a sacrificial co-sputtered Zn−...
Article
Full-text available
A controllable degradable coating on Mg alloy based on plasma electrolytic oxidation (PEO) process is reported for the first time. The reported results show that introduction of silica nanoparticles into PEO electrolytes leads to their reactive incorporation in coatings and thus influencing the degradation behavior. Dissolution of amorphous phases...
Article
Full-text available
Typically, steel is protected from corrosion by employing sacrificial anodes or coatings based on Zn, Mg, Al or Cd. However, stricter environmental regulations require new environmentally friendly alternatives to replace Cd. Traditionally, Al-based anodes have been employed to cathodically protect steel in marine applications or as ion vapour depos...
Article
Phosphate and silane containing organic self–assembled (SA) layers serve as pre–treatments on magnesium alloy sheet materials. A reliable protection was achieved in this work via application of alkyd–based coatings on the pretreated surface. The idea of adopting SA pre–treatments as functional layers at metal–polymer interface is to influence the a...
Article
Magnesium (Mg) and its alloys present great potential to be extensively applied in different applications. However, the relatively poor resistance to corrosion and wear significantly restricts their applications in practice. As one of strategies of surface treatment, micro-arc oxidation (MAO) process attracts a lot of attention, since it does not u...
Article
This paper proposes a practical implementation of robust ensemble learning models for accurate prediction of the internal corrosion rate in oil and gas pipelines. A correct assessment of the corrosion rate in fluid flowed oil and gas pipelines has a significant influence on the system's safety and the ability to control operation. The developed pre...
Article
With the aim of improving the corrosion and wear resistance of pure magnesium, La2O3 nano-particles are added into the PEO electrolyte. The influence of the particles on coating formation, morphology and performance is investigated. Results indicate that the porosity and thickness decrease remarkably after the particle incorporation which influence...
Article
Mechanisms of PEO coatings formation on AA2024 aluminum alloy in an aqueous solution, containing 3 g/L NaOH and 5 g/L Na2O∙2.9SiO2∙18H2O (base electrolyte) and with addition of 1.5 g/L CoOOH∙H2O, are studied. This addition results in a formation of black coatings. It is determined that structure, phase and elemental compositions of the coatings cor...
Article
Although Tris-HCl and HEPES are typically used pH buffers for in vitro studies, they are recently proven to be unable to stabilize local pH at Mg interface in simulated body fluids. In this study, local pH close to physiological (7.1-7.5) was found at metal/fluid interface of pure Zn, Zn-0.8 wt.%Ca and Zn-0.8 wt.%Mg alloys in Tris-HCl or HEPES buff...
Article
A comparative analysis of the corrosion activity of bioresorbable MA8 magnesium alloy (Mg– Mn – Ce system) in a medium for cultivation of mammalian cells (minimum essential medium, MEM) and 0.83 wt. % aqueous NaCl solution was performed. The development of the corrosion process on the surface of a magnesium alloy in two media was established using...
Article
Full-text available
Lean alloy (low alloyed) is beneficial for long-term sustainable development of metal materials. Creating a nanocrystalline microstructure is a desirable approach to improve biodegradability and mechanical properties of lean biomedical Mg alloy, but it is nearly impossible to realize. In the present study, the bulk nanocrystalline Mg alloy (average...
Article
The novel hybrid phosphate pigment 6-amino hexanoic acid (6-AHA) intercalated in layered aluminum di-hydrogen tripolyphosphate (ATP-6-AHA) was successfully embedded in an alkyd coating at 5.0 wt% and applied on low carbon steel. Layered pigments used in coatings are becoming very attractive due to the improvement of the coatings barrier properties....
Article
Full-text available
The degradation behaviour of magnesium and its alloys can be tuned by small organic molecules. However, an automatic identification of effective organic additives within the vast chemical space of potential compounds needs sophisticated tools.Herein, we propose two systematic approaches of sparse feature selection for identifying molecular descript...
Article
This work reports the influence of alumina fiber reinforcement of an AZ91Nd MMC (metal matrix composite) on the PEO coating formation process in a sodium phosphate-based electrolyte. By comparison with the pure AZ91Nd, the evolution of alumina fiber during the processing and the characteristics of the resultant PEO coating were investigated. The vo...
Article
In the presented work, the possibility of direct synthesis of LDH (layered double hydroxide) on the AZ91 surface in the presence of a chelating agent (diethylenetriaminepentaacetic acid - DTPA) is reported. Conversion layer of LDH nanocontainers were formed under ambient pressure conditions without carbonate addition in the electrolyte. The obtaine...
Article
This study aims to examine the effect of clay micro particles addition on the microstructure, wear and corrosion behavior of PEO coatings on AM 50 magnesium alloy. PEO coatings were prepared using an aluminate-based electrolyte with and without the presence of 5 g/L clay particles. The structure and composition of the coatings were evaluated using...
Article
Low interfacial pH (7.5-8.0) and corrosion rate were found for several Mg alloys (CP-Mg, UHP-Mg, Mg-0.15 wt.%Ca, Mg-4wt.%Ag) in Ca²⁺-containing Hanks’ Balanced Salt Solution (HBSS, pHinitialbulk=7.4) at 37 °C under hydrodynamic condition. Low interfacial pH and corrosion rate originated from the facilitated formation of the protective calcium-phosp...
Article
Full-text available
A new corrosion inhibitor called ATP-6-AHA was elaborated, and its inhibition action on S235 low carbon steel in 3.5% sodium chloride (NaCl) was investigated using gravimetry, potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS). The release of ecofriendly 6-aminohexanoic acid (6-AHA) from its established aluminum tri...
Article
In this work, the formation behavior of PEO coatings on polymorph Ti6Al4V alloy with two different lattice structures (hexagonal close packed α-Ti and cubic body centered β-Ti phases) was studied, using two galvanostatically controlled processes. The phase formation as a function of treatment time was studied ex-situ locally on the two Ti phases by...
Article
Corrosion protection and surface properties of Magnesium (Mg) containing 51ppm Fe (HP-Mg) and 341 ppm Fe (CP-Mg) were assessed by EIS, AFM/SKPFM, and photoluminescence spectroscopy in NaCl solutions with/without fumarate (Fum), 2,5-pyridinedicarboxylate (PDCA) and salicylate (Sal) carboxylates. The PDCA was effective in corrosion inhibition of HP-M...
Article
Adhesively-bonded titanium components enable new design concepts in lightweight engineering but often lack long-term joint durability and endurance. Major challenges are related to the fact that the titanium/adhesive interface is susceptible to environmental ageing which leads to interfacial deadhesion. In the present work, the issue is addressed f...
Article
Tribo-electrochemical impedance spectroscopy (Tribo-EIS) measurements of pure Mg were performed to identify the origin of two time constants during standard EIS measurements in NaCl solution. The influence of abrasion introduced by tribometer on EIS spectra was investigated under different rotation speeds. Further quantitative analyses of abrasion...
Article
In this work, plasma electrolytic oxidation (PEO) coatings were produced on magnesium alloy AZ31 in aluminate, silicate and phosphate- based electrolytes, and followed by hydrothermal treatments in order to synthesis layered double hydroxides (LDHs) based nanocontainers. LDHs synthesis was done in three different growth solutions (deionized water,...
Article
Full-text available
The development of PEO surface treatments for Nb (niobium) provides a possibility to produce functionalized coatings with a combination of new compositions and phases. In the frame of this work, PEO coatings on pure Nb are produced in three electrolytes containing aluminate, phosphate and silicate. Furthermore, the influence of the electrolyte comp...
Article
In this work, 2,6-dihydroxytbenzoate (2,6-DHB) is evaluated as an efficient electrolyte additive for aqueous Mg-air batteries based on diverse metallic Mg anodes. EIS measurements amid intermittent discharge and real-time hydrogen evolution measurements during discharge were applied to clarify the effective mechanism. The dependence of working mech...
Article
In-situ incorporation of layered double hydroxides (LDH) nanocontainers into plasma electrolytic oxidation (PEO) coatings on AZ91 Mg alloy has been achieved in the present study. Fumarate was selected as Mg corrosion inhibitor for exchange and intercalation into the nanocontainers, which were subsequently incorporated into the coating. It was found...
Article
Aqueous Mg batteries are promising energy storage and conversion systems to cope with the increasing demand for green, renewable and sustainable energy. Realization of high energy density and long endurance system is significant for fully delivering the huge potential of aqueous Mg batteries, which has drawn increasing attention and investigations...
Article
Besides their noteworthy tribological and corrosion protection properties, Plasma Electrolytic Oxidation (PEO) coatings feature a porous microstructure that is able to host corrosion inhibitors. This study reveals that although 2,5pyridindicarboxylate (2,5PDC) shows a remarkable corrosion inhibition effect for bare AZ21 Mg alloy, it can extensively...
Article
Magnesium (Mg) alloys are attractive biodegradable implant materials. The degradation products on Mg alloys play a critical role in the stability of the interface between implant and surrounding tissue. In the present study, the effects of dynamic deformation on the interface layer of biomedical Mg-1Zn alloy were investigated using the constant ext...
Poster
Full-text available
Degradation and damage of a material caused by the influence of adverse environments has a significant impact on the lifetime of products and infrastructures. Hence, reducing the impact of corrosion and the development of effective protection measures is an important step in saving costs and burden on natural resources. Corrosion is a multi physica...
Article
The preparation and properties of zeolite-containing oxide coatings obtained by plasma electrolytic oxidation are investigated and discussed. Pure and Ce-exchanged natural (clinoptilolite) and synthetic (13X) zeolites are immobilized on aluminum support from silicate-based electrolyte. Obtained coatings are characterized with respect to their morph...
Article
Full-text available
Sodium salts of mono- and di- carboxylic acids (glycolic, fumaric and benzoic acid) were studied as corrosion inhibitors for AM50 alloy in pH neutral aqueous NaCl environment. Hydrogen evolution, electrochemical and surface characterization techniques were employed to reveal their corrosion inhibition mechanism, whilst the molecular features of inh...
Article
Full-text available
MgCa and MgGd series of alloys are often reported as promising candidates for biomedical applications. In the present study, cytotoxicity and corrosion behavior of Mg1Ca and Mg10Gd alloys in different electrolytes (NaCl, PBS, MEM) have been investigated in order to make a direct comparison and understand the mechanisms behind their performance. Pot...
Article
A composite calcium phosphate (CaPh) coating containing calcium hydrogen phosphate dihydrate (DCPD) and hydroxyapatite (HA) is fabricated on plasma electrolytic oxidized (PEO) magnesium via electro-assisted deposition. During immersion in simulated body fluid, the soluble DCPD stimulates the precipitation of HA and remains the degradability of the...
Article
Full-text available
Although certified magnesium-based implants are launched some years ago, the not well-defined Mg degradation mechanism under physiological conditions makes it difficult to standardize its use as a degradable biomaterial for a wide range of implant applications. Among other variables influencing the Mg degradation mechanism, monitoring the pH in the...
Article
Full-text available
Research on Fe-based biodegradable alloys for implant applications has increased considerably over the past decade. However, there is limited information on the influence of testing electrolytes on corrosion product formation and general corrosion progress. In this work, the effect of Hanks' Balanced Salt Solution (HBSS) with or without Ca 2+ on th...
Article
Magnesium is very light metal which possesses many useful properties, such as a high strength to weight ratio and good electrical and thermal conductivity. Magnesium and its alloys can be used in implant surgery as biodegradable materials. Taking into account the rapid degradation process of Mg alloys in chloride-containing solutions and the very c...
Article
In order to study the substrate lattice structure (Li addition) on the growth of plasma electrolytic oxidation (PEO) coatings, MgLi alloy (11.36 wt.% of Li, cubic) and pure Mg (hexagonal) were treated under a pulsed direct PEO mode in a phosphate electrolyte for different periods of time. The results revealed that the presence of Li and Li-rich pha...
Article
Ureteral stents are a relatively new potential application for biodegradable Mg alloys. In this study, the corrosion behavior of Mg-1Zn wires and pure Mg wires in artificial urine solution (AUS) is investigated. It is found that AUS possesses a strong pH buffer effect. Hydrogen evolution measurement cannot be used for Mg corrosion test in this AUS...
Article
In this work metallic pins made of Mg5Gd alloy were coated with magnetron sputtered PVD Mg5Gd layers. Immersion tests in Hank’s balanced salt solution (HBSS) were performed. The PVD coating drastically reduced the corrosion rate of the Mg5Gd pin. The corrosion mechanism of the coating was studied in model electrochemical measurements by Scanning Vi...
Article
Full-text available
Commercially pure Fe, Fe35Mn, and (Fe35Mn)5Ag alloys were prepared by uniaxial pressing of the mixture of individual powders, followed by sintering. The influence of the alloying elements Mn and Ag on the corrosion behaviour of these Fe-based alloys was investigated in Hanks’ Balanced Salt Solution (HBSS). Furthermore, the role of the components in...
Article
Full-text available
In this study, MgAl-V2O7⁴⁻ LDHs/(poly(ethyleneimine)(PEI)/MXene)n composite films were synthesized via (i) in-situ hydrothermal growth of Mg-Al layered double hydroxides (LDHs) on AZ31 alloy followed by vanadate intercalation reactions, and (ii) the as-prepared MgAl-V2O7⁴⁻ LDHs film was covered by layer-by-layer assembly using (PEI/MXene)n, where n...
Article
Electrochemical impedance spectroscopy measurements were performed to study the evolution of surface condition, which related to the high frequency time constant of Mg, in 0.05 M NaCl solution at three different pH. Based on the assumption that the high frequency time constant originates solely from the surface film, the thickness of MgO film was c...
Article
Full-text available
Plasma electrolytic oxidation (PEO) with in‐situ anatase particle addition was applied to functionalize the surface of AA2024 alloy. A base potassium titanium‐oxide oxalate dihydrate aqueous electrolyte was used with up to 30 g/L anatase particle addition. The coatings’ morphology and phase composition as a function of the anatase concentration in...
Article
In order to form calcium phosphate (CaPh) coatings in the changing chemical environment, a drop wise addition procedure is performed during electro-deposition process. Two kind of electrolytes of KH2PO4 and K2HPO4, are added into Ca(NO3)2 solution respectively where plasma electrolytic oxidized (PEO) magnesium is placed. Results indicate that the p...
Article
A proper assignment of time constants is important for the correct interpretation of the electrochemical impedance spectra of coated substrates. In this work several model aluminium samples with different anodic oxide thicknesses were prepared and characterised. The aluminium samples were coated by a hybrid sol-gel formulation and studied by electr...
Article
Full-text available
In this work the ZnAl-NO2 LDH (layered double hydroxide) is investigated as a possible additive for mitigating the chloride-induced corrosion of steel in reinforced concrete. The investigation focused on the stability and chloride binding capacity of this LDH in the pH range typical of cementitious materials. Until pH = 12.5 the material was stable...
Article
Recently the successful formation of PEO coatings on zinc alloy in a phosphate aluminate electrolyte was shown. The produced composite coatings contain various mixtures of ZnO and ZnAl2O4. In frame of the current study, the properties of the formed coatings including adhesion/cohesion, wear, corrosion and photocatalytic activity were analysed to id...
Article
Indium chloride (InCl3) as an electrolyte additive for primary aqueous Mg batteries is evaluated in this work in terms of its effect on discharge potential, self-corrosion rate and utilization efficiency of a newly developed Mg-0.15Ca anode. InCl3 addition to aqueous electrolyte leads to a more negative discharge potential but the enhancement weake...
Article
Corrosion-induced surface deterioration as well as mechanical properties degradation of AA2198-T351 were experimentally investigated and compared against AA2024-T3. Pre-corroded tensile and fatigue specimens were mechanically tested. Several degradation mechanisms were detected for different exposure times: a) pitting formation for short exposure t...
Conference Paper
Multi-physics and multiscale modelling frameworks, especially for the computer based analysis of surface damage and corrosion, requires not only robust computational tools but also an efficient data-centric architecture for handling information exchange at different modelling scales. The issue to exchange data provided by different computational so...
Article
The composite calcium-phosphate coating on MA8 Mg alloy consisting of the inorganic porous basis sealed with polymer is suggested. To control the alloy resorption kinetics, the coating obtained by plasma electrolytic oxidation is modified with superdispersed polytetrafluoroethylene using electrophoretic deposition (EPD). Protective properties and m...
Article
Full-text available
Small organic molecules that modulate the degradation behavior of Mg constitute benign and useful materials to modify the service environment of light metal materials for specific applications. The vast chemical space of potentially effective compounds can be explored by machine learning-based quantitative structure-property relationship models, ac...
Chapter
Smart protection of metallic materials is currently a hot topic in mitigation of corrosion of metallic structures, and promises reduction in both economic and environmental costs. Degradation of carbon-reinforced composite materials and CFRP-Metal joints is a serious issue in high-performance weight-optimized structures employed in the aeronautical...
Article
Full-text available
Comprehending the corrosion mechanism of magnesium is of major interest in diverse fields. Typically, hydrogen evolution reaction is considered as the only cathodic reaction during Mg corrosion. However, recent works demonstrate importance of considering oxygen reduction reaction (ORR) as a second cathodic process at specific conditions. With oxyge...
Article
The plasma electrolytic oxidation (PEO) coatings were produced on D16T Al alloy in the aluminate and silicate electrolyte with and without graphene. The phase composition, microstructure and elemental distribution of the coatings were tested by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX...
Article
Full-text available
In the present work, a flash-PEO coating is developed on AZ31B alloy in a combination of silicate, phosphate, and fluoride based electrolyte in order to offer a green alternative to chromate conversion coatings. Multilevel active protection is achieved through synerge