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    Wyświetlanie 1-10 z 10
    Tytuł:
    Influence of temperature on corrosion resistance of austenitic stainless steel in cl¯ containing solutions
    Autorzy:
    Zatkalíková, Viera
    Markovičová, Lenka
    Powiązania:
    https://bibliotekanauki.pl/articles/111992.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    pitting corrosion
    temperature
    cyclic potentiodynamic test
    immersion test
    pitting potential
    korozja wżerowa
    temperatura
    test potencjodynamiczny
    Opis:
    Temperature is considered a complicated external factor of the susceptibility of stainless steels to the pitting. This paper deals with the corrosion behaviour of AISI 316Ti stainless steel in temperature range 22 - 80°C in aggressive chloride environments (3 and 5% FeCl3 solutions). The corrosion resistance of tested steel is evaluated on the base of results of exposure immersion tests and cyclic potentiodynamic tests. According to the obtained results the resistance of AISI 316Ti to the pitting is markedly affected by temperature changes in the range 22 - 80°C. Intensity of corrosion attack increases with the rise of Cl¯ concentration. Gentle changes of temperature and Cl¯ concentration cause significant differences in character of local damage. The appearance of pitted surfaces changes with the rise of the temperature (a density of pitting increases, a size of pits decreases). The strongest change in appearance is observed between 40 and 50ºC.
    Źródło:
    Production Engineering Archives; 2019, 25; 43-46
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composites with rubber matrix and ferrimagnetic filling
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Powiązania:
    https://bibliotekanauki.pl/articles/88718.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    composites
    rubber matrix
    filling
    mechanical properties
    microstructure
    materiał kompozytowy
    kompozyt
    matryca
    wypełniacz
    właściwości mechaniczne
    mikrostruktura
    Opis:
    A composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. Modern composite materials are usually optimized to achieve a particular balance of properties for a given range of applications. Composites are commonly classified at two distinct levels. The first level of classification is usually made with respect to the matrix constituent. The major composite classes include organic – matrix composites (OMC's), metal – matrix composites (MMC's), and ceramic – matrix composites (CMC's). The OMC's is generally assumed to include two classes of composites: polymer – matrix composites (PMC's) and carbon – matrix composites (Peters, 1998). The composite material used in the work belongs to the PMC's and the composite is formed by the polymer matrix – rubber (sidewall mixture). As filler was used hard-magnetic strontium ferrite. Composite samples were prepared with different filler content (20%, 30%, 40%, 50%). Testing of polymer composites included: tensile test, elongation at break, hardness test and study of morphology.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 776-781
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local corrosion of AISI 304 stainless steel in acidic chloride solution
    Autorzy:
    Zatkalíková, Viera
    Markovičová, Lenka
    Hanusová, Patrícia
    Powiązania:
    https://bibliotekanauki.pl/articles/104041.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    austenitic stainless steel
    pitting corrosion
    exposure test
    cyclic potentiodynamic test
    direction of rolling
    austenityczna stal nierdzewna
    korozja wżerowa
    próba narażenia
    cykliczna próba potencjodynamiczna
    kierunek walcowania
    Opis:
    AISI 304 austenitic stainless steel is recommended and used for various applications in industry, architecture and medicine. Presence of halides in environment evokes a possibility of the local corrosion which limits seriously exploitation of this material in aggressive conditions. The presented paper is focused on the pitting corrosion resistance (“as received” steel surface) in 1M chloride solution (pH=1.2) at a common (20 °C) and an elevated (50 °C) ambient temperatures. 24-hours exposure immersion test (ASTM G48) and cyclic potentiodynamic test (ASTM G61) are used as the independent test methods. The exposure immersion test is carried out with cross-rolled and longitudinally rolled specimens and the effect of direction of rolling on the resistance to pitting is studied.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 268-275
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion behavior of austenitic stainless steels in road salt solutions
    Autorzy:
    Zatkalíková, Viera
    Markovičová, Lenka
    Valčuhová, Daniela
    Powiązania:
    https://bibliotekanauki.pl/articles/24202546.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    road salt solution
    stainless steel
    pitting corrosion
    corrosion resistance
    potentiodynamic polarization
    pitting potential
    Opis:
    Stainless steels are widely used for various automotive components. Some of them (e.g., parts of the exhaust system) are exposed to the external environment. In winter conditions, they are affected by chloride containing road salt solutions, which can lead to the local corrosion of these stainless steel parts. The presented paper is focused on the pitting corrosion resistance of two austenitic stainless steels (AISI 304 and AISI 316L) in 5 wt% and 10 wt% road salt solutions. The evaluation and comparison are based on the potentiodynamic polarization test method carried out at the temperature of 20 ± 2°C. The pitting potentials were determined from the polarization curves. Local corrosion damage of exposed surfaces caused by potentiodynamic polarization in the used solutions was observed by optical microscope. Experimental results confirmed a worse pitting corrosion resistance case, especially for AISI 304 stainless steel in 10 wt% road salt solution.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 71 (143); 72--77
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon fiber polymer composites
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Hanusová, Patrícia
    Powiązania:
    https://bibliotekanauki.pl/articles/104047.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    carbon fibers
    polymer matrix
    composites
    mechanical properties
    włókna węglowe
    matryca polimerowa
    kompozyty
    właściwości mechaniczne
    Opis:
    Carbon fiber reinforced composite materials offer greater rigidity and strength than any other composites, but are much more expensive than e.g. glass fiber reinforced composite materials. Continuous fibers in polyester give the best properties. The fibers carry mechanical loads, the matrix transfers the loads to the fibers, is ductile and tough, protect the fibers from handling and environmental damage. The working temperature and the processing conditions of the composite depend on the matrix material. Polyesters are the most commonly used matrices because they offer good properties at relatively low cost. The strength of the composite increases along with the fiber-matrix ratio and the fiber orientation parallel to the load direction. The longer the fibers, the more effective the load transfer is. Increasing the thickness of the laminate leads to a reduction in the strength of the composite and the modulus of strength, since the likelihood of the presence of defects increases. The aim of this research is to analyze the change in the mechanical properties of the polymer composite. The polymer composite consists of carbon fibers and epoxy resin. The change in compressive strength in the longitudinal and transverse directions of the fiber orientation was evaluated. At the same time, the influence of the wet environment on the change of mechanical properties of the composite was evaluated.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 276-280
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion resistance of SiMo- and SiCu-types of nodular cast iron in NaCl solution
    Autorzy:
    Vaško, Alan
    Zatkalíková, Viera
    Kaňa, Václav
    Powiązania:
    https://bibliotekanauki.pl/articles/88510.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    nodular cast iron
    corrosion
    exposure immersion test
    NaCl solution
    żeliwo sferoidalne
    korozja
    roztwór NaCl
    właściwości mechaniczne
    właściwości zmęczeniowe
    Opis:
    Nodular cast irons are used in a wide range of industrial applications, especially in the automotive industry. SiMo-type of nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines; SiCu-type of nodular cast iron is used in various components of tribotechnical units. These automotive components often work in a corrosive environment. Therefore, the aim of this paper is to compare the corrosion resistance of two types of the nodular cast irons (SiMo-type and SiCu-type). Corrosion resistance was determined by the exposure immersion test at ambient temperature. Specimens of both types of nodular cast iron were immersed in 3.5 % NaCl solution (to simulate sea water) and gradually removed from the solution after 1, 2, 4 and 8 weeks. Subsequently, the weight loss (g) and the average corrosion rate (g m-2 day-1) were calculated. Experimental results show that nodular cast iron alloyed by Si and Mo has higher corrosion resistance than the nodular cast iron alloyed with Si and Cu. Moreover, the mechanical properties (evaluated by tensile test, impact bending test and hardness test) and fatigue properties of both types of nodular cast iron has been compared in the paper.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2020, 2, 1; 191-198
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion behavior of Cr-Ni-Mo stainless steel in chemically modified chloride solution
    Autorzy:
    Zatkalíková, Viera
    Markovičová, Lenka
    Štrbák, Milan
    Powiązania:
    https://bibliotekanauki.pl/articles/34670831.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    austenitic stainless steel
    pitting corrosion resistance
    inorganic inhibitor
    stal austenityczna nierdzewna
    odporność na korozję wżerową
    inhibitor nieorganiczny
    Opis:
    Cr-Ni-Mo stainless steels are susceptible to the pitting in aggressive chloride environments. One of the possible ways for the influence of their corrosion behavior is the use of inhibitors as the chemical modification of the environment. The resistance of AISI 316Ti stainless steel to the pitting with/without the inorganic inhibitor was tested by two independent corrosion tests: 24-hours exposure immersion and potentiodynamic polarization test. Both tests were carried out in 1M chloride acidic solution with/without 0.1M molybdate inhibitor at room temperature. Results of immersion tests were evaluated by the corrosion rates calculated from corrosion losses and by the morphology of the pitting. Potentiodynamic polarization curves were evaluated by the pitting potentials.
    Źródło:
    Quality Production Improvement - QPI; 2021, 3, 1; 299-304
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of filler content on the viscosity of polymer composites
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Kojnoková, Tatiana
    Powiązania:
    https://bibliotekanauki.pl/articles/34670835.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    ferrite filler
    polymer matrix
    composites
    polyethylene
    rheology
    wypełniacz ferrytowy
    matryca polimerowa
    kompozyty
    polietylen
    reologia
    Opis:
    Currently, research on materials containing magnetic magnetic particles give opportunity to the prepare and study of composites with interesting magnetic features. One possibility for producing such materials is the use of fillers with magnetic properties. The final properties of such composites depend mainly on characteristic polymer matrix. However, the addition of magnetic materials arose use of new technologies. Such builders include the magnetic ferrites. Metal hexaferrites represent well researched group of magnetic materials (Mallick, 1993). Their high values of magnetocrystalline anisotropy and saturation magnetization enable widespread application of these materials as permanent magnets. Low price and excellent chemical stability with suitable magnetic characteristics classified ferrites to one of the most important magnetic materials (Rigbi, 1988). The experimental material used was a composite formed by combining a polymer matrix (linear polyethylene HDPE), and the hard-magnetic strontium ferrite labeled FD 160S as a filler. Composites with different filler contents were prepared from the starting materials. The dependence of viscosity on the content of ferrite filler was determined by rheological measurements.
    Źródło:
    Quality Production Improvement - QPI; 2021, 3, 1; 293-298
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion properties of 1.4512 ferritic and 1.4404 austenitic steels for the automotive industry
    Autorzy:
    Zatkalíková, Viera
    Markovičová, Lenka
    Wróbel-Knysak, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/88716.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    corrosion
    ferritic stainless steel
    austenitic stainless steel
    cyclic potentiodynamic test
    exposure test
    stal ferrytyczna odporna na korozję
    stal austenityczna
    test potencjodynamiczny
    test ekspozycji
    Opis:
    Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades (mostly ferritic and austenitic, but also martensitic and duplex) and protective coatings are currently used for exhaust system elements to increase their aestetics and corrosion resistance. This article focuses on evaluation and comparison of the common corrosion properties of two stainless steels with different microstructures (ferritic and austenitic) used for exhaust system components at the low ambient temperature (35 °C). An aggressive acidic corrosion solution for electrochemical cyclic potentiodynamic tests (ASTM G61) was chosen to simulate partly inner (condensate) and also external environment (reaction of exhaust gases with water, chlorides in solution after winter road maintenance). Exposure tests of the pitting corrosion resistance were performed according to ASTM G48 standard method.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 745-752
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Verification of the probability of elastomers degradation in natural environments
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Sovík, Jan
    Kojnoková, Tatiana
    Powiązania:
    https://bibliotekanauki.pl/articles/26075898.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    guma
    degradacja
    własności mechaniczne
    środowisko
    odpady
    rubber
    degradation
    mechanical properties
    environment
    waste
    Opis:
    A wide range of elastomers allows to manufacture products that meet high demands of consumers. They are prepared from a mixture of several rubbers, rubber chemicals, additives and reinforcing materials (fibres), which allows you to obtain the desired properties of the products. The other components of rubber compounds are fillers, carbon blacks and plasticizers. Rubber chemicals supplement the mixture in small quantities of related products, which affect vulcanization and regulate their properties, so they have an irreplaceable role in the preparation of rubber products. The aim of experimental part is to assess the properties of the degradation environment on samples of rubber composites to change their properties. The result of the performed mechanical tests to evaluate and compare the obtained values of mechanical properties of rubber compounds and to predict the possibility of biological degradation of the tested material.
    Źródło:
    Production Engineering Archives; 2022, 28, 3; 279--282
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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