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    Wyświetlanie 1-4 z 4
    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:
    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 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
      Wyświetlanie 1-4 z 4

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