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    Wyświetlanie 1-3 z 3
    Tytuł:
    Determination of twist drill bits wear: the effect of the composition and structure of the steels
    Autorzy:
    Prałat, Karol
    Krupińska, Andżelika
    Ochowiak, Marek
    Włodarczak, Sylwia
    Matuszak, Magdalena
    Ciemnicka, Justyna
    Koper, Artur
    Wójcicka, Karolina
    Powiązania:
    https://bibliotekanauki.pl/articles/2174822.pdf
    Data publikacji:
    2022
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    drilling
    high-speed tool steel
    EDS
    tool wear
    microstructure
    Opis:
    The aim of the study was to relate the infl uence of the chemical composition, structure, and basic properties as hardness of the tested drill bits on resistance to their wear. The chemical composition of the drill bit was investigated using the electric excitation emission spectrometry method and EDS microanalysis. Metallographic specimens were prepared and observed to determine the structure of each tool. Hardness tests were carried out on the shank and the working part of the tools. Material wear tests were carried out on the basis of measuring the wear of the drill bit flank. It has been shown that the appropriate selection of the chemical composition and heat treatment has a signifi cant impact on the wear resistance of cutting tools, which directly translates into their quality.
    Źródło:
    Polish Journal of Chemical Technology; 2022, 24, 3; 8--13
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inhibitive tendency of zinc gluconate for aluminium alloy in sulphuric acid solution
    Autorzy:
    Sanni, O.
    Loto, C. A.
    Popoola, A. P. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/780091.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    aluminium
    zinc gluconate
    inhibition
    weight loss
    potentiodynamic polarization
    SEM/EDS
    Opis:
    The corrosion inhibition of aluminium alloy in 0.5M H2SO4 solution in the presence of zinc gluconate at 301 K was investigated using weight loss and an electrochemical method. Surface analysis of the aluminium alloy sample was reviewed by a high resolution scanning electron microscope equipped with energy dispersive spectroscopy (HRSEM/ EDS). The readings were taken after 48 h for 28 days while the concentration of the inhibitor was varied from 0.5 to 2.0% g/v with an interval of 0.5. The result of the investigation shows that zinc gluconate has a good corrosion inhibition effect for aluminium alloy in 0.5 molar sulphuric acid solution and its efficiency attains more than 67% at 1.5% g/v concentration of zinc gluconate at 301 K. The potentiodynamic polarization data showed that zinc gluconate acts as a mixed type corrosion inhibitor. The adsorption of zinc gluconate on aluminium alloy has been found to obey Freundlich adsorption isotherm at all the concentration of zinc gluconate studied. The results obtained from different methods are in good agreement.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 4; 60-64
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the TOF-SIMS and SEM-EDS methods to assess the influence of dusting from a phosphate waste deposal place based on hair analysis
    Autorzy:
    Szynkowska, M.I.
    Leśniewska, E.
    Pawlaczyk, A.
    Rogowski, J.
    Paryjczak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/778695.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fosfogips
    analiza powierzchni
    włos
    SEM-EDS
    ToF-SIMS
    phosphogypsum
    surface analysis
    hair
    TOF-SIMS
    Opis:
    In this work, scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) and the time-of-flight secondary ion mass spectrometry (TOF-SIMS) were used to study the particles present on the hair surface of the inhabitants of Wislinka (people environmentally exposed due to the closeness of a dump) in order to obtain the information about the possible influence of dusting from a phosphate waste deposal place. Additionally, the morphology and the composition of fresh phosphogypsum were analyzed. Waste phosphogypsum is formed in the process of a wet phosphoric acid production and there is still a problem with its storage. A thorough understanding of the composition and chemistry of phosphogypsum seems to be necessary to evaluate its environmental impact comprehensively. The results obtained from these two techniques turned out to be complementary and revealed the information expected.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 4; 85-90
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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