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    Wyświetlanie 1-3 z 3
    Tytuł:
    The studies of corrosion resistance of AISI 316Ti SS in Ringer’s solution after electropolishing and passivation in nitric acid
    Autorzy:
    Rokosz, Krzysztof
    Hryniewicz, Tadeusz
    Solecki, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1177846.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    AISI 316Ti/EN 1.4571
    austenitic stainless steel
    electropolishing
    passivation
    pitting corrosion
    potentiodynamic corrosion measurements
    Opis:
    In present work, the continuation of general and pitting corrosion analysis of austenitic AISI 316Ti (EN 1.4571) stainless steel in Ringer's solution, is presented. The corrosion was studied by using the ATLAS 98 potentiostat with platinum EPT-101 and calomel reference EK-101P electrodes. The three types of specimens, i.e. as received (without any pretreatment), after abrasive mechanical polishing (MP), and after electrochemical polishing (EP), were used. The best pitting corrosion resistance was recorded for electropolished and passivated (in 20% vol. HNO3 for 30 minutes) surface, i.e. the pitting potential was equal to 761 mVSCE (855.4 ± 58.5 mVSCE), while the worst one was recorded for mechanically ground samples and the pitting corrosion potential was equal to 270 mVSCE (378.8 ± 60.3 mVSCE).
    Źródło:
    World Scientific News; 2018, 98; 46-60
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative corrosion studies of 2205 duplex steel after electropolishing and passivation in Ringer’s solution
    Autorzy:
    Rokosz, Krzysztof
    Hryniewicz, Tadeusz
    Solecki, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1178066.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    electropolishing
    passivation
    pitting corrosion
    potentiodynamic corrosion measurements
    stainless steel duplex 2205
    Opis:
    In present work, the results of corrosion analysis of pitting and general corrosion of austenitic duplex 2205 (EN 1.4462) stainless steel in Ringer's solution, are presented. The corrosion rate was studied using potentiodynamic polarisation method by means of the ATLAS 98 potentiostat with POL 98 software. For these measurements the platinum EPT-101 and calomel reference EK-101P electrodes were used. For each run, the electrolytic cell made of glass was used, containing up to 500 ml of the electrolyte. The specimens used for the studies were obtained from a cold-rolled sheet of steel in three forms: as received (without any pretreatment), after abrasive polishing, and after electrochemical polishing. Some of them were passivated for 15 and 30 minutes, respectively, in 20% HNO3 by volume. The study results show clearly that the samples of duplex 2205 stainless steels after electropolishing and passivation for 15 minutes in 20% HNO3 by volume revealed the highest corrosion resistance.
    Źródło:
    World Scientific News; 2018, 95; 167-181
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Corrosion Study of Austenitic AISI 304L and 316Ti Stainless Steels in the Ammonium nitrate/Urea Solution (AUS)
    Autorzy:
    Rokosz, Krzysztof
    Hryniewicz, Tadeusz
    Trzeszczkowski, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/1182940.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ammonium nitrate/urea solution (aus)
    cold-rolled 304l and 316ti ss
    comparison
    pitting corrosion
    Opis:
    The aim of the study was to determine the corrosion behavior of two austenitic stainless steels, AISI 304L and AISI 316Ti, after cold rolling (AR) and mechanical polishing/grinding (MP), in a 32% aqueous solution of AUS (RSM®) Ammonium Nitrate/Urea Solution, used as fertilizer, and compared with the corrosion resistance results obtained in 3% aqueous solution of sodium chloride (NaCl). The studies have shown that cold rolled austenitic stainless steels (AISI 304L and AISI 316Ti) in the 32% aqueous solution of AUS have more than two times higher pitting corrosion resistance than that obtained in 3% aqueous solution of sodium chloride (NaCl). Surface scratch of the cold rolled austenitic AISI 304L stainless steel and submersion of the samples in 3% aqueous solution of sodium chloride resulted in decreasing of its pitting corrosion resistance of more than three times; on the other hand, the pitting corrosion resistance of AISI 316Ti in the same solution decreased of two times. It was found that for both stainless steels (AISI 304L and AISI 316Ti) after mechanical grinding, as simulated by the surface scratch, and submersion of the samples in 32% aqueous solution of AUS, the pitting corrosion resistance was not worsened, because of the passivation properties of AUS solution. The study results have shown that in the natural environments containing aqueous solutions of sodium chloride (NaCl), the use of austenitic stainless steel containing chromium, nickel, molybdenum and titanium (AISI 316Ti) is advised. In other environments without chlorides, such as the AUS fertilizer, the use of austenitic AISI 304L stainless steel may be considered as adequate.
    Źródło:
    World Scientific News; 2016, 49, 2; 249-271
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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