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Unraveling the effects of surface preparation on the pitting corrosion resistance of austenitic stainless steel

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The effects of surface preparation on the corrosion resistance of AISI 316L austenitic stainless steel were studied using the cyclic potentiodynamic polarization method. Grinding, mechanical polishing, and electropolishing were considered as the surface modifier methods. Regarding the surface roughness parameters, besides the conventional height parameter (Ra), the kurtosis (Rku) as the shape parameter was also considered to rationalize the pitting resistance for the first time. Based on the results of the Tafel extrapolation method, it was revealed that the uniform corrosion can be adequately correlated to Ra. However, the pitting resistance was found to mainly relate to the kurtosis, where by decreasing Rku (increased bluntness of topographic features), the pitting resistance enhanced. It was also found that a surface with Rku less than three (platykurtic) is resistant to pitting attack, where this surface can be obtained via electropolishing performed for an optimum time. The effect of electropolishing on the chromium content at the surface and its relation to the corrosion properties were also discussed.
Rocznik
Strony
99--108
Opis fizyczny
Bibliogr. 35 poz., rys., tab., wykr.
Twórcy
  • School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 11155‑4563, Tehran, Iran
autor
  • School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 11155‑4563, Tehran, Iran
  • School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 11155‑4563, Tehran, Iran
Bibliografia
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Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-b83c8399-c347-49d6-a415-39bcbb6f1f49
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