20.500.12556/DiRROS-16882 Depassivation and repassivation of stainless steels by stepwise pH change Immersion tests with different stainless steels have been performed, while the pH was stepwise decreased and then increased again. During 8.5-day exposure, the depassivation and repassivation pH values as a function of pitting resistance equivalent number were determined. There is always a gap between both pH values (depassivation and repassivation), indicating that for every steel, there are conditions where an existing passive layer can be maintained but cannot be rebuilt after depassivation. In such environments, the passive layer is thicker, consisting mainly of molybdenum and iron rich oxides, while chromium is dissolved. Usually, depending on conditions, the passive layer is more chromium-rich, especially the inner layer. This is relevant, for example, for acidizing jobs in oil and gas industry, proving that repassivation after acidizing will happen promptly, when the pH is increased again. stress corrosion cracking surface finish impact tapered tensile specimen autoclave accelerated testing light water nuclear reactor critical threshold stress napetostno korozijsko pokanje vpliv površinske obdelave trapezast natezni vzorec avtoklav lahkovodni jedrski reaktor mejna napetost true false false Wiley-VCH Angleški jezik Slovenski jezik © 2020 The Authors. Materials and Corrosion published by Wiley-VCH GmbH Neznano 2023-08-30 10:34:24 2023-08-30 10:43:01 2023-08-31 03:35:47 0000-00-00 00:00:00 2020 0 0 421 - 433 3 72 March 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-10-02 620.1/.2 0947-5117 10.1002/maco.202011985 31243779 https://onlinelibrary.wiley.com/doi/10.1002/maco.202011985 1 42082e8e-46ff-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22942 RAZ_Mujanovic_Emir_2020.pdf RAZ_Mujanovic_Emir_2020.pdf 1 DC19384AFA516C2B270CA30E5834F19E 6404b9b4aa26536e5a93b467cbbd77481a60fe7c60e0195b6307ebde0e4538a8 6f2f7e03-4700-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22943 Zavod za gradbeništvo Slovenije 0 0 0