20.500.12556/RUL-181763 Electrochemical and surface insights into X12CrMoWVNbN10-1-1 steel corrosion in chloride solutions at variable pH The corrosion behavior of X12CrMoWVNbN10‐1‐1 steel was investigated in 0.1 M NaCl solutions of different pH values (2.9, 6.5, and 10.3) using electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and potentiodynamic polarization (PDP). A pronounced pH dependence was observed, with the highest corrosion rate and lowest polarization resistance in acidic medium. Neutral and alkaline environments promoted passive film formation, with the alkaline solution providing superior protection against general and pitting corrosion. The enhanced passivation is attributed to the stabilizing role of hydroxide ions. Surface morphology by optical microscopy and SEM confirmed these trends, revealing severe degradation in acid and compact surfaces in neutral and alkaline media. Quantitative comparison with reference steels (P91 and 316 L) confirms an order‐of‐magnitude improvement in corrosion resistance, emphasizing the practical relevance of X12CrMoWVNbN10‐1‐1 for chloride‐containing environments. The results highlight its strong corrosion stability under variable‐pH exposure. chloride corrosion electrochemical impedance spectroscopy linear sweep voltammetry passive film pitting resistance potentiodynamic polarization true false true Angleški jezik Ni določen Članek v reviji 2026-04-15 12:25:09 2026-04-15 12:25:11 2026-04-16 04:45:30 0000-00-00 00:00:00 2026 0 0 Str. 518-528 iss. 4 Vol. 77 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 0947-5117 10.1002/maco.70087 260135939 Materials___Corrosion_-_2025_-_Pejic_-_Electrochemical_and_Surface_Insights_Into_X12CrMoWVNbN10‐1‐1_Steel_Corrosion_in.pdf Materials___Corrosion_-_2025_-_Pejic_-_Electrochemical_and_Surface_Insights_Into_X12CrMoWVNbN10‐1‐1_Steel_Corrosion_in.pdf 1 689A7B8335A406A0CF6E9E2AFD59FD27 d30190e13539aff17799b17e0af1d61a2331654878210e3a5ec9a192ed67ec08 a33d139e-38b5-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=232480 https://onlinelibrary.wiley.com/doi/10.1002/maco.70087 0 78cfdce0-38b5-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=232479 Naravoslovnotehniška fakulteta 0 0 0