Electrochemical and surface insights into X12CrMoWVNbN10-1-1 steel corrosion in chloride solutions at variable pH

Pejić, Jovanka (avtor), Karpe, Blaž (avtor), Nagode, Aleš (avtor), Dojčinović, Marina (avtor), Kosec, Borut (avtor), Vlahović, Milica (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: chloride corrosion, electrochemical impedance spectroscopy, linear sweep voltammetry, passive film, pitting resistance, potentiodynamic polarization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 518-528
• Številčenje: Vol. 77, iss. 4
• PID: 20.500.12556/RUL-181763
• UDK: 669
• ISSN pri članku: 0947-5117
• DOI: 10.1002/maco.70087
• COBISS.SI-ID: 260135939
• Datum objave v RUL: 15.04.2026

Gradivo je del revije

• Naslov: Materials and corrosion
• Skrajšan naslov: Mater. corros.
• Založnik: Wiley
• ISSN: 0947-5117
• COBISS.SI-ID: 16036869

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Projekti

• Financer: MESTD - Ministry of Education, Science and Technological Development of Republic of Serbia

• Financer: Republic of Slovenia, Ministry of Higher Education, Science and Innovation