20.500.12556/RUL-177782 Corrosion mitigation of AA6082, Copper-ETP, and their galvanic couple using ▫$Ce(OAc)_{3}$▫, ▫$Na_{2}SO_{4}$▫, and 1H-BTA in chloride solution Galvanic coupling between aluminium alloy 6082 and copper (Cu-ETP) accelerates corrosion through anodic dissolution of aluminium, posing serious durability challenges for mixed-metal structures. This study investigates the inhibition mechanisms of cerium acetate (▫$Ce(OAc)_{3}$▫), sodium sulphate (▫$Na_{2}SO_{4}$▫), and 1H-benzotriazole (1H-BTA), individually and in combination, on AA6082, Cu-ETP, and their galvanic couple in 0.1 M NaCl solution. The inhibitors’ performance was evaluated using potentiodynamic polarisation, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and salt spray testing. ▫$Ce(OAc)_{3}$▫ and ▫$Na_{2}SO_{4}$▫ promoted the formation of cerium oxide films on AA6082, while 1H-BTA adsorbed on Cu-ETP, forming a compact film that suppressed anodic dissolution and cathodic oxygen reduction. The combined inhibitor system, compared to the uninhibited system, significantly reduced galvanic corrosion current by a factor ∼4.5 (▫$2.6μA/cm^{2}$▫ vs. ▫$11.8μA/cm^{2}$▫) and enhanced pitting resistance by shifting the pitting potential of AA6082 to more noble values. Furthermore, EIS results confirmed the improved stability of the passive films on Cu-ETP after 72 h of immersion in inhibitor mixture (▫$∣Z_{0.01 Hz}$▫∣ = 4.4 ▫$MΩcm^{2}$▫). SEM and salt spray results showed reduced corrosion and uniform protective deposits, with treated AA6082 retaining over 92% of its original volume after 42 days of exposure. This work demonstrates a synergistic inhibition strategy combining cerium salts and organic molecules to protect aluminium–copper assemblies in aggressive environments. AA6082 Cu-ETP corrosion inhibition cerium acetate benzotriazole galvanic coupling zaviranje korozije cerijev acetat benzotriazol galvansko povezovanje true false true Angleški jezik Slovenski jezik Članek v reviji 2026-01-07 11:29:29 2026-01-07 11:29:37 2026-01-08 04:27:48 0000-00-00 00:00:00 2026 0 0 Str. 2422-2436 Vol. 40 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.193:621.357 2238-7854 10.1016/j.jmrt.2025.12.290 263725571 Trdan..._Corrosion_mitigation....pdf Trdan..._Corrosion_mitigation....pdf 1 CE45CA5B8CC90D0F6E1F8A69F7359F40 a7e2744e98fca04e2bd575d45519a1a080e1f5f25a0116c32d5d5bd00118b55c 539295b8-ebb6-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225094 https://www.sciencedirect.com/science/article/pii/S2238785425033587 1 c4161fcd-ebb3-11f0-bf92-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=225093 Fakulteta za strojništvo 0 0 0