20.500.12556/DiRROS-29254 Corrosion behaviour of injection- and compression-moulded Nd–Fe–B and Sm–Fe–N magnets with different polymer binders Corrosion behaviour of injection- and compression-moulded Nd-Fe-B and Sm-Fe-N magnets with different polymer binders The corrosion behaviour and environmental durability of injection- and compression-moulded Nd–Fe–B and Sm–Fe–N magnets were investigated. For injection-moulded magnets, the effects of magnetic powder type (Nd–Fe–B and Sm–Fe–N), magnetic powder particle size (100 µm and 400 µm), and polymer binder (PPS and PA12) on corrosion resistance were studied. For compression-moulded magnets with an epoxy binder, the effects of powder type and size were examined. Corrosion resistance was investigated using potentiodynamic polarisation in electrolytes of varying pH (1.8–12.8). The Sm–Fe–N magnets exhibited slightly better corrosion resistance than the Nd–Fe–B magnets, irrespective of the polymer binder. The finer magnetic powders (100 µm) showed lower corrosion resistance due to their larger specific surface area, with a more pronounced effect in the compression-moulded magnets. The type of polymer binder had only a minor effect. The hygrothermal corrosion resistance and thermal stability were evaluated using bulk corrosion (BCT) and thermal shock tests, respectively. Surface corrosion was observed in all magnets after the BCT, with the compression-moulded magnets exhibiting a greater irreversible loss of magnetic properties. The thermal shock test caused a temporary reduction in magnetic properties, with recovery after remagnetisation, demonstrating the good thermal stability of both magnet types. magnetic powder injection moulding compression moulding polymer-bonded magnets bulk-corrosion test thermal shock test polymer binders magnetni prah injekcijsko brizganje tlačno vlivanje polimerna veziva true false true MDPI Švica Angleški jezik Slovenski jezik © 2026 by the authors. Neznano 2026-05-04 14:38:26 2026-05-04 14:38:26 2026-05-05 03:45:45 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 4. 5. 2026; str. 1-21 iss. 9, [article no.] 1123 Vol. 18 May 2026 0000-00-00 Zaloznikova Objavljeno apc 2026-03-30 2026-04-26 2026-05-02 54 2073-4360 10.3390/polym18091123 276936451 https://www.mdpi.com/2073-4360/18/9/1123 1 26565f4a-47b6-11f1-969d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=43772 RAZ_Lesic_Nikolina_2026.pdf RAZ_Lesic_Nikolina_2026.pdf 1 B53EE8F4EE696B1B79C2486ED8F57499 cd4077c162b7f1d92a3d11f1832edb4e4c62a135ed5ce6eb595035be831901dc 7577725a-47b6-11f1-969d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=43773 Institut Jožef Stefan 0 0 0