Ibyuma bitagira umuyonga birimo byibuze chromium 10.5%, ikora urwego ruto, rutagaragara, kandi rwuzuzanya cyane na oxyde ya oxyde hejuru yicyuma cyitwa "passive layer."Uru rupapuro rwinzira nirwo rutuma ibyuma bidafite ingese birwanya ingese no kwangirika.
Iyo ibyuma bihuye na ogisijeni nubushuhe, chromium mubyuma ikora hamwe na ogisijeni yo mu kirere ikora urwego ruto rwa oxyde ya chromium hejuru yicyuma.Iyi chromium oxyde layer irinda cyane, kuko ihagaze neza kandi ntisenyuka byoroshye.Nkigisubizo, irinda neza ibyuma munsi yacyo guhura numwuka nubushuhe, bukenewe kugirango ingese ibe.
Igice cya pasiporo ningirakamaro mukurwanya kwangirika kwicyuma, kandi ingano ya chromium mubyuma igena ubushobozi bwayo bwo kurwanya ingese.Ibirungo byinshi bya chromium bivamo uburyo bwo kurinda passiyeri no kurwanya ruswa neza.Byongeye kandi, ibindi bintu nka nikel, molybdenum, na azote nabyo birashobora kongerwaho ibyuma kugirango birusheho kwangirika.
Igihe cyo kohereza: Gashyantare-15-2023