Masimbi mazhinji anozogadzira firimu reoxyde pamusoro panguva yekuita neokisijeni mumhepo.Asi zvinosuwisa, macompounds akaumbwa pane zvakajairika carbon steel acharamba achiita oxidize, zvichiita kuti ngura iwedzere nekufamba kwenguva, uye pakupedzisira inogadzira maburi.Kuti tidzivise mamiriro ezvinhu aya, tinowanzo shandisa pendi kana simbi isingaite oxidation (senge zingi, nickel, uye chromium) kuita electroplating pamusoro pekabhoni simbi.
Rudzi urwu rwekudzivirira ingori firimu repurasitiki.Kana chidziviriro chekudzivirira chikaparadzwa, simbi yepasi ichatanga kuita ngura.Apo pane kudiwa, kune mhinduro, uye kushandiswa kwesimbi isina tsvina kunogona kugadzirisa zvakakwana dambudziko iri.
Kupokana kwekuora kwesimbi isina tsvina kunoenderana ne "chromium" chinhu mukuumbwa kwayo, nekuti chromium chimwe chezvikamu zvesimbi, saka nzira dzekudzivirira hadzina kufanana.Kana iyo chromium yemukati inosvika 10.5%, iyo mhepo yekudzivirira kwesimbi yesimbi inowedzera zvakanyanya, asi kana chromium yemukati yakakwira, kunyangwe kushorwa kwecorrosion kuchiri kuvandudzwa, mhedzisiro yacho haisi pachena.
Chikonzero ndechekuti kana chromium ichishandiswa pakugadzirisa zviyo zvekusimbisa simbi, rudzi rweokisidhi yekunze inoshandurwa kuita okisijeni yepamusoro yakafanana neyakaumbwa pachene chromium metal.Iyi yakanamatira zvakasimba chromium-rich metal oxide inodzivirira pamusoro kubva pakuwedzerwa oxidation nemhepo.Iri rudzi rweokisisa layer yakatetepa, uye kupenya kwechisikigo kunze kwesimbi kunogona kuoneka kuburikidza naro, zvichiita kuti simbi isina tsvina ive neyakasiyana simbi yepasi.
Uyezve, kana iyo denga repamusoro rikakuvadzwa, chikamu chakafumurwa chepamusoro chinozvigadzirisa pachacho nemhepo uye gadzirazve iyi "passive firimu" kuti irambe ichiita basa rekudzivirira.Naizvozvo, simbi dzese dzisina tsvina dzine chimiro chakafanana, ndiko kuti, chromium yemukati iri pamusoro pe10.5%.
Nguva yekutumira: Zvita-19-2022