Kev kho oxidation ntawm cov hlau yog kev tsim cov zaj duab xis oxide tiv thaiv rau ntawm qhov chaw ntawm cov hlau los ntawm kev sib cuam tshuam nrog cov pa oxygen lossis cov tshuaj oxidants, uas tiv thaiv cov hlau xeb. Cov txheej txheem oxidation suav nrog thermal oxidation, alkaline oxidation, thiab acidic oxidation.
Kev kho oxidation ntawm cov hlau yog kev tsim cov zaj duab xis oxide tiv thaiv rau ntawm qhov chaw ntawm cov hlau los ntawm kev sib cuam tshuam nrog cov pa oxygen lossis cov tshuaj oxidants, uas tiv thaiv cov hlau xeb. Cov txheej txheem oxidation suav nrog thermal oxidation, alkaline oxidation, acidic oxidation (rau cov hlau dub), tshuaj oxidation, anodic oxidation (rau cov hlau uas tsis yog ferrous), thiab lwm yam.
Siv txoj kev thermal oxidation los ua kom cov khoom hlau kub txog 600 ℃ ~ 650 ℃, thiab tom qab ntawd kho lawv nrog cov pa kub thiab cov neeg sawv cev txo qis. Lwm txoj hauv kev yog muab cov khoom hlau tso rau hauv cov ntsev hlau alkali uas yaj ntawm kwv yees li 300 ℃ rau kev kho.
Thaum siv txoj kev alkaline oxidation, muab cov khoom tso rau hauv cov tshuaj uas tau npaj tseg thiab ua kom sov rau 135 ℃ txog 155 ℃. Lub sijhawm kho mob nyob ntawm cov pa roj carbon hauv cov khoom. Tom qab kho cov khoom hlau oxidation, yaug lawv nrog dej xab npum uas muaj 15g / L txog 20g / L ntawm 60 ℃ txog 80 ℃ rau 2 txog 5 feeb. Tom qab ntawd yaug lawv nrog dej txias thiab dej kub thiab tshuab kom qhuav lossis ziab lawv rau 5 txog 10 feeb (ntawm qhov kub ntawm 80 ℃ txog 90 ℃).
Txoj kev oxidation acid 3 yog muab cov khoom tso rau hauv cov kua qaub rau kev kho. Piv nrog rau txoj kev oxidation alkaline, txoj kev oxidation acidic pheej yig dua. Cov zaj duab xis tiv thaiv uas tsim rau ntawm qhov chaw hlau tom qab kev kho muaj kev tiv thaiv corrosion thiab lub zog kho tshuab ntau dua li cov zaj duab xis nyias uas tsim tom qab kev kho alkaline oxidation.
Txoj kev oxidation tshuaj lom neeg feem ntau yog siv rau kev kho oxidation ntawm cov hlau tsis yog ferrous xws li txhuas, tooj liab, magnesium, thiab lawv cov alloys. Txoj kev ua tiav yog muab cov khoom tso rau hauv cov tshuaj uas tau npaj tseg, thiab tom qab muaj qee qhov kev hloov pauv oxidation ntawm qee qhov kub rau ib lub sijhawm, ib zaj duab xis tiv thaiv tau tsim, uas tom qab ntawd tuaj yeem ntxuav thiab ziab.
Txoj kev anodizing yog lwm txoj hauv kev rau kev oxidation ntawm cov hlau uas tsis yog ferrous. Nws yog cov txheej txheem ntawm kev siv cov khoom hlau ua anodes thiab cov txheej txheem electrolytic los tsim cov yeeb yaj kiab oxide ntawm lawv qhov chaw. Hom yeeb yaj kiab oxide no tuaj yeem ua haujlwm ua cov yeeb yaj kiab passivation ntawm cov hlau thiab cov yeeb yaj kiab txheej, nrog rau kev ua kom muaj zog sib txuas ntawm cov txheej thiab cov hlau, txo qhov nkag mus ntawm cov dej noo, thiab yog li ua kom lub neej ua haujlwm ntawm cov txheej. Nws yog siv dav hauv txheej hauv qab ntawm kev pleev xim.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-16-2024
