Tooj alloycorrosion
atmospheric corrosion
Lub atmospheric corrosion ntawm cov ntaub ntawv hlau feem ntau yog nyob ntawm cov dej vapor hauv cov cua thiab cov yeeb yaj kiab dej ntawm cov khoom siv.Tus txheeb ze humidity ntawm huab cua thaum tus nqi corrosion ntawm cov hlau cua pib nce sharply yog hu ua qhov tseem ceeb humidity.Qhov tseem ceeb ntawm cov av noo ntawm tooj liab alloys thiab ntau lwm yam hlau yog nruab nrab ntawm 50% thiab 70%.Cov pa phem hauv huab cua muaj qhov cuam tshuam loj rau kev xeb ntawm tooj liab alloys.
Kev lwj ntawm cov nroj tsuag thiab cov pa tso tawm los ntawm cov chaw ua haujlwm ua rau ammonia thiab hydrogen sulfide gas muaj nyob rau hauv qhov chaw.Ammonia ua kom nrawm nrawm ntawm tooj liab thiab tooj liab alloys, tshwj xeeb tshaj yog kev nyuaj siab corrosion.Cov kua qaub kua qaub xws li C02, SO2, NO2 nyob rau hauv lub nroog kev lag luam huab cua yog yaj nyob rau hauv cov dej zaj duab xis thiab hydrolyzed, uas ua rau cov dej zaj duab xis acidified thiab cov zaj duab xis tiv thaiv tsis ruaj khov.
splash cheeb tsam corrosion
Tus cwj pwm corrosion ntawm tooj liab alloys nyob rau hauv seawater splash cheeb tsam yog heev ze rau qhov nyob rau hauv lub marine atmospheric cheeb tsam.Txhua tus tooj liab alloy uas muaj kev tiv thaiv corrosion zoo rau cov huab cua hauv hiav txwv hnyav kuj tseem muaj kev tiv thaiv corrosion zoo hauv thaj tsam txaws.Qhov chaw txaws muab cov pa oxygen txaus los ua kom muaj zog ntawm cov hlau, tab sis ua rau nws yooj yim dua rau cov tooj liab thiab tooj liab alloys kom nyob twj ywm.Tus nqi corrosion ntawm tooj liab alloys raug rau thaj tsam spatter feem ntau tsis tshaj 5 μm / a.
kev nyuaj siab corrosion
Quaternary cracking ntawm tooj dag yog ib tug neeg sawv cev ntawm kev nyuaj siab corrosion ntawm tooj liab alloys.Cov kab nrib pleb raws caij nyoog tau pom nyob rau hauv thaum ntxov xyoo pua 20th thiab xa mus rau cov kab nrib pleb nyob rau hauv ib feem ntawm cov mos txwv casing uas nws shrinks mus rau lub taub hau.Qhov no tshwm sim feem ntau tshwm sim nyob rau hauv lub tropics, tshwj xeeb tshaj yog nyob rau hauv lub caij los nag, yog li ntawd nws yog hu ua lub caij ntuj no cracking.Vim hais tias nws muaj feem xyuam rau ammonia los yog ammonia derivatives, nws tseem hu ua ammonia cracking.Qhov tseeb, muaj cov pa oxygen thiab lwm yam oxidants, nrog rau qhov muaj dej, kuj tseem ceeb rau kev ntxhov siab corrosion ntawm tooj dag.Lwm qhov chaw uas tuaj yeem ua rau muaj kev ntxhov siab corrosion ntawm tooj liab alloys xws li: huab cua, dej tshiab, thiab dej hiav txwv hnyav hnyav los ntawm SO2;sulfuric acid, nitric acid, chav, thiab aqueous daws xws li tartaric acid, acetic acid, thiab citric acid, ammonia thiab mercury siv los ntxuav qhov chaw.
Decomposition corrosion
Brass dezincification yog ib hom ntawm tooj liab alloy de-composition corrosion, uas tuaj yeem tshwm sim ib txhij nrog cov txheej txheem kev ntxhov siab, lossis nws tuaj yeem tshwm sim ib leeg.Muaj ob hom dezincification: ib qho yog txheej txheej exfoliation hom dezincification, uas yog nyob rau hauv daim ntawv ntawm corrosion tsis zoo thiab tsis tshua muaj teeb meem rau kev siv cov ntaub ntawv;Lub zog ntawm cov khoom yog txo qis, thiab qhov txaus ntshai yog ntau dua.
Corrosion nyob rau hauv marine ib puag ncig
Ntxiv nrog rau thaj chaw marine atmospheric, qhov corrosion ntawm tooj liab alloys nyob rau hauv marine ib puag ncig kuj muaj xws li seawater splash cheeb tsam, tidal range cheeb tsam thiab tag nrho immersion cheeb tsam.
Lub sij hawm xa tuaj: Plaub Hlis-01-2022