Nyob rau hauv cov tswv yim engineering, muaj peb lub ntsiab tiv thaiv txoj kev rau steel corrosion.
1.Txoj kev tiv thaiv zaj duab xis
Cov yeeb yaj kiab tiv thaiv yog siv los cais cov hlau los ntawm qhov nruab nrab nyob ib puag ncig, kom tsis txhob muaj kev puas tsuaj los ntawm cov khoom nruab nrab sab nraud ntawm cov hlau.Piv txwv li, tshuaj tsuag xim, enamel, yas, thiab lwm yam ntawm cov hlau nto;los yog siv cov txheej txheem hlau ua cov yeeb yaj kiab tiv thaiv, xws li zinc, tin, chromium, thiab lwm yam.
2.Txoj kev tiv thaiv electrochemical
Qhov laj thawj tshwj xeeb ntawm kev xeb tuaj yeem muab faib ua txoj kev tiv thaiv tsis muaj tam sim no thiab txoj kev tiv thaiv tam sim no txaus nyiam.
Txoj kev tiv thaiv tsis muaj tam sim no tseem hu ua txoj kev txi anode.Nws yog txhawm rau txuas cov hlau uas muaj zog dua hlau, xws li zinc thiab magnesium, rau cov qauv hlau.Vim tias zinc thiab magnesium muaj peev xwm qis dua li cov hlau, zinc, thiab magnesium ua lub anode ntawm corrosion roj teeb.puas (sacrificial anode), thaum lub steel qauv tiv thaiv.Txoj kev no feem ntau yog siv rau qhov chaw uas nws tsis yooj yim los yog tsis yooj yim los npog cov txheej txheem tiv thaiv, xws li chav boilers, cov kav dej hauv av ntawm lub nkoj plhaub, cov chaw nres nkoj engineering, txoj kev thiab choj vaj tse, thiab lwm yam.
Txoj kev tiv thaiv tam sim no yog tso qee cov hlau los yog lwm cov hlau refractory nyob ze ntawm cov qauv hlau, xws li cov hlau silicon thiab cov hlau lead-silver, thiab txuas cov ncej tsis zoo ntawm DC lub zog hluav taws xob sab nraud rau cov qauv hlau tiv thaiv, thiab cov khoom siv hluav taws xob tsis zoo. zoo ncej txuas nrog cov qauv hlau refractory.Ntawm cov hlau, tom qab hluav taws xob, cov hlau refractory dhau los ua cov anode thiab corroded, thiab cov qauv hlau ua cov cathode thiab tiv thaiv.
3.Taijin Tshuaj
Cov pa roj carbon steel yog ntxiv nrog cov ntsiab lus uas tuaj yeem txhim kho kev tiv thaiv corrosion, xws li npib tsib xee, chromium, titanium, tooj liab, thiab lwm yam, los ua cov hlau sib txawv.
Cov txheej txheem saum toj no tuaj yeem siv los tiv thaiv kev xeb ntawm cov hlau tuav hauv cov pob zeb ua kom muaj zog, tab sis txoj kev lag luam zoo tshaj plaws yog los txhim kho qhov ntom thiab alkalinity ntawm cov pob zeb thiab xyuas kom meej tias cov hlau tuav muaj cov txheej txheem tiv thaiv txaus.
Hauv cov khoom siv cement hydration, vim yog calcium hydroxide ntawm li 1/5, pH tus nqi nruab nrab yog li 13, thiab muaj cov calcium hydroxide ua rau cov zaj duab xis passivation ntawm cov hlau bar los tsim cov txheej txheem tiv thaiv.Nyob rau tib lub sijhawm, calcium hydroxide kuj tuaj yeem ua nrog lub moos atmospheric CQ kom txo cov alkalinity ntawm cov pob zeb, cov zaj duab xis passivation yuav raug rhuav tshem, thiab cov hlau nto yog nyob rau hauv lub xeev qhib.Nyob rau hauv ib qho chaw ntub dej, electrochemical corrosion pib tshwm sim ntawm qhov chaw ntawm steel bar, uas ua rau cov pob zeb tawg ntawm qhov bar.Yog li ntawd, carbonization tsis kam ntawm qhob yuav tsum tau txhim kho los ntawm kev txhim kho cov compactness ntawm pob zeb.
Tsis tas li ntawd, chloride ions muaj cov nyhuv ntawm kev rhuav tshem cov yeeb yaj kiab passivation.Yog li ntawd, thaum npaj cov pob zeb muaj zog, cov tshuaj chloride ntsev yuav tsum raug txwv.
Post lub sij hawm: Oct-10-2022