Corrosion Of Phaj Hloov Cov Txias Txias

Hloov thiab corroding lub phaj ntawm lub txias txias yog ib qho kev ua haujlwm hnyav dua, thiab kev xeb yuav ua rau kev ua haujlwm tsis zoo thiab cov khoom siv puas tsuaj. Muaj ntau yam ntawm cov phaj hloov corrosion, xws li pitting corrosion, crevice corrosion, kev nyuaj siab corrosion cracking, intergranular corrosion, uniform corrosion, thiab lwm yam. Ntawm no yog ib co piv txwv ntawm corrosion.

Cooler pitting hais txog cov xeb lossis fouling ntawm cov hlau nto xws li stainless hlau electropolished daim hlau, siv tsis zoo, thiab txo PH nqi ntawm qhov nruab nrab, uas ua rau kev puas tsuaj ntawm cov zaj duab xis passivation ntawm qee qhov chaw hlau, ua rau qee qhov corrosion. , uas tseem hu ua thaiv roj teeb corrosion, feem ntau manifested li perforations tsawg tshaj li 1 hli los yog pits.

Intergranular corrosion ntawm cov roj txias yog los ntawm corrosion ntawm hlau nto thiab tob rau hauv sab hauv raws li cov nplej sib txawv. Qhov kev xeb no yuav ua rau poob ntawm qhov kev sib txuas ntawm cov nplej, uas ua rau lub zog ntawm cov khoom zoo heev. Txias crevice corrosion yog ib hom yeeb yuj lossis rwj-zoo li ib feem corrosion tshwm sim los ntawm kev thaiv cov roj teeb corrosion, tab sis qhov corrosion no feem ntau tshwm sim hauv cov crevices ntawm cov hlau, yog li nws yog hu ua crevice corrosion. yog vim lub electrochemical inhomogeneity ntawm qhov chaw nyob nruab nrab.