Yuav tiv thaiv thiab kho li cas thaum valve corrosion?

Corrosion ntawm lub valve feem ntau yog to taub raws li kev puas tsuaj rau cov khoom siv hlau ntawm lub valve nyob rau hauv qhov kev txiav txim ntawm ib puag ncig chemical lossis electrochemical.
Txij li thaum "corrosion" tshwm sim tshwm sim nyob rau hauv kev sib cuam tshuam ntawm cov hlau thiab ib puag ncig ib puag ncig, yuav ua li cas cais cov hlau los ntawm ib puag ncig ib puag ncig lossis siv cov khoom siv tsis yog xim hlau ntau dua yog qhov tseem ceeb ntawm kev tiv thaiv corrosion.
Lub cev lub cev (xws li lub kaus mom) ntawm lub valve tuav feem ntau ntawm qhov hnyav ntawm lub valve thiab yog nyob rau hauv qhov kev sib cuag nrog nruab nrab, yog li kev xaiv ntawm lub valve feem ntau pib los ntawm lub valve lub cev khoom.
Qhov corrosion ntawm lub valve lub cev feem ntau yog 2 hom - Tshuaj corrosion & Electrochemical corrosion.
Tus nqi corrosion tuaj yeem muab faib ua rau qib raws li hauv qab no:
1. Ua tiav corrosion tsis kam: tus nqi corrosion yog tsawg dua 0.001 mm / xyoo
2. Kev tiv thaiv corrosion heev: tus nqi corrosion yog 0 001 txog 0.01 hli / xyoo;
3. Corrosion kuj: tus nqi corrosion yog 0 01 txog 0.1 hli / xyoo,
4. Tseem corrosion resistant: tus nqi corrosion yog 0.1 rau 1.0 hli/xyoo.
5. Tsis zoo corrosion kuj: tus nqi corrosion yog 1.0 mus rau 10 mm / xyoo6. Tsis muaj corrosion resistant: tus nqi corrosion yog ntau tshaj 10 hli / xyoo.
Yuav ua li cas tiv thaiv valve corrosion?
Kev tiv thaiv corrosion ntawm lub valve lub cev feem ntau yog raws li kev xaiv kom raug ntawm cov ntaub ntawv. Txawm hais tias muaj ntau cov ntaub ntawv anficorrosion, nws tsis yooj yim los xaiv qhov yog, vim tias qhov teeb meem ntawm corrosion yog qhov nyuaj heev. Piv txwv li, sulfuric acid yog heev corrosive rau hlau thaum lub concentration yog tsawg, thiab thaum lub concentration yog siab, nws yuav tsim steel.
Hydrogen yog corrosive heev rau hlau tsuas yog nyob rau hauv qhov kub thiab txias. Thaum chlorine nyob rau hauv lub xeev qhuav, nws tsis yog
corrosive heev, tab sis thaum muaj qee qhov av noo, nws yog corrosive heev. thiab ntau yam khoom siv tsis tuaj yeem siv. Qhov nyuaj ntawm kev xaiv cov khoom siv lub cev valve yog tias nws tuaj yeem tsis tsuas yog xav txog qhov teeb meem corrosion, tab sis kuj yuav tsum xav txog lub siab thiab kub tsis kam.
Qhov thib ob yog siv cov txheej txheem hauv ob sab phlu, xws li hauv ob sab phlu, hauv ob sab phlu aluminium, hauv ob sab phlu engineering plastics, hauv ob sab phlu ntuj thiab ntau yam hluavtaws roj hmab. Yog tias cov xwm txheej xov xwm tso cai, qhov no yog ib txoj hauv kev lag luam.
Qhov thib peb yog cov khoom tseem ceeb ntawm fluorine-lined valve feem ntau tuaj yeem ua tau zoo heev los tiv thaiv corrosion thaum lub siab thiab kub tsis siab.
Tsis tas li ntawd, sab nrauv ntawm lub valve lub cev kuj corroded los ntawm cov cua, thiab feem ntau steel cov ntaub ntawv yog tiv thaiv los ntawm painting.