Qhov sib txawv tseem ceeb ntawm kev tiv thaiv anodic thiab cathodic yog tias hauv kev tiv thaiv anodic, qhov chaw yuav tsum tau tiv thaiv ua tus anode whereas, hauv cathodic tiv thaiv, qhov chaw tiv thaiv ua raws li cathode.
Anodic thiab cathodic tiv thaiv yog ob txoj kev siv hluav taws xob uas peb siv los tiv thaiv qhov chaw los ntawm xeb lossis xeb. Hauv cov txheej txheem electrochemical, peb siv lub xov tooj ntawm tes electrochemical nrog ob lub electrodes ua anode thiab cathode. Hauv cov txheej txheem tiv thaiv anodic thiab cathodic, peb siv qhov chaw tiv thaiv (substrate) raws li anode lossis cathode, uas ua rau lub npe cov txheej txheem xws li. Kev tiv thaiv kev txi yog ib hom kev tiv thaiv cathodic uas peb siv cov hlau ua kev txi anode. Nyob rau hauv cov txheej txheem no, no sacrificial hlau corrodes thaum zam lub corrosion ntawm lub cathode.
Anodic Protection yog dab tsi?
Kev tiv thaiv Anodic yog hom txheej txheem electrochemical uas peb tuaj yeem tiv thaiv cov hlau nto los ntawm kev ua nws cov anode hauv electrochemical cell. Peb tuaj yeem pom qhov no yog AP. Txawm li cas los xij, txoj kev no tsuas yog ua tau rau cov khoom siv-ib puag ncig kev sib xyaw ua ke uas qhia pom dav dav dav. i.e. steel thiab stainless hlau hauv 98% sulfuric acid.
Nyob hauv AP, peb yuav tsum coj cov hlau mus rau qhov muaj peev xwm siab. Tom qab ntawd, cov hlau ua passive vim yog tsim cov txheej txheem tiv thaiv. Txawm li cas los xij, AP tsis yog siv dav hauv kev tiv thaiv cathodic vim tias nws tsuas yog siv rau cov hlau uas muaj cov txheej txheem txaus ntseeg siab ntawm qhov chaw; Piv txwv li, stainless hlau.
Muaj ob qhov kev txiav txim siab loj rau daim ntawv thov AP. Ua ntej, peb yuav tsum xyuas kom meej tias tag nrho cov system nyob rau hauv passive ntau yam. Qhov thib ob, peb yuav tsum muaj kev paub meej ntawm ions, uas tuaj yeem ua rau muaj qhov dav dav.
Cathodic Protection yog dab tsi?
Kev tiv thaiv Cathodic yog hom txheej txheem electrochemical uas peb tuaj yeem tiv thaiv cov hlau los ntawm kev ua kom nws cov cathode hauv electrochemical cell. Peb tuaj yeem txhais tau tias yog CP. CP tuaj yeem tiv thaiv cov hlau los ntawm corrosion. Muaj ntau hom CP; Piv txwv li, kev tiv thaiv galvanic lossis kev tiv thaiv kev txi, kev qhuas cov tshuab tam sim no thiab cov tshuab hybrid.
Daim duab 01: Kev Txaus Siab Tam Sim No
Nyob rau hauv txoj kev no, cov hlau txiab corrodes es tsis txhob ntawm cov hlau tiv thaiv. Yog tias peb siv kev tiv thaiv cathodic rau cov qauv loj xws li cov kav dej ntev, cov txheej txheem tiv thaiv galvanic tsis txaus. Yog li ntawd, peb yuav tsum tau muab tam sim no txaus siv ib qho hluav taws xob DC sab nraud.
Daim duab 02: Ib qho kev txi Anode - Zinc Txheej
Ntxiv mus, peb tuaj yeem siv cov txheej txheem no los tiv thaiv cov roj lossis cov kav dej ua los ntawm cov hlau, cov tso tsheb hlau luam, cov nkoj thiab lub nkoj hulls, galvanized steel, thiab lwm yam.
Qhov txawv ntawm Anodic thiab Cathodic Protection yog dab tsi?
Kev tiv thaiv Anodic yog hom txheej txheem electrochemical uas peb tuaj yeem tiv thaiv cov hlau nto los ntawm kev ua nws cov anode hauv electrochemical cell, thaum cathodic tiv thaiv yog hom electrochemical txheej txheem uas peb tuaj yeem tiv thaiv cov hlau los ntawm kev ua. Nws yog cathode nyob rau hauv electrochemical cell. Yog li, qhov sib txawv tseem ceeb ntawm kev tiv thaiv anodic thiab cathodic yog tias, hauv kev tiv thaiv anodic, qhov chaw yuav tsum tau tiv thaiv ua tus anode whereas, hauv cathodic tiv thaiv, nws yog cathode.
Tsis tas li ntawd, kev tiv thaiv anodic cuam tshuam nrog kev cuam tshuam ntawm cov hlau reactivity los ntawm kev kho lub peev xwm ntawm cov hlau ntau dua; Txawm li cas los xij, kev tiv thaiv cathodic suav nrog kev thim rov qab ntawm qhov ntws ntawm tam sim no ntawm ob qhov sib txawv ntawm cov electrodes. Yog li, peb tuaj yeem txiav txim siab qhov no ib yam li qhov sib txawv ntawm kev tiv thaiv anodic thiab cathodic.
Summary – Anodic vs Cathodic Protection
Kev tiv thaiv Anodic yog hom txheej txheem electrochemical uas peb tuaj yeem tiv thaiv cov hlau nto los ntawm kev ua nws cov anode hauv electrochemical cell, thaum cathodic tiv thaiv yog hom electrochemical txheej txheem uas peb tuaj yeem tiv thaiv cov hlau los ntawm kev ua. Nws yog cathode nyob rau hauv electrochemical cell. Qhov sib txawv tseem ceeb ntawm kev tiv thaiv anodic thiab cathodic yog tias, hauv kev tiv thaiv anodic, qhov chaw tiv thaiv yog qhov anode whereas, hauv kev tiv thaiv cathodic, nws yog cathode.
