Qhov sib txawv tseem ceeb ntawm kev tiv thaiv cathodic thiab kev tiv thaiv kev txi yog kev tiv thaiv cathodic yog cov txheej txheem ntawm kev tiv thaiv cov hlau nto los ntawm kev ua kom nws cov cathode nyob rau hauv cov hluav taws xob hluav taws xob hluav taws xob thaum kev tiv thaiv kev txi muaj kev tiv thaiv cov hlau xav tau los ntawm kev txi anode..
Kev tiv thaiv Cathodic thiab kev tiv thaiv kev txi yog ob yam txheej txheem electrochemical. Kev tiv thaiv Cathodic cuam tshuam nrog kev tiv thaiv ntawm cov hlau nto los ntawm kev ua kom nws ua cathode. Kev tiv thaiv kev txi muaj xws li cov txheej txheem tib yam, tab sis nws piav qhia txog lub luag haujlwm ntawm cov anode uas ua rau cov hlau xav tau ib qho cathode.
Cathodic Protection yog dab tsi?
Kev tiv thaiv Cathodic yog hom txheej txheem electrochemical uas muaj txiaj ntsig zoo hauv kev tiv thaiv cov hlau los ntawm kev ua kom nws cov cathode hauv electrochemical cell. Lo lus no txhais tau tias yog CP. Kev tiv thaiv cathodic yog ib qho tseem ceeb los tiv thaiv cov hlau nto ntawm corrosion. Peb tuaj yeem soj ntsuam ntau hom kev tiv thaiv cathodic xws li kev tiv thaiv galvanic lossis kev tiv thaiv kev txi, kev nyiam cov tshuab tam sim no thiab cov tshuab hybrid.
Daim duab 01: Kev Tiv Thaiv Catholic
Nyob rau hauv txoj kev tiv thaiv cathodic, cov hlau txiab ua rau xeb tsis yog cov hlau tiv thaiv. Ntxiv mus, 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. Tsis tas li ntawd, peb tuaj yeem siv cov txheej txheem no los tiv thaiv cov roj los yog cov kav dej ua los ntawm cov hlau, cov tso tsheb hlau luam, nkoj thiab nkoj hulls, galvanized steel, thiab lwm yam.
Kev Tiv Thaiv Kev Txhaum Cai yog dab tsi?
Kev tiv thaiv kev txi yog hom txheej txheem electrochemical uas cov hlau muaj siab tiv thaiv los ntawm kev txi anode. Sacrificial anodes yog cov hlau uas muaj zog heev lossis cov hlau alloys uas tuaj yeem tiv thaiv cov hlau tsis tshua muaj zog los ntawm corrosion. Lub sij hawm galvanic anode kuj tseem siv rau npe cov anodes. Sacrificial anodes tuaj yeem muab kev tiv thaiv cathodic. Feem ntau, anodes tau noj thaum lub sijhawm tiv thaiv, yog li kev tiv thaiv yuav tsum tau hloov thiab tswj.
Daim duab 02: Kev Siv Lub Cim Txhaum Cai
Peb tuaj yeem siv cov ntaub ntawv sib txawv raws li kev txi anodes. Feem ntau, lawv yog cov hlau ntshiab xws li zinc thiab magnesium. Txawm li cas los xij, peb tuaj yeem siv cov alloys ntawm magnesium lossis aluminium. Ntxiv mus, cov anodes sacrificial no muab kev tiv thaiv los ntawm kev ua electronegative los yog ntau anodic ntau dua li cov hlau tiv thaiv. Thaum lub sij hawm kev tiv thaiv no, ib tug tam sim no dhau los ntawm lub sacrificial anode rau cov hlau tiv thaiv, thiab cov hlau tiv thaiv yuav ua ib tug cathode. Yog li ntawd, cov txheej txheem no tsim cov galvanic cell.
Thaum muab cov anodes fij tseg, peb tuaj yeem siv cov hlau lead (txuas rau ntawm cov hlau saum npoo peb yuav tiv thaiv los ntawm kev vuam) lossis siv cov hlua cam khwb cia-m (txawm los ntawm vuam lossis siv cov hlua khi ua qhov chaw txuas). Muaj ntau daim ntawv thov ntawm kev txi anodes, suav nrog kev tiv thaiv ntawm lub nkoj nkoj, lub tshuab rhaub dej, cov kav dej, cov tso tsheb hlau luam hauv av, refineries, thiab lwm yam.
Qhov txawv ntawm Cathodic Protection thiab Sacrificial Protection yog dab tsi?
Kev tiv thaiv Cathodic thiab kev tiv thaiv kev txi yog cov txheej txheem electrochemical tseem ceeb. Qhov sib txawv tseem ceeb ntawm kev tiv thaiv cathodic thiab kev tiv thaiv kev txi yog kev tiv thaiv cathodic yog cov txheej txheem ntawm kev tiv thaiv cov hlau nto los ntawm kev ua kom nws cov cathode hauv cov hluav taws xob hluav taws xob thaum kev tiv thaiv kev txi muaj kev tiv thaiv ntawm cov hlau xav tau los ntawm kev txi anode.
Hauv qab infographic qhia txog qhov sib txawv ntawm kev tiv thaiv cathodic thiab kev tiv thaiv kev txi.
Summary – Cathodic Protection vs Sacrificial Protection
Kev tiv thaiv Cathodic thiab kev tiv thaiv kev txi yog cov txheej txheem electrochemical tseem ceeb. Qhov sib txawv tseem ceeb ntawm kev tiv thaiv cathodic thiab kev tiv thaiv kev txi yog kev tiv thaiv cathodic yog cov txheej txheem ntawm kev tiv thaiv cov hlau nto los ntawm kev ua kom nws cov cathode hauv cov hluav taws xob hluav taws xob thaum kev tiv thaiv kev txi muaj kev tiv thaiv ntawm cov hlau xav tau los ntawm kev txi anode.
