Feem ntau, txoj kev tiv thaiv corrosion tuaj yeem muab faib ua ob pawg loj:
1.Kev xaiv cov khoom siv tiv thaiv corrosion thiab lwm yam kev tiv thaiv.
2. Xaiv cov txheej txheem tsim nyog thiab cov cuab yeej siv.
Ua raws li cov txheej txheem kev cai nruj me ntsis hauv kev tsim tshuaj lom neeg tuaj yeem tshem tawm qhov tshwm sim tsis tsim nyog corrosion. Txawm li cas los xij, txawm tias siv cov khoom siv zoo corrosion-resistant, cov txheej txheem ua haujlwm tsis zoo tseem tuaj yeem ua rau muaj kev xeb loj heev.
1. Inorganic Corrosion Inhibitorscov
Feem ntau, ntxiv ib qho me me ntawm cov tshuaj tiv thaiv corrosion rau ib puag ncig corrosive tuaj yeem ua kom qeeb hlau corrosion. Cov inhibitors no feem ntau muab faib ua peb hom: inorganic, organic, thiab vapor-phase inhibitors, txhua tus muaj cov txheej txheem sib txawv.
• Anodic Inhibitors (txo qis cov txheej txheem anodic):
Cov no suav nrog oxidizers (chromates, nitrites, hlau ions, thiab lwm yam) uas txhawb nqa anodic passivation lossis anodic filming agents (alkalis, phosphates, silicates, benzoates, thiab lwm yam) uas tsim cov yeeb yaj kiab tiv thaiv ntawm qhov chaw anode. Lawv feem ntau tshwm sim hauv thaj av anodic, txhim kho anodic polarization. Feem ntau, anodic inhibitors tsim cov yeeb yaj kiab tiv thaiv ntawm qhov chaw anode, uas muaj txiaj ntsig zoo tab sis muaj qee qhov kev pheej hmoo - cov tshuaj tsis txaus yuav ua rau cov yeeb yaj kiab tsis tiav, ua rau me me raug liab qab thaj chaw hlau nrog siab anodic tam sim no ntom, ua rau pitting corrosion ntau dua.
• Cathodic Inhibitors (ua raws li cov tshuaj tiv thaiv cathodic):
Piv txwv xws li calcium, zinc, magnesium, tooj liab, thiab manganese ions, uas hnov mob nrog hydroxide ions ua nyob rau hauv cathode los tsim insoluble hydroxides. Cov no ua cov yeeb yaj kiab tuab ntawm qhov chaw cathode, thaiv cov pa oxygen diffusion thiab nce concentration polarization.
• Mixed Inhibitors (txhaj tshuaj tiv thaiv anodic thiab cathodic):
Cov no yuav tsum muaj kev sim txiav txim siab txog qhov zoo tshaj plaws.
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2.Organic Corrosion Inhibitors
Organic inhibitors ua hauj lwm ntawm adsorption, tsim ib qho tsis pom, molecular-tuab zaj duab xis ntawm cov hlau saum npoo uas ib txhij suppresses ob qho tib si anodic thiab cathodic cov tshuaj tiv thaiv (txawm tias muaj kev sib txawv). Cov organic inhibitors muaj xws li nitrogen-, sulfur-, oxygen-, thiab phosphorus-muaj cov tebchaw. Lawv cov txheej txheem adsorption nyob ntawm seb cov qauv molecular thiab tuaj yeem raug cais raws li:
· Electrostatic adsorption
· Tshuaj adsorption
· π-bond (delocalized electron) adsorption
Organic inhibitors tau siv dav thiab hloov pauv sai, tab sis lawv kuj muaj qhov tsis zoo, xws li:
· Cov khoom kis tau tus mob (tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov kev noj zaub mov)-thaum muaj txiaj ntsig zoo hauv ib tus neeg ua haujlwm
duction theem, lawv yuav ua teeb meem rau lwm tus.
· Inhibition ntawm yam xav tau (xws li, slows down zaj duab xis tshem tawm thaum lub sij hawm acid pickling).
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3. Vapor-Phase Corrosion Inhibitorscov
Cov no yog cov khoom tsis haum xeeb uas muaj cov tshuaj tiv thaiv corrosion-inhibiting functional pawg, feem ntau yog siv los tiv thaiv hlau qhov chaw thaum lub sij hawm cia thiab thauj (feem ntau nyob rau hauv cov ntaub ntawv khoom). Lawv cov vapors tso tawm active inhibiting pab pawg nyob rau hauv atmospheric noo noo, uas ces adsorb mus rau lub hlau nto kom qeeb corrosion.
Tsis tas li ntawd, lawv yog cov adsorptive inhibitors, txhais tau tias cov hlau tiv thaiv tsis tas yuav tshem tawm xeb ua ntej.
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Post lub sij hawm: Oct-09-2025