Ntau yam ntawm kev txo qis galvanic corrosion txaus ntshai tsuas yog zam kev sib txuas ntawm peb lub ntsiab lus saum toj no. Txawm li cas los xij, rau ntau qhov kev lag luam -- xws li cov tshuaj ua haujlwm lossis kev ua haujlwm sab nraud hauv thaj chaw ntsev nplua nuj -- qhov no yooj yim hais dua li ua tiav.
Xav txog cov hauv qab no thaum tsim lossis tswj cov txheej txheem piping qhov twg galvanic corrosion yog ib qho kev txhawj xeeb.
LUB GALVANIC SERIES (ELECTRODE POTENTIAL) tau piav qhia
Ib qho ntawm cov kauj ruam tseem ceeb los tiv thaiv galvanic corrosion yog xaiv cov hlau uas muaj cov khoom siv hluav taws xob zoo sib xws lossis kev ua nom ua tswv.
Raws li tau hais tseg hauv daim duab saum toj no, ntau cov hlau tsis muaj steel hlau nyob rau ntawm lub cathodic kawg ntawm qhov teev. Qhov no txhais tau tias lawv tsis tshua muaj kev puas tsuaj los ntawm galvanic corrosion. Txawm li cas los xij, yog tias siv nrog cov anodic fasteners, cov khoom siv, cov khoom siv, lossis lwm yam khoom, qhov sib txawv loj hauv kev ua nom ua tswv tuaj yeem ua rau muaj kev puas tsuaj sai ntawm lwm cov khoom.
Qhov no feem ntau pom thaum siv cov pa roj carbon steel lossis txhuas siv nrog cov kav dej stainless hlau.
PAUB TXOG ENVIRONMENTAL COMPONENTS NTAWM GALVANIC CORROSION
Nws yog ib qho tseem ceeb kom nco ntsoov tias galvanic corrosion kuj tseem yuav txawv raws li cov electrolyte txuas ob hlau. Piv txwv li, qhov txaus ntshai ntawm galvanic corrosion nyob rau hauv cov dej ntshiab heev yog tsawg heev. Txawm li cas los xij, siv tib cov hlau nyob rau hauv ib puag ncig marine lossis chloride nplua nuj thiab koj tuaj yeem pom corrosion tshwm sim sai heev.
Thaum koj qhov kev paub tseeb yuav nyob ntawm ntau yam thiab koj yuav tsum tau sab laj ib tus kws tshaj lij kom paub meej cov ntaub ntawv hais txog koj cov kev xav tau tshwj xeeb, cov ntawv hauv qab no muaj cov piv txwv ntawm qhov kev pheej hmoo ntawm galvanic corrosion los ntawm kev sib xyaw hlau sib xyaw.
OPTIONS LOS NTAWM GALVANIC CORROSION RISK
Txawm tias cov khoom siv zoo tshaj plaws tau xaiv, nws yuav tsis tuaj yeem tshem tawm tag nrho cov kev pheej hmoo corrosion galvanic. Yog tias yog li ntawd, cov khoom siv insulating thiab tawg txoj kev hluav taws xob qhov twg ua tau yog cov kev xaiv zoo los txhawb kev tiv thaiv corrosion ntxiv thiab ua kom lub neej ua haujlwm ntev.
Cov kev xaiv muaj xws li:
Insulating cov ntaub ntawv sib txawv siv cov khoom tsis yog cov khoom siv coatings, roj, xim, kev kho mob, lossis primers. Kev tiv thaiv zoo tshaj yog muab los ntawm insulating ob cov ntaub ntawv. Txawm li cas los xij, insulating tsuas yog cov khoom siv anodic tuaj yeem pab ua kom qeeb galvanic corrosion txawm tias nws tsis tuaj yeem tiv thaiv nws.
Siv cov buffers -- xws li cov yeeb nkab qhwv, cov hlua khi, thiab hnav cov ntaub qhwv -- ntawm cov hlau tsis sib xws kom tshem tawm cov galvanic cell tsim thiab cuam tshuam cov kab hluav taws xob.
Plating, los yog galvanizing, kuj yog ib txoj kev zoo ntawm kev txo cov galvanic corrosion txaus ntshai los yog hloov cov electrode muaj peev xwm ntawm cov khoom yam tsis tas hloov lawv cov qauv. Piv txwv li, nws yog ib qho nyuaj rau phaj carbon steel fasteners nrog zinc kom zoo heev txhim kho corrosion kuj. Txawm li cas los xij, txhua yam hlau zoo -- xws li chrome, npib tsib xee, lossis kub -- tuaj yeem siv tau thiab.