1.Dab tsi yog lub hauv paus ntsiab lus thiab qhov tshwm sim ntawm lub cev hnav thiab khawb?
Lub hauv paus ntsiab lus: Cov khoom siv plua plav (tshwj xeeb tshaj yog cov hlau tawv tawv, xuab zeb, quartz plua plav, thiab lwm yam) yuav tsim "micro-txiav" thiab khawb rau ntawm cov txheej txheej hauv qab ntawm cua, nag, ko taw tsheb, lossis kev sib txhuam.
Qhov tshwm sim: Cov khawb no yuav ua rau lub smoothness thiab kev ncaj ncees ntawm txheej txheej. Cov khawb me me cuam tshuam rau kev zoo nkauj, thaum khawb hnyav tuaj yeem nkag mus ncaj qha los ntawm lub tsho sab saum toj thiab txawm tias cov primer, nthuav tawm cov hlau substrate. Thaum lub substrate raug, corrosion yuav pib.
2.Dab tsi yog lub hauv paus ntsiab lus thiab qhov tshwm sim ntawm "corrosion nyob rau hauv plua plav"?
Moisture Retention: Plua plav yog hygroscopic, tsim kom muaj "humid microenvironment" ntawm txheej txheej. Txawm tias tom qab huab cua ntshiab, cov txheej hauv qab plua plav yuav nyob twj ywm rau lub sijhawm ntev, tsim cov xwm txheej zoo rau electrochemical corrosion.
Tsim kom muaj Corrosion Cells: Qee cov hmoov av muaj tshuaj lom neeg (xws li cov hmoov av muaj cov tshuaj chloride thiab sulfate ions, de-icing ntsev, thiab lwm yam). Thaum cov hmoov av no yaj hauv dej, lawv tsim cov tshuaj electrolyte uas tuaj yeem nkag mus rau qhov tsis xws luag hauv feeb lossis khawb hauv txheej, ua rau muaj kev cuam tshuam sai ntawm cov hlau substrate.
Oxygen Concentration Cells: Cov pa oxygen concentration sib txawv ntawm cov hmoov av- thaj chaw npog thiab thaj chaw huv si, ua rau muaj kev cuam tshuam hauv cheeb tsam.
Qhov tshwm sim: Corrosion tshwm sim thiab kis mus rau hauv qab txheej, tsim cov hlau oxides (xeb), uas loj dua cov hlau qub. Qhov kev nthuav dav no "pushes" txheej txheej los ntawm sab hauv, ua rau blistering, tawg, thiab thaum kawg loj - cheeb tsam tev tawm.
3.Qhov no cuam tshuam li cas rau qhov adhesion thiab kev ua haujlwm ntawm cov txheej?
Kev saib xyuas tsis zoo: Yog tias xav tau kev kho lossis rov ua dua tshiab ntawm cov txheej txheem qub, cov plua plav adhering yuav ua rau muaj kev cuam tshuam loj ntawm cov txheej txheem tshiab thiab qub, ua rau cov txheej txheem txheej txheej tshiab ua tsis tiav.
Tshuaj lom neeg corrosion: Qee cov tshuaj lom neeg cov plua plav (xws li cov kua qaub thiab alkalis) tuaj yeem cuam tshuam ncaj qha nrog cov resin hauv txheej, ua rau cov txheej rau chalk, degrade, nkig, thiab poob nws lub peev xwm tiv thaiv.
4.Dab tsi ntawm cov plua plav ua rau muaj kev pheej hmoo loj tshaj?
Siab- plua plav hardness: hlau hmoov av, xuab zeb, cement tshauv.
Highly hygroscopic los yog corrosive plua plav: ntsev, chiv, tshuaj raw khoom, muaj emissions (muaj sulfur thiab nitrogen oxides).
Organic plua plav: Txawm hais tias tsis tshua muaj corrosive, nws yooj yim rau pwm kev loj hlob, thiab cov organic acids tuaj yeem ua rau cov coatings puas.
5.Yuav tiv thaiv nws li cas?
Kev tu tsis tu ncua: Qhov no yog txoj hauv kev zoo tshaj plaws. Nws raug nquahu kom siv cov dej tsawg- tso dej siab thiab cov tshuaj ntxuav tes tsis zoo (raws li tau tham hauv cov lus nug dhau los) kom maj mam tshem cov plua plav tawm ntawm qhov chaw. Tsis txhob siv cov phom dej siab siab - tiv thaiv dej los ntawm kev nkag mus rau hauv qhov chaw.
Kev tsim kho kom zoo: Xav txog cov plua plav- pov thawj cov yam ntxwv hauv kev tsim lub tsev, zam qhov chaw so thiab kab rov tav uas yooj yim khaws cov plua plav.
Xaiv cov txheej txheem tsim nyog: Hauv thaj chaw muaj plua plav lossis thaj chaw ntug dej hiav txwv, xaiv cov txheej txheem nrog tus kheej zoo dua - ntxuav cov khoom thiab ua kom zoo dua qub (xws li PVDF fluorocarbon coatings) kom txo cov plua plav adhesion thiab pab ntxuav cov dej nag.
Tam sim ntawd hais qhov khawb: Yog tias khawb lossis puas tau pom ntawm cov txheej, kho tam sim nrog cov xim kho tshwj xeeb kom kaw qhov chaw puas.