(1) Organic hnyav tu

Nws tsuas yog siv cov kuab tshuaj organic kom yaj saponified thiab unsaponified roj kom tshem tawm cov roj stains. Cov kuab tshuaj organic feem ntau muaj xws li ethanol, ntxuav cov roj av, toluene, carbon tetrachloride, trichloroethylene, thiab lwm yam. Cov kuab tshuaj muaj txiaj ntsig zoo dua yog carbon tetrachloride thiab trichloroethylene, uas yuav tsis hlawv thiab siv tau rau kev tshem tawm roj ntawm qhov kub thiab txias. Nws yuav tsum raug sau tseg tias tom qab cov roj tshem tawm los ntawm cov kuab tshuaj organic, ntxiv cov roj tshem tawm yuav tsum tau nqa tawm. Thaum cov kuab tshuaj volatilizes ntawm qhov chawlub cev, feem ntau yog nyias zaj duab xis sab laug, uas tuaj yeem raug tshem tawm hauv cov txheej txheem hauv qab no xws li alkali ntxuav thiab tshem tawm cov roj electrochemical.

(2) Electrochemical tu

Kev tshem tawm cov roj cathode lossis hloov pauv siv cov anode thiab cathode feem ntau yog siv. Cov roj hydrogen sib cais los ntawm cathode los yog cov pa oxygen cais tawm ntawm cov anode los ntawm electrochemical cov tshuaj tiv thaiv yog mechanically stirred los ntawm cov tshuaj nyob rau saum npoo ntawm cov khoom.lub cevlos txhawb cov roj stain kom dim ntawm cov hlau nto. Nyob rau tib lub sijhawm, kev daws teeb meem tsis tu ncua, uas yog qhov zoo rau cov tshuaj tiv thaiv saponification thiab emulsification ntawm cov roj. Cov roj uas tseem tshuav yuav raug muab cais tawm ntawm cov hlau nto hauv qab ntawm cov npuas tsis tu ncua. Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm cathodic degreasing, hydrogen feem ntau permeates rau hauv cov hlau, ua rau hydrogen embrittlement. Txhawm rau tiv thaiv hydrogen embrittlement, cov cathode thiab anode feem ntau yog siv los tshem tawm cov roj hloov pauv.

(3) Alkaline ntxuav

Ib txoj kev tu raws li kev siv tshuaj lom neeg ntawm alkali yog dav siv vim nws txoj kev siv yooj yim, tus nqi qis thiab yooj yim muaj cov khoom siv raw. Txij li cov txheej txheem ntxuav alkali nyob ntawm saponification, emulsification thiab lwm yam haujlwm, ib qho alkali tsis tuaj yeem siv los ua kom tiav qhov kev ua haujlwm saum toj no. Ntau yam khoom siv feem ntau yog siv, thiab cov khoom ntxiv xws li surfactants qee zaum ntxiv. Lub alkalinity txiav txim siab qib ntawm saponification cov tshuaj tiv thaiv, thiab lub siab alkalinity txo qhov nro ntawm cov roj thiab cov tshuaj, ua cov roj yooj yim rau emulsify. Tsis tas li ntawd, tus neeg saib xyuas tu tshuav nyob rau saum npoo ntawm lubrectangular hollow seemtuaj yeem raug tshem tawm los ntawm kev ntxuav dej tom qab ntxuav alkali.

(4) Surfactant tu

Nws yog ib txoj kev tshem tawm cov roj siv dav siv los ntawm kev siv cov yam ntxwv ntawm surfactant xws li tsis tshua muaj qhov nro, zoo wettability thiab muaj zog emulsifying muaj peev xwm. Los ntawm cov emulsification ntawm surfactant, lub ntsej muag lub ntsej muag interfacial nrog qee lub zog yog tsim los ntawm cov roj-dej interface los hloov lub xeev ntawm lub interface, kom cov roj hais tawm mus rau hauv cov tshuaj aqueous los tsim cov emulsion. Los yog los ntawm kev ua kom tiav ntawm surfactant, cov roj stain insoluble hauv dej ntawm lublub cevyog yaj nyob rau hauv lub surfactant micelle, thiaj li mus rau hloov cov roj stain mus rau aqueous tov.